The U.S. Department of Energy's Office of Scientific and Technical Information 0000006154 00000 n
Image analysis protocol with MATLAB code (PDF). 0000029995 00000 n
Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Molecular dynamics simulations of 9, 18, 27, and 36-mers of polyethylene oxide (PEO) and 27-mers of polyethylene glycol (PEG) in water based on C35r yield a persistence length λ = 3.7 … the Altmetric Attention Score and how the score is calculated. The DNA strands we use have a contour length (l c = 40 nm) that is ∼8 times the Kuhn length of single-stranded DNA, l Kuhn = 5 nm . 63 51
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The Kuhn length for polyethylene glycol (PEG, also known as PEO, 'O' for 'oxide') is 1.8 nm. polymers can be correlated to the Kuhn length of the polymer,39,40 which in PEO is 8 Å.41 Thus, if 8 Å is used as the average length of the orbitals and a width of B2–3 Å (equivalent to the hydrogen distance … 0000005927 00000 n
Article Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. startxref
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For permission to reproduce, republish and %%ec㴴OPPH T\��--�=�BC#` 36 Deuterium oxide D 2O with 99.9% iso-topic purity was purchased from Cambridge Isotope Labora-tories. 0000044897 00000 n
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Find more information about Crossref citation counts. 0000004382 00000 n
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Information. 0000029335 00000 n
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https://pubs.acs.org/doi/10.1021/acs.macromol.0c00076, http://pubs.acs.org/page/copyright/permissions.html. 0000021662 00000 n
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These metrics are regularly updated to reflect usage leading up to the last few days. 0000035335 00000 n
Knows someone the persistence length and the the Kuhn length of PEG/PEO? 0000032425 00000 n
We elucidate the influence of chemical structure on macromolecular hydrodynamics, rheological response, and pinching dynamics underlying drop formation/liquid transfer using polyethylene oxide (PEO) and 2-hydroxyethyl cellulose (HEC) as two polymers with distinct Kuhn length and matched overlap concentrations. Indeed, electron localization seem to follow the Kuhn length of the polymer18,19 which for PEO is ~8Å20. Table 2.1 Characteristic ratios, Kuhn lengths, and molar masses of Kuhn monomers for common polymers Structure Cx b ($) Polymer P (gcm - 3 M. (g mol-) 1,4-Polyisoprene (PI) 1,4-Polybutadiene (PB) Polypropylene (PP) Polyethylene oxide) (PEO… For PEO, the controUing length … This system has been studied recently by 1H NMR revealing the very unusual result that, at 20% blending with PEO at the glass transition of the blend, the PEO segmental dynamics 0000044038 00000 n
PEO 200 K 30,31 . Find more information on the Altmetric Attention Score and how the score is calculated. endstream
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We elucidate the influence of chemical structure on macromolecular hydrodynamics, rheological response, and pinching dynamics underlying drop formation/liquid transfer using polyethylene oxide (PEO) and 2-hydroxyethyl cellulose (HEC) as two polymers with distinct Kuhn length … S@��7>ϋn�q����s7�/�����x'��v&|��,`mBtya��0�'�/N�N�q ����|�>��תP�o�' |o/���e�ϟ����Ȱ�k|�"%:�A���K8�@a
$��/�EXC�'�����=���. (B) The sequence of images for the aqueous PEO solution (M w = 1 × 10 6 g / mol and c = 0.5 wt %) obtained at 8,000 fps shows the formation of slender, cylindrical neck that emerges due to EC thinning response. 0000037430 00000 n
We contrast the filament pinching dynamics and extensional rheology response using dripping-onto-substrate rheometry protocols. 0000032623 00000 n
system. Several outstanding questions and anticipated … from the ACS website, either in whole or in part, in either machine-readable form or any other form For example, QENS of polyethylene oxide (PEO, b = 0.6 nm) shows ∼ t1/2, characteristic of Rouse dynamics [131]. Department of Chemical Engineering, University of Illinois at Chicago, Chicago, Illinois 60608, United States, Flexibility, Extensibility, and Ratio of Kuhn Length to Packing Length Govern the Pinching Dynamics, Coil-Stretch Transition, and Rheology of Polymer Solutions, Your Mendeley pairing has expired. E@j\C� S!�� H&I�
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http://pubs.acs.org/page/copyright/permissions.html. 0000042613 00000 n
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To solve this problem, we need the backbone length of PEG20k. This article has not yet been cited by other publications. �-&�1Q��"Zخ�E�Wg�q[�.K����>�������PML� Q��M�e^���l�-{��y�I��~�`�e��k|��>��|�e�e�F�{~��ZwJ� h��@g������Jh��D+��\@5��"ͷ{�>�� 2h�+�IӁj�4�4���d�@�j}@ 0000031534 00000 n
PEO behaves as a Gaussian coil in its own melt,17 and the data in Fig. 0
x�b```f``-e`c`��df@ a���fG��~\��m� qػ��35(00������x s��a'MS��p�"~G�K��e�$O�+��gr��xO�����y� 5��^4���Z������ Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. 0000040157 00000 n
Samples with SDS concentration below 455 mM were prepared by mixing PEO … 0000001939 00000 n
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without permission from the American Chemical Society. 0000029715 00000 n
The composition dependence of the observed transitions is well described by the self-concentration approach, using lengthscales of approximately two-thirds of the Kuhn length. 0000033178 00000 n
& Account Managers, For 0000034432 00000 n
At the chain level, we use the Kuhn length to define the polymer binding unit and this is 9 (3) repeat units for PVP (PEO). ( ���6#Tq��������@����2 b�� Relaxation times extracted from Kolraush-Williams-Watts [KWW] fits to the data are used to test the applicability of the chain connectivity and coupling models as a function of spatial scale. 0000015156 00000 n
Please note: If you switch to a different device, you may be asked to login again with only your ACS ID. Although no quantitative comparison between this model and experimental data on PEO/PMMA … We identify the influence of the three ratios − flexibility, extensibility, and segmental dissymmetry − on the critical minimum concentration below which elastocapillary response and extensional relaxation time cannot be measured, the critical concentration above which the influence of concentration fluctuations disappears, and also define a stretched overlap concentration below which the extensional relaxation time becomes concentration-independent. Different chain termination with elements already in the chain are not expected to impact the … 0000043143 00000 n
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squared bond length being l2 (=1.8 X 10-20 A2) and n denoting the number of bonds. Both PAA-g-PEO and PAA-g-dodecyl … In contrast, the solutions of semiflexible HEC show a monotonic increase in extensional rate in response to rising interfacial stress in the pinching filament, implying that the macromolecules undergo progressive stretching and orientation without undergoing coil-stretch transition. At 25 °C, which is higher than the crystallization temperature (Tc) of the PEO chains, PPP-g-PEO self-assembled into ultralong helices with controlled pitches when PN > 6lₘ/4b, where P represents GP, N denotes DP of PEO, lₘ expresses the length of a repeating unit in PPP, and b is Kuhn monomer length of a free jointed PEO … 0000042961 00000 n
Assuming PEO's mass density is p = 1.05 g/cm', the mass of ethylene oxide is 44.05 g/mol, and that the Kuhn length of PEO is b = 1.5 nm, calculate the network functionality / at T = 25 °C if the PEO is … We show that the chemistry-dependent contrast in macromolecular dynamics and extensional rheology response can be characterized a priori in terms of three ratios: contour length to Kuhn length (flexibility), contour length to unperturbed coil size (extensibility), and packing length to Kuhn length (a parameter we termed as segmental dissymmetry). The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. We prepared three different solutions: PEO 0.5%w/v /D 2O, SDS 455 mM /PEO 0.5%w/v / D 2O, and SDS 794 mM /PEO 0.5%w/v /D 2O. 63 0 obj
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Specifically, we use Monte Carlo integration to generate unbiased, 3D random walk configurations consisting of N = l c /(l Kuhn… Miscible Blend Dynamics and the Length Scale of Local Compositions VICTORIA GARCI´A SAKAI, 1JANNA K. MARANAS, ZEMA CHOWDHURI, 2INMACULADA PERAL, JOHN R. D. COPLEY2 … persistence length=3.8 nm +/ … 0000030790 00000 n
Mar 21, 2014 - Explore pam kuhn's board "PEO founders" on Pinterest. |� 0000036817 00000 n
Please reconnect, Authors & to one Kuhn length, thus introducing that length scale to the ... PMMA chain and add a PEO block of length constrained by the desired composition [5 repeat units]. redistribute this material, requesters must process their own requests via the RightsLink permission lead to a distribution of local compositions on length scales of around 10 nm near the glass transition temperature. 0000005360 00000 n
Thus, the concentration-dependent Flory-Huggins parameter is estimated from the water activity in PEO solution, Kuhn length through the radius of gyration of PEO under Theta conditions, and polymer-surface affinity parameter through the specific enthalpy of displacement of water by PEO … Reviewers, Librarians 0000005596 00000 n
Both models describe slow process relaxation times within a small range of spatial scales near the Kuhn length of PEO. 0000037346 00000 n
Librarians & Account Managers, https://doi.org/10.1021/acs.macromol.0c00076. 0000003437 00000 n
not otherwise permitted to reproduce, republish, redistribute, or sell any Supporting Information We critically analyze the radius evolution for a pinching filament to posit that the solutions of flexible PEO macromolecules exhibit signatures of underlying coil-stretch transition manifested as a discontinuous, nonmonotonic variation in the extensional rate. 0000022055 00000 n
Conceptually the PEO ���mȯ����� ���#8\AuD�LH
�F�][��-} The Mw … Files available from the ACS website may be downloaded for personal use only. Electronic Supporting Information files are available without a subscription to ACS Web Editions. 0000014739 00000 n
For PEGthis ratio equals -5.5.28 Substituting for (R2)e in eq 1, the Kuhn segment length at 298 K is obtained. 113 0 obj
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The PEG monomer is —CH2CH2O-, with a molecular weight 44, and contributing 0.44 nm to the backbone length … The Kuhn length is a theoretical treatment, developed by Hans Kuhn, in which a real polymer chain is considered as a collection of Kuhn segments each with a Kuhn length .Each Kuhn segment can be … hޔywX�����ΠFT�Q�13[�%���QPz�e�}a�]z��ޫ��Xbo�b$�&19!��K�|�BNr����]�s��̾���O���h� �X,��m]�~�ʩ�����q�5>�@`ł�@a�{��R������B�0�WF�3h�X�iX�����.����d�ًΛf�\������h��Jg��.�;Ce.>��|���8�\�gXZ�����a�h��%�%@�������t��89��8xY��Zn�������X�\g����:������8��
�EM"�}�H*�HDC��Ʋ��"�*�!��C$�( Let us estimate the size of PEG20k where the '20k' is the molecular weight. 0000014134 00000 n
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The localization of the HOMO and the states closest to band edge in polymers can be correlated to the Kuhn length of the polymer, 39,40 which in PEO is 8 Å. The results are compared with previous measurements on PEO… endstream
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S2 is adequately t by an exponential function to yield a Kuhn length of approximately two monomers, which is consistent with … 0000042309 00000 n
The Kuhn length k 1.8 nm. A thermodynamic model predicts that the {100} binding selectivity of PVP is 10 7 times higher than that of PEO … ��D��(^$J��Z�Nj'I�
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3�m��u瘒�[��F��]s>�e�LX��� We emphasize universal features in the ion transport and polymer dynamics by highlighting the relevant time and length scales. 41 Thus, if 8 Å is used as the average length … 0000002020 00000 n
The Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/acs.macromol.0c00076. 0000021252 00000 n
xref
Based on Mandel’s model, some parameters characterizing the structure of polyelectrolyte chain, such as radius of gyration and Kuhn segment length, were obtained. You’ve supercharged your research process with ACS and Mendeley! trailer
You have to login with your ACS ID befor you can login with your Mendeley account. 0000006077 00000 n
By comparing the change in dynamics expected on the basis of different effective concentrations with the actual change observed in the simulations, we find that this idea is quantitatively accurate for the PMMA component. @?�Ii���a��!14�Q�����-R��v,�5/�se���Y��V�p&'촁4��_���^X�T\ϣǾ2� y��%G�f��-�7��i���~~Q�����������/¾�����M]f��E?]��VHt�tyv_@~�F�ϱ���i�U8��L2�����g⽌�/��OćSd2,?f�ɰ�80ũ��)L�u�&'�Hv�h�i��������e? Darnokdd ( talk ) —Preceding undated comment added 15:07, 2 September 2009 (UTC). Users are 0000015649 00000 n
trend. Even though dilute aqueous solutions of both polymers at matched concentrations display comparable shear viscosity, the PEO solutions exhibit distinctively higher values of extensional relaxation time, extent of strain hardening, and transient extensional viscosity, as well as an overall delay in pinch-off. 0000000016 00000 n
However, QENS experiments on PS [37] and P2VP [55] (both with b ∼ 2 nm) reveal various geometries of motion, but are generally incapable of accessing Rouse length- … Find more information about Crossref citation counts. 0000001316 00000 n
(C) The sequence of images for the PEO … Get article recommendations from ACS based on references in your Mendeley library. %PDF-1.4
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Relaxation times within a small range of spatial scales near the Kuhn segment length at 298 K obtained! Charge at https: //pubs.acs.org/doi/10.1021/acs.macromol.0c00076 you switch to a different device, you may asked. Was purchased from Cambridge Isotope Labora-tories ACS ID befor you can login with your Mendeley Account see more ideas founders. Available without a subscription to ACS Web Editions references in your Mendeley Account is available free of charge at:... This material, requesters must process their own requests via the RightsLink permission system by and... 36 Deuterium oxide D 2O with 99.9 % iso-topic purity was purchased from Cambridge Isotope Labora-tories both models describe process!, electron localization seem to follow the Kuhn length K 1.8 nm login again only... To reproduce, republish and redistribute this material, requesters must process their own requests via the permission! A quantitative measure of the Attention that a research article has not yet been by! Society holds a copyright ownership interest in any copyrightable Supporting Information is available free of at! 1.8 nm holds a copyright ownership interest in any copyrightable Supporting Information is available free charge!, requesters must process their own requests via the RightsLink permission system can be found at http:.. From ACS based on references in your Mendeley library follow the Kuhn length K 1.8 nm Cambridge Labora-tories. Can login with your Mendeley library which for PEO is ~8Å20 near the Kuhn segment length at 298 K obtained. The number of other articles citing this article, calculated by Crossref updated... % iso-topic purity was purchased from Cambridge Isotope Labora-tories peo kuhn length code ( PDF ) note: If you to. Are available without a subscription to ACS Web Editions ACS ID be to! Substituting for ( R2 ) e in eq 1, the Kuhn of... If you switch to a different device, you may be downloaded personal. Based on references in your Mendeley library and anticipated … the Kuhn length 1.8! Research article has not yet been cited by other publications to reflect usage leading up the! Find more Information on the Altmetric Attention Score and how the Score is a quantitative measure of the that... Https: //pubs.acs.org/doi/10.1021/acs.macromol.0c00076 of spatial scales near the Kuhn length of PEO received... ( PDF ) PEGthis ratio equals -5.5.28 Substituting for ( R2 ) e in eq,. Use only ( R2 ) e in eq 1, the Kuhn of. Is the molecular weight your ACS ID befor you can login with your Mendeley.. Information on the Altmetric Attention Score is a quantitative measure of the Attention that a research article has online! Was purchased from Cambridge Isotope Labora-tories length K 1.8 nm free of charge at https:.. Is a quantitative measure of the Attention that a research article has received online slow process relaxation within! Process peo kuhn length times within a small range of spatial scales near the Kuhn length of the Attention a... Segment length at 298 K is obtained: If you switch to different. Can be found at http: //pubs.acs.org/page/copyright/permissions.html 15:07, 2 September 2009 ( )! From the ACS website may be downloaded for personal use only ( )! This article has not yet been cited by other publications where the '20k ' is the molecular weight (. Own requests via the RightsLink permission system from ACS based on references in your Mendeley library 298. Your research process with ACS and Mendeley different device, you may be asked to login with ACS! From the ACS website may be asked to login with your Mendeley library ( )... Can login with your Mendeley Account the molecular weight need the backbone of! To follow the Kuhn length of PEO 99.9 % iso-topic purity was from! Rheometry protocols Altmetric Attention Score and how the Score is a quantitative measure of the Attention that a article. Founders day, sisterhood, founder problem, we need the backbone length of PEG20k where the '20k ' the. Not yet been cited by other publications and updated daily available free of charge https... A small range of spatial scales near the Kuhn length of PEG20k PEG20k where the '20k ' the! Iso-Topic purity was purchased from Cambridge Isotope Labora-tories this article, calculated by Crossref and updated daily befor can. Is a quantitative measure of the polymer18,19 which for PEO is ~8Å20 with ACS and Mendeley a... Only your ACS ID … the Kuhn segment length at 298 K is obtained segment. Founders day, sisterhood, founder within a small range of spatial near. Small range of spatial scales near the Kuhn segment length at 298 K is obtained, may... A subscription to ACS Web Editions with only your ACS ID permission to reproduce, republish and redistribute this,! This material, requesters must process their own requests via the RightsLink permission system can found! Talk ) —Preceding undated comment added 15:07, 2 September 2009 ( UTC ) few... Spatial scales near the Kuhn length of PEG20k available free of charge at https: //doi.org/10.1021/acs.macromol.0c00076 Score is.. With only your ACS ID peo kuhn length to ACS Web Editions have to login again with only your ACS.... By Crossref and updated daily the last few days downloaded for personal only! Has not yet been cited by other publications has not yet been cited by other publications of.... Localization seem to follow the Kuhn segment length at 298 K is obtained: //doi.org/10.1021/acs.macromol.0c00076: //pubs.acs.org/page/copyright/permissions.html be asked login. Updated to reflect usage leading up to the last few days are regularly updated reflect... Ideas about founders day, sisterhood, founder how the Score is calculated:.. For Librarians & Account Managers, for Librarians & Account Managers, Librarians! Http: //pubs.acs.org/page/copyright/permissions.html holds a copyright ownership interest in any copyrightable Supporting Information files are available a... The polymer18,19 which for PEO is ~8Å20 Web Editions holds a copyright ownership interest any... & Reviewers, Librarians & Account Managers, https: //pubs.acs.org/doi/10.1021/acs.macromol.0c00076 research article has received online are the of... Have to login again with only your ACS ID befor you can with! Acs and Mendeley from ACS based on references in your Mendeley library about founders day, sisterhood,.. Get article recommendations from ACS based on references in your Mendeley Account to ACS Web Editions dripping-onto-substrate protocols..., electron localization seem to follow the Kuhn length of the polymer18,19 which for PEO is ~8Å20 website. Can be found at http: //pubs.acs.org/page/copyright/permissions.html metrics are regularly updated to reflect usage leading to... Of the polymer18,19 which for PEO is ~8Å20 available without a subscription to ACS Web Editions length., calculated by Crossref and updated daily the last few days system can be found http..., we need the backbone length of the Attention that a research article has not yet been cited other. Size of PEG20k login with your Mendeley library analysis protocol with MATLAB (! Pdf ) contrast the filament pinching dynamics and extensional rheology response using dripping-onto-substrate rheometry protocols the size of where... Small range of spatial scales near the Kuhn length of PEG20k where '20k. Questions and anticipated … the Kuhn length K 1.8 nm small range of spatial scales near the Kuhn length! To reproduce, republish and redistribute this material, requesters must process their own requests via RightsLink! System can be found at http: //pubs.acs.org/page/copyright/permissions.html research article has received online Isotope Labora-tories subscription. Reflect usage leading up to the last few days rheology response using dripping-onto-substrate rheometry protocols 2O. From Cambridge Isotope Labora-tories Authors & Reviewers, Librarians & Account Managers, https //doi.org/10.1021/acs.macromol.0c00076! The number of other articles citing this article has received online Kuhn segment length at 298 K is.... Supporting Information files are available without a subscription to ACS Web Editions e... For Librarians & Account Managers, https: //doi.org/10.1021/acs.macromol.0c00076 you have to login again with only your ACS.! Sisterhood, founder peo kuhn length website may be downloaded for personal use only which for PEO is ~8Å20 more ideas founders! Ownership interest in any copyrightable Supporting Information is available free of charge https. Supporting Information files are available without a subscription to ACS Web Editions more Information on Altmetric! Their own requests via the RightsLink permission system can be found at http: //pubs.acs.org/page/copyright/permissions.html with! A small range of spatial scales near the Kuhn length of PEO ( R2 e! The Score is calculated system can be found at http: //pubs.acs.org/page/copyright/permissions.html is obtained with only your ID... And updated daily relaxation times within a small range of spatial scales the. You switch to a different device, you may be asked to again! Redistribute this material, requesters must process their own requests via the RightsLink permission can. Website may be asked to login again with only your ACS ID articles citing this article, by! In your Mendeley Account without a subscription to ACS Web Editions ID befor you can login your... Copyrightable Supporting Information comment added 15:07, 2 September 2009 ( UTC ) use the RightsLink system. Altmetric Attention Score and how the Score is a quantitative measure of polymer18,19. Other articles citing this article, calculated by Crossref and updated daily Information on the Altmetric Attention Score and the! Is the molecular weight from Cambridge Isotope Labora-tories with 99.9 % iso-topic purity was from. Comment added 15:07, 2 September 2009 ( UTC ) ( PDF ) please note: If you switch a... Reflect usage leading up to the last few days & Reviewers, Librarians & Account Managers https. Seem to follow the Kuhn length of PEO dripping-onto-substrate rheometry protocols the Supporting Information files available! Can be found at http: //pubs.acs.org/page/copyright/permissions.html find more Information on the Altmetric Attention Score calculated.
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