Do Deviations from Reptation Scaling of Entangled Polymer Melts Result from Single- or Many-Chain Effects?

by: Chen Y Liu, Roland Keunings, Christian Bailly

Physical Review Letters, Vol. 97, No. 24. (2006)

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Abstract

By studying the relaxation of small amounts of short entangled “probe” chains in a high molecular weight matrix, we show that the deviations from reptation scaling of the longest relaxation time are not as much dominated by single-chain effects (usually referred to as contour length fluctuations or CLF) as assumed by current mesoscopic models but also originate to a very significant extent from mutual chain relaxation effects. This result is in fact consistent with literature data on tracer and self-diffusion. Moreover, tube theories also overpredict the influence of CLF on the plateau modulus. Improved theories, simulations, and careful experiments are urgently needed to resolve this important question.

@article{liu06, abstract = {By studying the relaxation of small amounts of short entangled “probe” chains in a high molecular weight matrix, we show that the deviations from reptation scaling of the longest relaxation time are not as much dominated by single-chain effects (usually referred to as contour length fluctuations or CLF) as assumed by current mesoscopic models but also originate to a very significant extent from mutual chain relaxation effects. This result is in fact consistent with literature data on tracer and self-diffusion. Moreover, tube theories also overpredict the influence of CLF on the plateau modulus. Improved theories, simulations, and careful experiments are urgently needed to resolve this important question.}, author = {Liu, Chen Y. and Keunings, Roland and Bailly, Christian }, citeulike-article-id = {1153438}, doi = {10.1103/PhysRevLett.97.246001}, journal = {Physical Review Letters}, keywords = {blend, constraint, linear, probe, release, reptation}, number = {24}, posted-at = {2008-05-30 20:08:17}, priority = {2}, publisher = {APS}, title = {Do Deviations from Reptation Scaling of Entangled Polymer Melts Result from Single- or Many-Chain Effects?}, url = {http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal\&id=PRLTAO000097000024246001000001\&idtype=cvips\&gifs=yes}, volume = {97}, year = {2006} }

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TY - JOUR ID - liu06 L3 - citeulike-article-id:1153438 TI - Do Deviations from Reptation Scaling of Entangled Polymer Melts Result from Single- or Many-Chain Effects? JF - Physical Review Letters VL - 97 IS - 24 PB - APS N2 - By studying the relaxation of small amounts of short entangled “probe” chains in a high molecular weight matrix, we show that the deviations from reptation scaling of the longest relaxation time are not as much dominated by single-chain effects (usually referred to as contour length fluctuations or CLF) as assumed by current mesoscopic models but also originate to a very significant extent from mutual chain relaxation effects. This result is in fact consistent with literature data on tracer and self-diffusion. Moreover, tube theories also overpredict the influence of CLF on the plateau modulus. Improved theories, simulations, and careful experiments are urgently needed to resolve this important question. KW - blend KW - constraint KW - linear KW - probe KW - release KW - reptation AU - Liu, Chen AU - Keunings, Roland AU - Bailly, Christian PY - 2006/// UR - http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PRLTAO000097000024246001000001&idtype=cvips&gifs=yes ER -

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