Determination of the molecular weight distribution of entangled linear polymers from linear viscoelasticity data Export

@article{vanruymbeke02b, abstract = {In a companion paper [Macromolecules 35 (2002) 2689], we have addressed the direct problem of predicting the linear viscoelastic response of entangled linear polymers from their molecular weight distribution, using a suitable model inspired by reptation theory. By comparing the theoretical results to experimental data for a variety of samples of different nature (polystyrene, polycarbonate, high-density polyethylene) and distribution (monomodal and multimodal), we found that the time-dependent diffusion reptation model proposed by des Cloizeaux, suitably modified to treat short chains and to include Rouse processes, is capable of quantitative predictions. In the present paper, we use the modified des Cloizeaux model to address the inverse problem of predicting molecular weight distribution from dynamic moduli. A parametric approach is implemented to deal with the ill-posedness of the problem. Results are given for most of the samples studied in [Macromolecules 35 (2002) 2689]. They are in quantitative agreement with size-exclusion chromatography data. In particular, the proposed methodology is able to resolve small amounts of short chains in bimodal blends containing large amounts of long chains.}, author = {van Ruymbeke, Evelyne and Keunings, Roland and Bailly, Christian}, citeulike-article-id = {809435}, citeulike-linkout-0 = {http://dx.doi.org/10.1016/S0377-0257(02)00080-0}, citeulike-linkout-1 = {http://linkinghub.elsevier.com/retrieve/pii/S0377-0257(02)00080-0}, citeulike-linkout-2 = {http://www.sciencedirect.com/science/article/B6TGV-46HFY3H-4/2/60b57f33d236e6d0acab67fde3112297}, day = {15}, doi = {10.1016/S0377-0257(02)00080-0}, journal = {Journal of Non-Newtonian Fluid Mechanics}, keywords = {chains, linear, mwe, rheology}, month = {August}, number = {2-3}, pages = {153--175}, posted-at = {2007-12-19 17:22:16}, priority = {2}, title = {Determination of the molecular weight distribution of entangled linear polymers from linear viscoelasticity data}, url = {http://dx.doi.org/10.1016/S0377-0257(02)00080-0}, volume = {105}, year = {2002} }

TY - JOUR ID - vanruymbeke02b L3 - citeulike-article-id:809435 N2 - In a companion paper [Macromolecules 35 (2002) 2689], we have addressed the direct problem of predicting the linear viscoelastic response of entangled linear polymers from their molecular weight distribution, using a suitable model inspired by reptation theory. By comparing the theoretical results to experimental data for a variety of samples of different nature (polystyrene, polycarbonate, high-density polyethylene) and distribution (monomodal and multimodal), we found that the time-dependent diffusion reptation model proposed by des Cloizeaux, suitably modified to treat short chains and to include Rouse processes, is capable of quantitative predictions. In the present paper, we use the modified des Cloizeaux model to address the inverse problem of predicting molecular weight distribution from dynamic moduli. A parametric approach is implemented to deal with the ill-posedness of the problem. Results are given for most of the samples studied in [Macromolecules 35 (2002) 2689]. They are in quantitative agreement with size-exclusion chromatography data. In particular, the proposed methodology is able to resolve small amounts of short chains in bimodal blends containing large amounts of long chains. IS - 2-3 JF - Journal of Non-Newtonian Fluid Mechanics EP - 175 TI - Determination of the molecular weight distribution of entangled linear polymers from linear viscoelasticity data VL - 105 SP - 153 KW - chains KW - linear KW - mwe KW - rheology AU - van Ruymbeke, Evelyne AU - Keunings, Roland AU - Bailly, Christian PY - 2002/08/15/ UR - http://dx.doi.org/10.1016/S0377-0257(02)00080-0 ER -