POLYMER-CHAIN DIMENSIONS AND THE DEPENDENCE OF VISCOELASTIC PROPERTIES ON CONCENTRATION, MOLECULAR-WEIGHT AND SOLVENT POWER
POLYMER-CHAIN DIMENSIONS AND THE DEPENDENCE OF VISCOELASTIC PROPERTIES ON CONCENTRATION, MOLECULAR-WEIGHT AND SOLVENT POWER
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DOI：
10.1016/0032-3861(80)90266-9
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发表时间：
1980-01-01
期刊：
影响因子：
4.6
通讯作者：
GRAESSLEY, WW
中科院分区：
文献类型：
--
作者：
GRAESSLEY, WW
在良好的溶剂中的链尺寸的聚合物浓度的影响进行了讨论，以确定半稀释和浓缩制度之间的边界。根据Edwards和de Gennes的筛选原理，对于许多体系，在聚合物体积分数为0.05-0.20的范围内，链尺寸似乎应接近其未扰动值，而与分子量无关。从这些结果中，我们提出了一种方法，考虑到收缩的尺寸与浓度的半稀释区域中的粘弹性相关。我们还建议使用浓度-分子量图来区分粘弹性行为的几个区域。
The effects of polymer concentration on chain dimensions in good solvents is discussed in order to define the boundary between the semi-dilute and concentrated regimes. Based upon the screening principle of Edwards and de Gennes, it appears that chain dimensions should approach their unperturbed values for many systems at polymer volume fractions in the range of 0.05–0.20, independent of molecular weight. From these results we propose a method for correlating viscoelastic properties in the semi-dilute region which takes into account the contraction of dimensions with concentration. We also suggest the use of a concentration-molecular weight diagram to distinguish the several regions of viscoelastic behaviour.