Reentanglement Kinetics of Freeze-Dried Polymers above the Glass Transition Temperature

被引：63

作者：

Teng, Chao ^{[1
]}

Gao, Yun ^{[1
]}

Wang, Xiaoliang ^{[1
]}

Jiang, Wei ^{[1
]}

Zhang, Chen ^{[1
]}

Wang, Rong ^{[1
]}

Zhou, Dongshan ^{[1
]}

Xue, Gi ^{[1
]}

机构：

[1] Nanjing Univ, Dept Polymer Sci & Engn, Sch Chem & Chem Engn, State Key Lab Coordinat Chem,Nanjing Natl Lab Mic, Nanjing 210093, Jiangsu, Peoples R China

来源：

MACROMOLECULES | 2012年 / 45卷 / 16期

关键词：

LARGE SHEARING DEFORMATIONS; ENTANGLED POLYMER; POLYBUTADIENE SOLUTIONS; LINEAR POLYMER; POLYSTYRENE; DYNAMICS; BEHAVIOR; INTERPENETRATION; CONFINEMENT; GLOBULES;

D O I：

10.1021/ma300885w

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Rheology experiments were performed to monitoring the kinetics of the entanglement recovery process of freeze-dried polystyrene. Complete reentanglement time requires unexpected long time, which does not monotonically reduce with the concentration of precursor solution. The entanglement recovery was treated as the complementary process of stress relaxation in Doi-Edwards model and was found to agree well with the exponential law. We clarified that freeze-drying is an effective way to achieve disentanglement for polymer chains. The correlation between recovery time and the concentration of precursor solution is in good agreement with previous results from molecular dynamics (MD) simulations.

引用

页码：6648 / 6651

页数：4

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