文献类型：期刊文献

英文题名：Linear and nonlinear viscoelasticity of self-associative hydrogen-bonded polymers

作者：Hong, Wei[1];Lin, Jiaping[1];Tian, Xiaohui[1];Wang, Liquan[1]

机构：[1]East China Univ Sci & Technol, Frontiers Sci Ctr Materiobiol & Dynam Chem, Sch Mat Sci & Engn,Key Lab Ultrafine Mat,Minist E, Shanghai Key Lab Adv Polymer Mat, Shanghai 200237, Peoples R China

年份：2021

卷号：235

外文期刊名：POLYMER

收录：;EI(收录号：20214311078231);WOS:【SCI-EXPANDED(收录号:WOS:000718165000004)】；

基金：This work was supported by the National Natural Science Foundation of China (51833003, 21774032, 21975073, 22173030, and 51621002).

语种：英文

外文关键词：Viscoelasticity; Hydrogen bond; Dissipative particle dynamics

摘要：We conducted a nonequilibrium dissipative particle dynamics simulation on the linear and nonlinear viscoelastic behaviors of polymer melt associated with hydrogen bonds. The effects of the number of hydrogen bonding groups and the strength of hydrogen bonding on viscoelasticity were examined. The simulation results show that the polymers with strongly associating hydrogen bonds exhibit supramolecular networks, and their motion displays some similarities to that of polymer melts following the Reptation model. The strain hardening is due to the strain-induced stretching of polymer chains in the supramolecular networks. The number and lifetime of hydrogen bonding have a combined impact on the dynamic and linear viscoelastic behaviors of self-associative polymers. The storage moduli increase linearly with increasing the numbers of hydrogen bonding groups as the lifetime of hydrogen bonds is comparable to or larger than the relaxation time of polymer chains. In contrast, hydrogen bonding has a less pronounced influence on the dynamics and viscoelasticity as the lifetime of hydrogen bonds is minimal. The results are closely aligned with the experimental findings and provide a deep insight into the viscoelasticity of self-associative polymers via hydrogen bonds.