Citation: Miao-miao Zhang, Li-yun Zha, Huan-huan Gao, Yi-jing Nie, Wen-bing Hu. How Polydispersity of Network Polymers Influences Strain-induced Crystal Nucleation in a Rubber[J]. Chinese Journal of Polymer Science, ;2014, 32(9): 1218-1223. doi: 10.1007/s10118-014-1495-9 shu

How Polydispersity of Network Polymers Influences Strain-induced Crystal Nucleation in a Rubber

1.
Department of Polymer Science and Engineering, State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China

Corresponding author: Wen-bing Hu,
Received Date: 26 March 2014
Revised Date: 21 April 2014

Fund Project: This work was financially supported by the National Natural Science Foundation of China (Nos. 20825415 and 21274061), National Basic Research Program of China (No. 2011CB606100) and Program for Changjiang Scholars and Innovative Research Teams in Universities. The support from Anhui Tong Feng Electronics Corporation is also appreciated.

Network polymers in a rubber or a gel often contain non-uniform chain lengths. By means of dynamic Monte Carlo simulations of polymer mixtures with various compositions of two chain lengths, we investigated how the factor of polydispersity influences their strain-induced crystal nucleation. Under a high temperature and a high strain rate, the stretching of both polymers revealed that crystal nucleation is mainly accelerated by the presence of short-chain polymers; nevertheless, both polymers join together in the nucleation process. Further analysis proved that crystal nucleation is initiated from those highly stretched short segments, which are rich on the short-chain polymers.
- Crystallization,
- Rubber,
- Polydispersity,
- Molecular simulation
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