Effect of Branching Architecture on Glass Transition Behavior of Hyperbranched Copolystyrenes: the Experiment and Simulation Studies

Xiang Luo; Shi-jie Xie; Wei Huang; Bo-na Dai; Zhong-yuan Lu; De-yue Yan

doi:10.1007/s10118-016-1730-7

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Effect of Branching Architecture on Glass Transition Behavior of Hyperbranched Copolystyrenes: the Experiment and Simulation Studies

Updated：2021-06-21

- Effect of Branching Architecture on Glass Transition Behavior of Hyperbranched Copolystyrenes: the Experiment and Simulation Studies
- Effect of Branching Architecture on Glass Transition Behavior of Hyperbranched Copolystyrenes: the Experiment and Simulation Studies
- Chinese Journal of Polymer Science 2016年34卷第1期页码：77-87
- Affiliations：
  
  a.School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China
  b.Institute of Theoretical Chemistry, State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun 130021, China
  c.Instrumental Analysis Center, Shanghai Jiao Tong University, Shanghai 200240, China
- Author bio：
  
  **Wei Huang (黄卫), E-mail: hw66@sjtu.edu.cn
  Zhong-yuan Lu (吕中元), E-mail: luzhy@jlu.edu.cn
- Funds：
  
  National Basic Research Program(2012CB821500;2013CB834506);National Natural Science Foundation of China(91127047;21174086;21274167)
- DOI：10.1007/s10118-016-1730-7
  中图分类号：
- 收稿：2015-07-03，
  
  修回：2015-08-16，
  
  录用：2015-08-23，
  
  纸质出版：2016-01
- Accepted：
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Xiang Luo, Shi-jie Xie, Wei Huang, 等. Effect of Branching Architecture on Glass Transition Behavior of Hyperbranched Copolystyrenes: the Experiment and Simulation Studies[J]. Chinese Journal of Polymer Science, 2016,34(1):77-87.

Xiang Luo, Shi-jie Xie, Wei Huang, et al. Effect of Branching Architecture on Glass Transition Behavior of Hyperbranched Copolystyrenes: the Experiment and Simulation Studies[J]. Chinese Journal of Polymer Science, 2016, 34(1): 77-87.
Xiang Luo, Shi-jie Xie, Wei Huang, 等. Effect of Branching Architecture on Glass Transition Behavior of Hyperbranched Copolystyrenes: the Experiment and Simulation Studies[J]. Chinese Journal of Polymer Science, 2016,34(1):77-87. DOI： 10.1007/s10118-016-1730-7.

Xiang Luo, Shi-jie Xie, Wei Huang, et al. Effect of Branching Architecture on Glass Transition Behavior of Hyperbranched Copolystyrenes: the Experiment and Simulation Studies[J]. Chinese Journal of Polymer Science, 2016, 34(1): 77-87. DOI： 10.1007/s10118-016-1730-7.

摘要

Abstract

By controlling the feed ratio of CMS/styrene and the polymerization time

a series of hyperbranched copolystyrenes (HBCPS) were synthesized with comparable weight-averaged molecular weights (

) but different degree of branching (DB) through atom transfer radical self-condensing vinyl copolymerization (ATR-SCVCP) with CuBr/2

2¢- bipyridyl as the catalyst. The resulting HBCPS samples were used to investigate the effect of branching architecture on their glass transition behavior. With the DB increased

the glass transition temperatures (

) of HBCPS samples measured by DMA and DSC both decreased. Their spin-lattice relaxation times (

) of protons displayed the same downtrend with increasing DB. Besides

a correlation between the

s and the DB was well established by all-atom molecular dynamics (MD) simulations. The values of MD-determined

s are little higher than the corresponding experimental ones. However

the dependence of

s on DB is in good agreement with the experimental results

i.e

decreases both in experiments and simulations with increasing DB.

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