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《高分子科学(英文版)》 2016-01
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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;School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites,Shanghai Jiao Tong University;Institute of Theoretical Chemistry, State Key Laboratory of Supramolecular Structure and Materials,Jilin University;Instrumental Analysis Center, Shanghai Jiao Tong University;  
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(Mw) but different degree of branching(DB) through atom transfer radical self-condensing vinyl copolymerization(ATR-SCVCP) with Cu Br/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(Tg) of HBCPS samples measured by DMA and DSC both decreased. Their spin-lattice relaxation times(1H T1r) of protons displayed the same downtrend with increasing DB. Besides, a correlation between the Tgs and the DB was well established by all-atom molecular dynamics(MD) simulations. The values of MD-determined Tgs are little higher than the corresponding experimental ones. However, the dependence of Tgs on DB is in good agreement with the experimental results, i.e., Tg decreases both in experiments and simulations with increasing DB.
【Fund】: financially supported by the National Basic Research Program(Nos.2012CB821500 and 2013CB834506);; the National Natural Science Foundation of China(Nos.91127047;21174086 and 21274167)
【CateGory Index】: TQ317
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【Citations】
Chinese Journal Full-text Database 2 Hits
1 Jiang-wei Zhao,Han Zhu,Yi-xian Wu~(**),Wei-wei Zhou,Guan-ying Wu and Ri-wei Xu State Key Laboratory of Chemical Resource Engineering,Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials,Beijing University of Chemical Technology,Beijing 100029,China;EFFECTS OF CHAIN MICROSTRUCTURE OF BUTADIENE-ISOPRENE COPOLYMERS ON THEIR GLASS TRANSITION AND CRYSTALLIZATION[J];高分子科学(英文版);2010-04
2 Li-bin Bai;Kun Zhao;Yong-gang Wu;Wen-liang Li;Su-juan Wang;Hai-jun Wang;Xin-wu Ba;Hong-chi Zhao;College of Chemistry & Environmental Science,Hebei University;;A New Method for Synthesizing Hyperbranched Polymers with Reductive Groups Using Redox/RAFT/SCVP[J];高分子科学(英文版);2014-04
【Co-citations】
Chinese Journal Full-text Database 3 Hits
1 Qing-fei Zhang;Xiu-bo Jiang;Ai-hua He;Key Laboratory of Rubber-Plastics (Ministry of Education)/Shandong Provincial, Key Laboratory of Rubber-Plastics,School of Polymer Science and Engineering, Qingdao University of Science and Technology;;Synthesis and Characterization of trans-1,4-Butadiene/Isoprene Copolymers: Determination of Monomer Reactivity Ratios and Temperature Dependence[J];高分子科学(英文版);2014-08
2 SUN Feng-xia;PENG Xia-yu;KANG Li-chao;LU Chun-xia;LUO Rui-feng;LUO Xiao-ling;Analysis and Testing Center,Xinjiang Academy of Agriculture and Reclamation Science;Supervision and Testing Center Food Quality,Ministry of Agriculture;Department of Scientific Research,Xinjiang Academy of Agriculture and Reclamation Science;;Overview of the synthesis of hyperbranched polymers[J];Thermosetting Resin;2015-03
3 Guo Ruiwei;Zhang Mingfeng;Zhang Jianhua;School of Chemical Engineering and Technology,Tianjin University;;Synthesis of Hyperbranched Macro RAFT Agent and Its Application to RAFT Polymerization[J];Journal of Tianjin University(Science and Technology);2015-05
【Secondary Citations】
Chinese Journal Full-text Database 1 Hits
1 GUO Chunling, ZHOU Zinan and GONG Zhi(Changchun Institute of Applied Chemistry, Academia Sinica, Changchun 130022);STUDY OF THE MONOMER REACTIVITY RATIOS AND THE SEQUENCE DISTRIBUTION IN BUTADIENE-ISOPRENE COPOLYMERS BY 13C-NMR SPECTROMETRY[J];Acta Polymerica Sinica;1991-01
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