Frustrated Crystallization in the Coupled Viscoelastic Phase Separation
Frustrated Crystallization in the Coupled Viscoelastic Phase Separation
复制标题
耦合粘弹性相分离中的受阻结晶
DOI:
10.1021/ma301592a
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发表时间:
2012-10
期刊:
影响因子:
5.5
通讯作者:
Charles C.Han
中科院分区:
文献类型:
--
作者:
Weichao Shi;Xu-Ming Xie;Charles C.Han
The interplay between crystallization and phase separation has been intensively studied recently. In this study, we extended the research into a dynamically asymmetric blend composed of amorphous poly(methyl methacrylate) (PMMA) and crystalline poly(ethylene oxide) (PEO). The large dynamic asymmetry induces network stress in concentration growth. We find that crystallization is seriously frustrated when it couples with a simultaneous viscoelastic phase separation. In a single quench experiment, normal spherulites grew in a limited temperature range when crystallization was faster, while crystallization was frustrated at deep quenches when phase separation was faster. In a double quench experiment, crystallization was more difficult to occur after the prior phase separation at a higher temperature. The calorimetric results indicated that both melting temperatures and enthalpies of crystallization decreased in the coupled viscoelastic phase separation. We propose that it is the network stress in the concent...
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影响因子:
5.5
作者:
Xiaohua Zhang;Zhigang Wang;C. Han
通讯作者:
Xiaohua Zhang;Zhigang Wang;C. Han
影响因子:
8.6
作者:
Hajime Tanaka;Takeaki Araki
通讯作者:
Hajime Tanaka;Takeaki Araki
DOI:
10.1021/ma102596b
发表时间:
2011-02
期刊:
Bulletin of the American Physical Society
影响因子:
--
作者:
H. Watanabe;Quan Chen;Yohji Kawasaki;Yumi Matsumiya;Tadashi Inoue;O. Urakawa
通讯作者:
H. Watanabe;Quan Chen;Yohji Kawasaki;Yumi Matsumiya;Tadashi Inoue;O. Urakawa
影响因子:
5.5
作者:
Jiang Du;H. Niu;Jin‐Yong Dong;Xia Dong;Dujing Wang;and Aihua He;C. Han
通讯作者:
Jiang Du;H. Niu;Jin‐Yong Dong;Xia Dong;Dujing Wang;and Aihua He;C. Han
DOI:
10.1021/jp061159m
发表时间:
2006-06
期刊:
The journal of physical chemistry. B
影响因子:
--
作者:
R. Matkar;T. Kyu
通讯作者:
R. Matkar;T. Kyu