Crystallization-driven self-assembly of isotactic polystyrene in N, N-dimethylformamide

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• 作者：Qi-hua Zhou (1)
  Zhi-yun Li (1)
  Hua-qing Liang (1)
  Yong-jiang Long (1)
  Qing Wu (1) (2)
  Hai-yang Gao (1) (2)
  Guo-dong Liang (1) (2)
  Fang-ming Zhu 绁濇柟鏄?/a> (1) (2)
  
  1. Key Lab for Polymer Composites and Functional Materials of Ministry of Education ; School of Chemistry and Chemical Engineering ; Sun Yat-Sen University ; Guangzhou ; 510275 ; China
  2. DSAPM Lab ; Institute of polymer Science ; School of Chemistry and Chemical Engineering ; Sun Yat-Sen University ; Guangzhou ; 510275 ; China
  
• 关键词：Isotactic polystyrene ; N ; N ; Dimethylformamide ; Crystallization ; driven ; Self ; assembly
• 刊名：Chinese Journal of Polymer Science
• 出版年：2015
• 出版时间：April 2015
• 年：2015
• 卷：33
• 期：4
• 页码：646-651
• 全文大小：921 KB
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• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Condensed Matter Physics
  Industrial Chemistry and Chemical Engineering
  Polymer Sciences
  Characterization and Evaluation of Materials
  
• 出版者：Chinese Chemical Society and Institute of Chemistry, CAS, co-published with Springer
• ISSN：1439-6203

文摘

Herein we demonstrate crystallization-driven self-assembly of isotactic polystyrene (iPS) with high isotacticity and narrow molecular weight distribution and crystallization-induced switching of the morphology of iPS aggregates in N, N-dimethylformamide (DMF). The formation and morphology switching of the self-assembled aggregates of iPS are investigated by means of dynamic light scattering (DLS), scanning electron microscopy (SEM), differential scanning calorimetry (DSC) and wide angle X-ray diffraction (WXRD). The results reveal that cooling DMF solution of iPS promotes iPS chains to self-assemble into spherical aggregates with a gelled core cross-linked by microcrystals, which is surrounded by solvent-swollen corona. Furthermore, crystallization induces the deformation of iPS aggregates from spherical to plate-like or nest-like.