Citation: Qi-hua Zhou, Zhi-yun Li, Hua-qing Liang, Yong-jiang Long, Qing Wu, Hai-yang Gao, Guo-dong Liang, Fang-ming Zhu. Crystallization-driven Self-assembly of Isotactic Polystyrene in N, N-Dimethylformamide[J]. Chinese Journal of Polymer Science, ;2015, 33(4): 646-651. doi: 10.1007/s10118-015-1615-1 shu

Crystallization-driven Self-assembly of Isotactic Polystyrene in N, N-Dimethylformamide

Qi-hua Zhou ¹ ,
Zhi-yun Li ¹ ,
Hua-qing Liang ¹ ,
Yong-jiang Long ¹ ,
Qing Wu ^2,3,4 ,
Hai-yang Gao ^2,3,4 ,
Guo-dong Liang ^2,3,4 ,
Fang-ming Zhu ^2,3,4

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.
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
3.
2. DSAPM Lab, Institute of polymer Science, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, China
4.

Received Date: 13 August 2014
Revised Date: 12 September 2014

Fund Project: This work was financially supported by the National Natural Science Foundation of China (Nos. 21174167 and 20974123), the Guangdong Province Higher School Science and Technology Innovation Key Project and the Natural Science Foundation of Guangdong Province (No. S2013030013474).

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.
- Isotactic polystyrene,
- N, N-Dimethylformamide,
- Crystallization-driven,
- Self-assembly
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