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
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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.
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