Concentric Ring Pattern Formation in a Competing Crystallization and Phase Separation Process
作者：Weichao Shi; He Cheng; Fenghua Chen; Yongri Liang; Xuming Xie; Charles C. Han*
关键字：concentric ring pattern, crystallization induced phase separation
论文来源：期刊
具体来源：Macromol. Rapid Commun. 32, 1886-1890, 2011.
发表时间：2011年
Spherulitic patterns usually form in the single process of crystallization in polymer blends.
But when phase separation intervenes under deep quench, the radial growth of the initial
spherulitic patterns tends to invert into concentric alternating crystalline-/amorphous-rich
ring structures. Within crystalline-rich regions, lateral lamellae orient in the tangential direction rather than in the usual radial direction. We demonstrate the determining factor for this first observed phenomenon is the concentration deviation enhanced phase separation dynamics at the growth interface of crystals.