Multiple stage crystallization of gamma phase poly(vinylidene fluoride) induced by ion-dipole interaction as revealed by time-resolved FTIR and two-dimensional correlation analysis》.pdf

Polymer 55 (2014) 4765e4775 Contents lists available at ScienceDirect Polymer journal homepage: www.elsevi /locate/polymer Multiple stage crystallization of gamma phase poly(vinylidene fluoride) induced by ion-dipole interaction as revealed by time- resolved FTIR and two-dimensional correlation analysis Yue Li a, Jia-Zhuang Xu a, Lei Zhu c, Huan Xu a, Ming-Wang Pan b, Gan-Ji Zhong a, *, Zhong-Ming Li a, * a College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, Sichuan, Peoples Republic of China b Institute of Polymer Science and Engineering, Hebei University of Technology, Tianjin 300130, Peoples Republic of China c Department of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, OH 44106-7202, USA a r t i c l e i n f o a b s t r a c t Article history: The polymorphic g poly(vinylidene fluoride) (PVDF) induced by an ionic surfactant, cetyltrimethyl Received 2 April 2014 ammonium bromide (CTAB), is studied by using time-resolved Fourier transform infrared (FTIR) and Received in revised form two-dimensional (2D) correlation analysis. It is found that an extremely low content of CTAB can 26 June 2014 effectively induce g PVDF due to the existence of strong ion-dipole interactions. Five stages are identified Accepted 15 July 2014 and intensive information on the growth and phase transition of a and