title: Local Grafting of Ionic Liquid in Poly(vinylidene fluoride) Amorphous Region and the Subsequent Microphase Separation Behavior in Melt.
abstract: Polymer-based nanostructures can be generally created by self-assembly of block copolymers that are commonly synthesized by living radical polymerization. In this study, a new strategy is proposed to fabricate block-like copolymers by using the template of binary phase structure of semicrystalline polymers. Poly(vinylidene fluoride) (PVDF) is thermodynamically miscible with an unsaturated ionic liquid (IL) (1-vinyl-3-ethylimidazolium tetrafluoroborate) in the melt and IL molecules are expelled out from the crystalline parts during the crystallization of PVDF. Therefore, the IL molecules are only located at the amorphous region of PVDF crystals. The electron beam irradiation of the IL incorporated PVDF leads to the local grafting of IL molecules onto the PVDF molecular chains in the amorphous region, so block-like grafting polymer chains of crystalline PVDF-b-(amorphous PVDF-g-IL)-b-crystalline PVDF can be achieved. The subsequent heating of the irradiated sample induces the microphase separation of PVDF-g-IL from the ungrafted PVDF chains.
authors.affiliation: College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, No. 16 Xuelin Rd, Hangzhou, 310036, P. R. China.|CAS Center for Excellence on TMSR Energy System, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, No. 2019 Jialuo Road, Jiading District, Shanghai, 201800, P. R. China.|University of Chinese Academy of Sciences, Beijing, 100049, P. R. China.
authors.forename: Chenyang
authors.initials: C
authors.lastname: Xing
authors.affiliation: CAS Center for Excellence on TMSR Energy System, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, No. 2019 Jialuo Road, Jiading District, Shanghai, 201800, P. R. China.
authors.forename: Jingye
authors.initials: J
authors.lastname: Li
authors.affiliation: Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201204, P. R. China.
authors.forename: Chunming
authors.initials: C
authors.lastname: Yang
authors.affiliation: College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, No. 16 Xuelin Rd, Hangzhou, 310036, P. R. China. yongjin-li@hznu.edu.cn.
authors.forename: Yongjin
authors.initials: Y
authors.lastname: Li
mesh_terms: D003460:Crystallization; D052578:Ionic Liquids / Q000737:chemistry*; D010316:Particle Size; D011145:Polyvinyls / Q000737:chemistry*; D013499:Surface Properties; D013816:Thermodynamics; D005465:Fluorocarbon Polymers
chemical_list: D052578:Ionic Liquids; D011145:Polyvinyls; C024865:polyvinylidene fluoride; D005465:Fluorocarbon Polymers
keywords: block-like copolymers; crystalline template; locally grafting; microphase separation