Synthesis and structure of amphiphilic poly(vinylidene fluoride)-b-poly(N-vinylpyrrolidone) block copolymers

HUANG Zhihui1 LIU Jinchao2 BAO Yongzhong1

(1.State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, Zhejiang, China 310027)
(2.Juhua Group Technology Center, Quzhou, Zhejiang, China 324004)

【Abstract】Iodine terminated poly(vinylidene fluoride) was prepared by iodine transfer emulsion polymerization using C6F13I as a chain transfer agent, and further employed to mediate the iodine transfer solution polymerizaton of N-vinylpyrrolidone to prepare amphiphilic poly(vinylidene fluoride)-b-poly(N-vinylpyrrolidone) (PVDF-b-PVP) block copolymers. The molecular and phase structures of PVDF-b-PVP copolymers were characterized by NMR, IR, XRD, DSC and AFM. It was confirmed that PVP block could be effectively inserted between PVDF block and terminated iodine. The order of PVDF chains in the block copolymers was decreased after the incorporation of PVP, resulting in the formation of more γ phase PVDF crystals, and the decrease of crystallization temperature and crystallinity degree of PVDF. PVDF-b-PVP copolymers were microphase-separated with a domain size of about 20 nm, and exhibited better hydrophilicity than PVDF homopolymer.

【Keywords】 polymer; synthesis; crystallization; poly(vinylidene fluoride) ; poly(N-vinylpyrrolidone) ; block copolymer;

【DOI】

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(Translated by WANG YX)

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This Article

ISSN:0438-1157

CN: 11-1946/TQ

Vol 69, No. 02, Pages 823-829+885

February 2018

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Article Outline

Abstract

  • Introduction
  • 1 Experimental section
  • 2 Results and discussion
  • 3 Conclusion
  • References