Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2011, Vol. 22 ›› Issue (1): 25-29 doi: 10.13538/j.1001-8042/nst.22.25-29

• RADIOCHEMISTRY, RADIOPHARMACEUTICALS AND NUCLEAR MEDICIN • Previous Articles     Next Articles

Determining the degree of grafting for poly(vinylidene fluoride) graft-copolymers using fluorine elemental analysis

YU Yang1,2 ZHANG Bowu1,2 YANG Xuanxuan1,2 DENG Bo1 LI Linfan1 YU Ming1 LI Jingye1,∗   

  1. 1Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China 2Graduate University of Chinese Academy of Sciences, Beijing 100049, China
YU Yang, ZHANG Bowu, YANG Xuanxuan, DENG Bo, LI Linfan, YU Ming, LI Jingye. Determining the degree of grafting for poly(vinylidene fluoride) graft-copolymers using fluorine elemental analysis.Nuclear Science and Techniques, 2011, 22(1): 25-29     doi: 10.13538/j.1001-8042/nst.22.25-29

Abstract:

Acrylic acid (AAc) and styrene (St) were grafted onto poly(vinylidene fluoride) (PVDF) powder or membrane samples by pre-irradiation graft copolymerization. The grafted chains were proved by FT-IR spectroscopy analysis. The degree of grafting (DG) of the grafted PVDF was determined by fluorine elemental analysis (FEA) method, and was compared with the DGs determined by weighing method, acid-base back titration method and quantitative FT-IR method. The results show that the FEA method is accurate, convenient and universal, especially for the grafted polymer powders.

Key words: Fluorine elemental analysis, Degree of grafting, Poly(vinylidene fluoride), Pre-irradiation graft copolymerization