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

RADIOCHEMISTRY, RADIOPHARMACEUTICALS AND NUCLEAR MEDICINE

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

YU Yang，

ZHANG Bowu，

YANG Xuanxuan，

DENG Bo，

LI Linfan，

YU Ming，

LI Jingye

Nuclear Science and Techniques

Vol.22, No.1

pp.25-29

Published in print 20 Feb 2011

DOI：10.13538/j.1001-8042/nst.22.25-29

60301

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.

Fluorine elemental analysisDegree of graftingPoly(vinylidene fluoride)Pre-irradiation graft copolymerization

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