Journal of Radiation Research and Radiation Processing ›› 2020, Vol. 38 ›› Issue (5): 10-19.doi: 10.11889/j.1000-3436.2020.rrj.38.050201

• RADIATION CHEMISTRY • Previous Articles    

Preparation of polyethylene glycol methyl methacrylate modified polyvinylidene difluoride by homogeneous co-irradiation method

FAN Kai1,2,LIU Enmei1,LIANG Kunkun2,YANG Haijun2,3,HOU Zhengchi2,3()   

  1. 1.Chongqing College of Electronic Engineering, Chongqing 401331, China
    2.Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
    3.Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201204, China
  • Received:2020-04-02 Revised:2020-04-13 Accepted:2020-04-13 Online:2020-10-20 Published:2020-10-19
  • Contact: HOU Zhengchi E-mail:houzhengchi@sinap.ac.cn
  • About author:FAN Kai (male) was born in July 1984, and obtained his doctoral degree from University of Chinese Academy of Sciences in 2018. Now he is focusing on the membrane water treatment research
  • Supported by:
    National Natural Science Foundation of China(11375252);Chongqing College of Electronic Engineering Scientific Research Projects(XJZK201810)

Abstract:

Polyvinylidene difluoride (PVDF) and polyethylene glycol methyl methacrylate (PEGMA) were dissolved in N-methylpyrrolidone to form a homogeneous solution. The grafting reaction was initiated by γ-ray irradiation to prepare a modified polymer, PEGMA-g-PVDF. The analysis of the infrared spectra of PEGMA-g-PVDF before and after irradiation confirmed that the grafting reaction was effectively carried out. The degree of grafting (DG) of the irradiated product was determined by the quantitative analysis of F content before and after irradiation. Moreover, the effects of monomer concentration and absorbed dose on DG of the product were investigated. The results showed that DG increased firstly with the monomer concentration and absorbed dose in a certain range, and then decreased when exceeding the critical point. This paper also studied the thermal stability of the modified polymer through differential scanning calorimetry and thermogravimetric analysis. It was found that the melting point and thermal decomposition temperature of the modified polymer decreased with the increasing DGs. This result indicates that a higher DG reduces material’s thermal stability. Finally, according to the characteristics of homogeneous solution, the mechanism of graft reaction initiated by γ-ray irradiation was explained.

Key words: Polyethylene glycol methyl methacrylate, Polyvinylidene difluoride, Homogeneous solution, Co-irradiation, Mechanism

CLC Number: 

  • TL13