A novel silane coupling agent with peroxy groups used as an initiator in the graft polymerization of AN or MMA on nano-TiO2

作者：Wang, Yazhen^*; Li, Rifang; Jia, Hongge^*; Yang, Guoxing; Di, Yutao; Xu, Chenxi; Ma, Liqun; Zhang, Hui; Zhou, Yongli; Zang, Yu; Xu, Shuangping; Sun, Zhaoyang; Zu, Liwu; Yue, Chenge; Lan, Tianyu

来源：CHEMICAL PAPERS, 2018, 72(11): 2871-2877.

DOI：10.1007/s11696-018-0524-5

• Silane coupling agent
• Peroxy groups
• Nanocomposites
• Surface modification

A novel peroxy group-containing silane coupling agent was synthesized and anchored on the surface of titanium dioxide nanoparticles (nano-TiO2) to form an immobilized-initiator-modified nano-TiO2 species. In this study, the kinetic parameters of the peroxy group-containing silane were tested and assessed using DSC. The pre-exponential factor (A (d)) was 8.973 x 10(8) and the activation energy (E (a)) was 80.736 kJ mol(-1). Moreover, the empirical Arrhenius equation was determined to be ln K (d) = - 80.736/RT + ln(8.973 x 10(8)). To obtain continuous polymers, acrylonitrile (AN) and methyl methacrylate (MMA) were polymerized using the novel peroxy group-containing silane and FeSO4 as an initiator system. The number average molecular weights (M (n) of PAN = 3x10(4) and M (n) of PMMA = 1.4 x 10(5)) and polydispersity indexes (PDI of PAN = 2.76 and PDI of PMMA = 1.65) were determined by GPC. It was suggested that the redox initiation system can generate highly reactive species on the surfaces of inorganic nanoparticles. The nano-TiO2-grafted polymers were successfully obtained.

• 出版日期2018-11
• 单位齐齐哈尔大学