ISSN print edition: 0366-6352
ISSN electronic edition: 1336-9075
Registr. No.: MK SR 9/7
A novel silane coupling agent with peroxy groups used as an initiator in the graft polymerization of AN or MMA on nano-TiO2
Yazhen Wang, Rifang Li, Hongge Jia, Guoxing Yang, Yutao Di, Chenxi Xu, Liqun Ma, Hui Zhang, Yongli Zhou, Yu Zang, Shuangping Xu, Zhaoyang Sun, Liwu Zu, Chenge Yue, and Tianyu Lan
Qiqihar University, Qiqihar, People’s Republic of China
Abstract: 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 (Ad) was 8.973 × 108 and the activation energy (Ea) was 80.736 kJ mol−1. Moreover, the empirical Arrhenius equation was determined to be ln Kd = − 80.736/RT + ln(8.973 × 108). 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 (Mn of PAN = 3×104 and Mn of PMMA = 1.4 × 105) 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.
Keywords: Silane coupling agent ; Peroxy groups ; Nanocomposites ; Surface modification
Full paper is available at www.springerlink.com.
Chemical Papers 72 (11) 2871–2877 (2018)
Thursday, November 21, 2019