A novel silane coupling agent with peroxy groups used as an initiator in the graft polymerization of AN or MMA on nano-TiO2
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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.
KeywordsSilane coupling agent Peroxy groups Nanocomposites Surface modification
List of symbols
Activation energy (kJ mol−1)
Temperature total decompound enthalpy (J g−1)
Decomposition constant (s−1)
Universal gas constant (8.314 J mol−1 K−1)
Kelvin temperature (K)
Initial decomposition temperature (°C)
Financial and facility support for this research came from the National Natural Science Foundation of China (21376127), (U1162123) and (51103076), the Overseas Scholars Foundation of the Education Department of Heilongjiang Province of China (1251H012) and the Science and Technology Plan of Qiqihar City (GYGG-20602).
- Arun M, Kantheti S, Gaddam R, Narayan R, Raju K (2014) Surface modification of TiO2 nanoparticles with 1,3,5-triazine based silane coupling agent and its cumulative effect on the properties of polyurethane composite coating. J Polym Res 21:600. https://doi.org/10.1007/s10965-014-0600-7 CrossRefGoogle Scholar
- Auffan M, Pedeutour M, Rose J, Masion A, Ziarelli F, Borschneck D, Chaneac C, Botta C, Chaurand P, Labile J, Bottero J (2010) Structural degradation at the surface of a TiO2-based nanomaterial used in cosmetics. Environ Sci Technol 44:2689–2694. https://doi.org/10.1021/es903757q CrossRefPubMedGoogle Scholar
- Sabzi M, Mirabedini S, Zohuriaan-Meh J (2009) Surface modification of TiO2 nano-particles with silane coupling agent and investigation of its effect on the properties of polyurethane composite coating. Prog Org Coat 65(2):222–228. https://doi.org/10.1016/j.porgcoat.2008.11.006 CrossRefGoogle Scholar