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.
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Abbreviations
- A d :
-
Pre-exponential factor
- E a :
-
Activation energy (kJ mol−1)
- ΔH d :
-
Temperature total decompound enthalpy (J g−1)
- K d :
-
Decomposition constant (s−1)
- R :
-
Universal gas constant (8.314 J mol−1 K−1)
- T :
-
Kelvin temperature (K)
- T 0 :
-
Initial decomposition temperature (°C)
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Acknowledgements
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).
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Wang, Y., Li, R., Jia, H. et al. A novel silane coupling agent with peroxy groups used as an initiator in the graft polymerization of AN or MMA on nano-TiO2. Chem. Pap. 72, 2871–2877 (2018). https://doi.org/10.1007/s11696-018-0524-5
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DOI: https://doi.org/10.1007/s11696-018-0524-5