Abstract
Mesoporous diatomite platelets were used for in situ copolymerization of styrene and butyl acrylate by activators generated by electron transfer for atom transfer radical polymerization (AGET ATRP) to synthesize tailor-made poly(styrene-co-butyl acrylate) nanocomposites. FTIR spectroscopy, nitrogen adsorption/desorption isotherm and thermo-gravimetric analysis (TGA) were employed for evaluating some inherent properties of the pristine diatomite platelets. Evaluation of pore size distribution and morphological studies were also performed by SEM and TEM. Conversion and molecular weight determinations were carried out using gas and size exclusion chromatography, respectively. Addition of 3 mass% pristine mesoporous diatomite leads to increase in conversion from 69 to 83%. Molecular weight of poly(styrene-co-butyl acrylate) chains increases from 7920 to 9940 g mol−1 by addition of 3 mass% pristine mesoporous diatomite; however, Đ values increase from 1.17 to 1.45. Appropriate agreement between theoretical and experimental molecular weight in combination with low Đ values can appropriately demonstrate the living nature of copolymerization. Copolymers composition was evaluated using 1H NMR spectroscopy. Increasing thermal stability of the nanocomposites is demonstrated by TGA. Differential scanning calorimetry shows an increase in glass transition temperature from 33 to 36 °C by adding 3 mass% of mesoporous diatomite platelets.
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Davoudizadeh, S., Ghasemi, M., Khezri, K. et al. Poly(styrene-co-butyl acrylate)/mesoporous diatomaceous earth mineral nanocomposites by in situ AGET ATRP. J Therm Anal Calorim 131, 2513–2521 (2018). https://doi.org/10.1007/s10973-017-6771-9
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DOI: https://doi.org/10.1007/s10973-017-6771-9