Preparation and characterization of polystyrene/titanium dioxide composite particles containing organic ultraviolet‐stabilizer groups

Abstract

Polystyrene/titanium dioxide (TiO 2 ) composite particles containing organic ultraviolet (UV)-stabilizer groups were prepared by the emulsion copolymerization of styrene and 2-hydroxy-4-(3-methacryloxy-2-hydroxylpropoxy)benzophenone with sodium sulfopropyl lauryl maleate as a surfactant in the presence of rutile TiO 2 modified with 3-(trimethoxysilyl) propyl methacrylate, and the product was poly[styrene-co-sodium sulfopropyl lauryl maleate-co-2-hydroxy-4-(3-methacryloxy-2-hydroxylpropoxy) benzophenone] [poly(St-co-M12-co-BPMA)]/TiO 2 composite particles. The structures of the composite particles were characterized with Fourier transform infrared spectroscopy, ultraviolet-visible (UV-vis) absorption spectroscopy, thermogravimetric analysis, and differential scanning calorimetry. The Fourier transform infrared and UV-vis measurements showed that poly(St-co-M12-co-BPMA) was grafted from the surface of TiO 2 , and this copolymer possessed a high absorbance capacity for UV light, which is very important for improving the UV resistance of polystyrene. The thermogravimetric analysis measurements indicated that the percentage of grafting and the grafting efficiency could reach 513.9 and 59.9%, respectively. The differential scanning calorimetry measurement indicated that the glass-transition temperature of the poly(St-co-M12-co-BPMA)/TiO 2 composite particles was higher than that of poly (St-co-M12-co-BPMA).These research results are very important for preparing polystyrene with high UV resistance.

Preparation and Characterization of Organic Nano-Titanium Dioxide/Acrylate Composite Emulsions byin-situEmulsion Polymerization

“…E-mail: hqli1979@gmail.com; psxrzeng@gmail.com commonly used to modify the nano-TiO 2 surfaces (7). For example, Zou et al first prepared modified TiO 2 with 3-(trimethoxysilyl) propyl methacrylate as modifier, and subsequently synthesized polystyrene/TiO 2 composite particles by emulsion copolymerization (8). Yamada et al reported a novel strategy for incorporation of nano-TiO 2 particles, which were crystallized from peroxotitanic in the presence of hydrophilic polymer by hydrothermal treatment in aqueous solution, into poly(methyl methacrylate) via dispersion into chloroform (9).…”

Studies on thermal stability and UV-resistant performance of poly(MMA-co-M12-co-BPMA)/TiO2 composite particles

“…According to the previous elementarily study results [7], by introducing both of the inorganic UV-stabilizer TiO 2 and the reactive organic UV-stabilizers into the polymer chains by covalent bonding, the UV-resistant performance of PMMA can be enhanced due to the effects of organic UV-stabilizers and inorganic UV-stabilizer TiO 2 together. In order to further study the corporative effect of organic UV-stabilizers and inorganic UV-stabilizer in protecting PMMA from UV degradation, the UVresistant performance of poly(methyl methacrylate-co-sodium sulfopropyl lauryl maleate-co-2-hydroxy-4-(3-methacryloxy-2-hydroxylpropoxy) benzophenone) /TiO 2 (i.e.…”

“…Firstly, 0.5 g modified TiO 2 [7] was dispersed in 45 ml of M12 (1.5 mmol) aqueous solution via ultrasonic vibrations under 150~200W (SC-⎯ultrasonic apparatus manufactured by Chengdu Jiuzhou Ultrasonic Technology Co. Ltd) for 10 minutes. Then the TiO 2 slurry was diverted into 150 ml three-neck flask equipped with N 2 flows, mechanical stirrer and drop funnel.…”

“…Polymer/inorganic composite particles usually degrade at higher temperatures, and demonstrate a substantial decrease in the degradation rate. In the past decades, many groups have carried out considerable work on the elaboration of polymer/inorganic composite systems by the embedding of inorganic particles into organic polymers [3][4][5][6][7][8].…”

Stability of Uv Stabilizers

“…60 2-hydroxy-4-(3-methacryloxy-2-hydroxylpropoxy) benzophenone has been grafted on polystyrene and used to prepare composite with titanium dioxide. 61,62 Improved UV resistance and durability of treatment were obtained. Benzophenone-type UV absorber was grafted on LPDE by γ-irradiation, which resulted in increased stability of the composition.…”