UV-cured organic-inorganic hybrid nanocomposite initiated by trimethoxysilane-modified fragmental photoinitiator

被引：15
作者：
Hu, Lihua [1 ]
Shi, Wenfang [1 ]
机构：
[1] Univ Sci & Technol China, Dept Polymer Sci & Engn, CAS Key Lab Soft Matter Chem, Hefei 230026, Anhui, Peoples R China
来源：
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING | 2011年 / 42卷 / 06期
基金：
中国国家自然科学基金;
关键词：
Polymer-matrix composites (PMCs); Hybrid; Mechanical properties; UV-curing; SOL-GEL PROCESS; POLYMERIC PHOTOINITIATORS; SILICA NANOPARTICLES; COATINGS; FILMS; PHOTOPOLYMERIZATION; TEMPERATURE; SYSTEMS;
D O I：
10.1016/j.compositesa.2011.02.002
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
An effective approach is proposed to prepare the UV-cured organic inorganic hybrid nanocomposite (Nano-TMS) through the photopolymerization of acrylic resin initiated by trimethoxysilane-modified Irgacure 2959 (TMS-2959). The TMS-2959 as a hybrid photoinitiator was obtained by the esterification of 2-hydroxy-4'-(2-hydroxyethoxy)-2-methylpropiophenone (Irgacure 2959) with thioglycolic acid, following by the addition reaction with 3-(2,3-epoxypropoxy)propyltrimethoxysilane (KH-560). The chemical structure was characterized by FT-IR and (1)H NMR spectroscopy. The oligomeric tetraethylorthosilicate (Oligo-TEOS) was prepared by hydrolysis. The TMS-2959 exhibits the similar UV absorption with Irgacure 2959. The photoinitiating activity of TMS-2959 was investigated through photo-DSC analysis in comparison with Irgacure 2959. From the SEM observation, the SiO(2) nanoparticles dispersed uniformly in the Nano-TMS film, whereas the aggregation of nanoparticles occurred in the UV-cured hybrid nanocomposite (Nano-kg) initiated by Irgacure 2959. Compared with the UV-cured pure polymer and Nano-kg films, the cured Nano-TMS films showed remarkable enhanced thermal stability and mechanical properties. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：631 / 638
页数：8
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