| PMMA/SiO_2透明块体材料的制备及其热性能 |
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| 引用本文： | 毕于铁,任洪波,张林,王鲜,尚承伟.PMMA/SiO_2透明块体材料的制备及其热性能[J].应用化学,2009,26(10). |
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| 作者姓名： | 毕于铁 任洪波 张林 王鲜 尚承伟 |
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| 作者单位： | 1. 西南科技大学,材料科学与工程学院,绵阳;中国工程物理研究院,激光聚变研究中心,绵阳,621900
2. 中国工程物理研究院,激光聚变研究中心,绵阳,621900 |
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| 摘 要： | 以正硅酸乙酯为前驱体,采用无溶剂水解技术,制备出了均一、稳定、透明的SiO_2溶胶,通过透射电子显微镜分析,粒径在100 nm左右;在溶胶中加入甲基丙烯酸甲酯(MMA)和偶氮二异丁腈(AIBN),采用热固化制备了透明的块体PMMA/SiO_2杂化材料,通过差热(DSC)和热重分析(TGA)研究了杂化材料的热性能. DSC结果表明,当体系中的SiO_2质量分数超过20%时,杂化材料无明显的玻璃化转变现象. TGA结果表明,杂化材料的分解温度提高约110 ℃. 透射电子显微镜观察结果表明,无机相均匀分散在有机相中,两相之间没有明显的相分离现象.
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| 关 键 词： | 有机-无机杂化材料 SiO_2溶胶 甲基丙烯酸甲酯 正硅酸乙酯 |
Preparation and Thermal Properties of Transparent PMMA/SiO_2 Hybrid Bulk Materials |
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| BI Yu-Tie,REN Hong-Bo,ZHANG Lin,WANG Xian,SHANG Cheng-Wei.Preparation and Thermal Properties of Transparent PMMA/SiO_2 Hybrid Bulk Materials[J].Chinese Journal of Applied Chemistry,2009,26(10). |
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| Authors: | BI Yu-Tie REN Hong-Bo ZHANG Lin WANG Xian SHANG Cheng-Wei |
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| Abstract: | Silicon dioxide sol was synthesized from inorganic salt precursor, tetraethylorthosilioate by hydro-lysis and condensation in water. The thermal stabilities and micro-structure of PMMA/SiO_2 hybrid materials were characterized with TEM, DSC and TG. The studies reveal that the diameter of the particles was about 100 nm. The glass transition temperature of the PMMA/SiO_2 hybrid materials disappeared when ω(SiO_2) was more than 20%, and the thermal decomposition temperature increased by 110 ℃. The forming of homogeneous inter-penetrated network between the organic phase and the inorganic phase demonstrated the miscibility of the two species had been improved. |
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| Keywords: | organic-inorganic hybrid material silicon dioxide sol methylmethacrylate tetraethyl orthosilioate |
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