Synthesis, characterization, and properties of new polystyrene-SiO_2 hybrid sol-gel materials
Synthesis, characterization, and properties of new polystyrene-SiO_2 hybrid sol-gel materials
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DOI：
10.1557/jmr.1993.1143
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发表时间：
1993-05
影响因子：
2.7
通讯作者：
Yen Wei;D. Yang;Liguang Tang;MaryGail K. Hutchins
中科院分区：
文献类型：
--
作者：
Yen Wei;D. Yang;Liguang Tang;MaryGail K. Hutchins
通过溶胶-凝胶法将聚苯乙烯结构单元共价结合到SiO_2玻璃网络中，制备了一类新型的有机-无机杂化材料。通过苯乙烯与甲基丙烯酸3-（三甲氧基硅基）丙酯（MSMA）在不同进料条件下的自由基共聚合，合成了聚合物前体。然后在四氢呋喃中水解，与正硅酸乙酯在室温下共缩聚，得到SiO_2含量为15 ~ 84wt%的聚苯乙烯-SiO_2杂化溶胶-凝胶整体材料。衍生自MSMA含量大于22摩尔%的共聚物的杂化材料具有优异的光学透明性。在这些透明杂化材料中，聚合物链应均匀地分布在无定形SiO_2基体中，并以共价键与基体结合。这些材料的体积性质，包括密度，折射率和硬度被发现是与它们的分子组成，并可以通过改变聚合物含量定制。
A new family of organic-inorganic hybrid materials has been prepared by incorporating polystyrene structure units covalently into the SiO_2 glass network via the sol-gel approach. The polymer precursors were synthesized by free-radical copolymerization of styrene with 3-(trimethoxysilyl)propyl methacrylate (MSMA) at various feeds. These copolymers were then hydrolyzed and co-condensed with tetraethyl orthosilicate in tetrahydrofuran at room temperature to afford monolithic polystyrene-SiO_2 hybrid sol-gel materials having SiO_2 contents of 15 to 84% by weight. The hybrid materials derived from the copolymers with MSMA contents greater than 22 mol% have excellent optical transparency. In these transparent hybrid materials, the polymer chains should be uniformly distributed in and covalently bonded to the amorphous SiO_2 matrices. The bulk properties of these materials including density, refractive index, and hardness were found to be related to their molecular compositions and can be tailored by varying the polymer contents.