【作者】 廖海军；

【导师】 张超灿；

【作者基本信息】 武汉理工大学 ， 材料学， 2004， 硕士

【摘要】 本论文研究了以硅烷偶联剂KH570，三甲基氯硅烷(TMCS)为原料制备有机硅单体γ-甲基丙烯酰氧丙基三(三甲硅氧基)硅烷(TRIS)的合成方法，讨论了反应温度、加料方式、原料配比等条件对产率的影响，用红外光谱、核磁共振、元素分析等分析测试手段对产物结构进行了表征。然后，以此单体为原料用乳液聚合法制备了有机硅均聚物(PTRIS)乳液、有机硅．丙烯酸酯共聚(P(MMA-co-TRIS))乳液和聚甲基丙烯酸甲酯(PMMA)乳液。用IR，TEM，DMA，水滴接触角测试等方法表征所制备的均聚物和共聚物膜发现：采用有机硅表面活性剂与十二烷基硫酸钠复配使用，用量在6％～8％(相对单体量)可得到粒径分布均匀且稳定的均聚和共聚乳液。各种均聚物、共聚物膜的水滴接触角显示，单体TRIS的含量越高，膜的水滴接触角越大，这也表明共聚物的表面能随TRIS的含量呈梯度变化。共聚物的玻璃化转变温度随TRIS的含量增加由PMMA的Tg的高温区向PTR／S的Tg的低温区移动。 通过乳液共混时发生自结构，本文以乳液共混法制备了有机硅聚合物-聚丙烯酸酯梯度复合材料。通过测试有机硅聚合物-聚丙烯酸酯共混梯度膜的结构，发现PTRIS和PMMA的相容性较差，加入不同聚合比例的共聚物P(MMA-co-TRIS)后相容性得到改善，并可以得到一面是丙烯酸酯端；然后结构渐变成有机硅聚合物端的梯度膜。应用DMA，DSC，UV等测试手段表征了有机硅聚合物-聚丙烯酸酯梯度膜的性能。结果表明：有机硅聚合物-聚丙烯酸酯梯度膜有一个较宽的玻璃化转变温区，玻璃化转变范围相对组分材料的玻璃化转变范围发生了扩展：有机硅聚合物-聚甲基丙烯酸酯梯度膜具有较好的热学性能；硅含量的提高有利于改善膜层的憎水性能和紫外吸收性能。更多还原

【Abstract】 The organosilicone monomer -[tris(trimethylsiloxy)silyl]propyl methacrylate was synthesized by trimethylchlorosilane(TMCS) and -(trimethyloxysilyl)propyl methacrylate(KH-570), A improved synthetical method of organosilicone monomer TRIS with higher silicone content than raw monomer -(trimethyloxysilyl)propyl methacrylate (KH-570) was raised, and poly- -[tris(trimethylsiloxy)silyl]propyl methacrylate latex was prepared by emulsion polymerization, IR was used to study the polymer structure. The different ratio and dosage of composite surfactants were researched about the polymer latex’s stabilization and structure.Afterwards, the emulsion polymerization of TRIS, MMA, and P(MMA-co-PTRIS) were carried out. Some different monomer ratio copolymer latex and homopolymer latex are prepared by emulsion polymerization used self-made organosilicone monomer -[tris(trimethylsiloxy)silyl]propylmethacrylate and MMA. The different ratio and dosage of composite surfactants were researched about the polymer latex’s stabilization and structure. These copolymers and homo-polymer blend to prepare self-structure gradient film.To prepare the functionally gradient materials (FGM) of polysilane-polyacrylate, the method of emulsion mixture was performed. The obtained polysilane-polyacrylate gradient films showed no macro-interface with the silicone content reducing gradually from the top surface to the bottom one. And has a long Tg transform term. Based on the results of the back-scattered electron images and linear scanning of the polysilane -polyacrylate film’s cross section, the dependence of polysilane-polyacrylate film’s structure on molecules of poly[ -[tris(trirnethylsiloxysilyl)]propyknethacrylate] (PTRIS) and polyacrylate (PMMA), P(MMA-co-PTRIS) feed ratio were investigated. Then properties of the polysilane-polyacrylate gradient film were characterized. The mechanism of film forming process of polysilane-polyacrylate FGM was probed into as well.The testing results indicated that adding P(MMA-co-PTRIS) of different can improve the poor miscibility of PMMA and PTRIS because P(MMA-co-PTRIS) contained both PMMA chains and organosilicone chains which joint PMMA and PTRIS as a bridge. The obtained polysilane-polyacrylate gradient films showed no macro-interface with the silicone content reducing gradually from the top surface to the bottom one. DMA thermograms indicated that polysilane-polyacrylate gradient films contained two glass temperatures with their bands drifting from and their range extending much from each component. The good properties of waterproof, calorifics, and ultraviolet-absorption were also determined by DSC, UV and water contact angle measurements.更多还原