【作者】 徐斌；

【导师】 钟明强；

【作者基本信息】 浙江工业大学 ， 材料学， 2006， 硕士

【摘要】 论文介绍了苯丙／纳米粒子(纳米二氧化钛和纳米二氧化硅)乳液原位聚合技术，重点考察纳米粒子及协同效应对乳液的耐紫外光老化性能的影响。主要研究内容如下：总结了乳液配方和原位聚合工艺；用偶联剂改性纳米粒子，合成性能稳定的纳米粒子／苯丙原位复合乳液，研究纳米粒子的加入对复合乳液性能(外观、力学性能、流变性能、热性能等)的影响；重点研究比较了两种纳米粒子(纳米二氧化钛和纳米二氧化硅)协同效应对乳液抗紫外光老化性能的影响。 改性前后的纳米粒子的红外谱图表明，纳米粒子表面的羟基与偶联剂发生反应，偶联剂已通过化学键偶联到纳米粒子的表面；纳米粒子用量增大，发生团聚，纳米效应降低，乳液性能下降；通过TEM，DSC等分析测试技术研究苯丙／纳米粒子共聚物的结构和性能，发现共聚物中无双键存在，聚合反应进行彻底；添加纳米粒子后，共聚物Tg显著提高，并且纳米粒子以纳米级分散在苯丙乳液中；静态流变性能研究表明，乳液的粘度随纳米粒子含量先增后减；动态流变性能研究表明，乳液具有假塑性流体特性；纳米粒子的协同效应能够一定程度上克服纳米粒子团聚给乳液体系带来的性能下降，使乳液紫外光透过率降低幅度增大，性能较之加入单种纳米粒子的复合乳液胶膜有明显提高。纳米粒子含量太高后，胶膜粉化等级和色差等级反而下降。更多还原

【Abstract】 This paper introduce the preparation of St-BA / Nano particles compound emulsion by in-situ emulsion polymerization, especially research the syngestic effect of the Nano particles on emulsion anti-ultraviolt aging propertity. The research contents include: choosing and comparising the influencing factors, systematic summarizing the emulsion recipe and seed polymerization method; Surface treating the Nano-particles, synthesizing stable emulsion, and testing the materials properties（outlook、 machenical property、 rheological property、 themo-property etc）; Specially investigating the influencement on the anti-aging property of specimen with nano-particles under UV treatment.IR of Nano-particles shows that coupling agent conject the surface of nano-particles by chemical bond; Adding nano-particles improves material’s properties, when dosage increase, the agglomeration of particles makes the material properties decrease; From the TEM、 DSC,we found that there is no monomer in product, the specimen’s Tg increased evidently as the nano-particles added, Nano-particles scatter less than 100nm in copolymer after the surface treatment; The static rheological test found the emulsion viscosity increased first, then reduced as the content of nano-particles enhancing, the dynamic rheological test indicated that the emulsion was pseudoplastic fluid; The Synergetic effect of TiO₂& SiO₂更多还原