基底表面无规聚甲基丙烯酸甲酯立构复合结构的研究  

Studies on Atactic Poly (methyl-methacrylate) Stereocomplex at Substrate

作　　者：王继君[1] 卢咏来[1] 沈德言[1] 

机构地区：[1]中国科学院化学研究所,北京100080

出　　处：《高等学校化学学报》2003年第5期932-934,共3页Chemical Journal of Chinese Universities

基　　金：国家自然科学重点基金(批准号:20023003)

摘　　要：采用原子力显微镜和反射吸收红外光谱研究了在基底上无规聚甲基丙烯酸甲酯立构复合结构的形成和结构特征,纯等规和间规聚甲基丙烯酸甲酯与等规/间规混合物(有立构复合结构生成)表面聚集形貌比较的结果表明,立构复合结构的生成使聚甲基丙烯酸甲酯在基底上形成树枝状的聚集形貌,因此无规聚甲基丙烯酸甲酯在基底上的树枝状聚集形貌表明了其内部生成了立构复合结构,而且这种结构对聚集形貌产生了重大影响,反射吸收红外光谱的研究表明,在基底表面薄膜中无规聚甲基丙烯酸甲酯主链结构比在本体厚膜中的更加伸展,更有利于立构复合结构的生成。The formation of stereocomplex and aggregates structure of atactic poly(methyl-methacrylate) (a-PMMA) stereocomplex at substrate was studied by using Atomic Force Microscopy and Reflection Absorption Infrared Spectroscopy(AFM and RAS). Comparing AFM images of pure isotactic and syndiotactic PMMA with that of the mixture of isotactic and syndiotactic PMMA in which stereocomplex formed, it is shown that stereocomplex lead to the dendritic aggregates of PMMA on silicon wafer. The dendritic aggregates of a-PMMA indicated that the stereocomplex formed in a-PMMA, which played an important role in the patterning of a-PMMA at substrate. Reflection Absorption Spectroscopy data show that a-PMMA backbone chain preferred to extend at a substrate than in bulk, it favors to form more stereocomplex.

关 键 词：无规聚甲基丙烯酸甲酯 立构复合结构 原子力显微镜 反射吸收红外光谱 

分 类 号：O632.52[理学—高分子化学] O631.1[理学—化学]