论文部分内容阅读
甲基丙烯酸3-三甲氧基硅丙酯(MPS)和苯乙烯的种子乳液聚合反应过程中同时发生自由基共聚合反应和硅氧烷基的水解缩合反应.通过对MPS在不同条件下乳液聚合过程中粒径及其分布的表征、对反应过程中MPS水解产物的跟踪2、9Si固态核磁共振谱(NMR)和红外光谱(FTIR)对反应得到的聚合产物结构的表征对反应过程和机理进行了研究.阐明了不同的反应条件(如水介质的pH值、MPS的加入量和加入方式)下,此种子乳液聚合体系中各类反应的发生场所、各场所下的反应特点、反应中间产物以及由其导致的不同的成核和聚并机理和最终聚合物的微结构.发现根据不同反应条件下的自由基共聚合速率、水解缩合速率以及MPS在粒子相和水相中分配的不同,反应过程呈现差异很大的机理,且得到的乳胶粒形态、微结构也有很大不同.
During the seed emulsion polymerization of 3-trimethoxysilylpropyl methacrylate (MPS) and styrene, the radical copolymerization reaction and the hydrolysis condensation reaction of siloxane groups occur simultaneously. Through the emulsion polymerization of MPS under different conditions Characterization of particle size and distribution during the reaction, tracking of MPS hydrolysates during the reaction.2,9Si NMR and FTIR characterization of the structure of the polymerized product The reaction process and mechanism were carried out The study clarified the different reaction conditions (such as the pH value of aqueous medium, the amount of MPS added and added), the various sub-emulsion polymerization system where the reaction occurred, the reaction characteristics of the various places, the reaction intermediates and The different nucleation and aggregation mechanisms and the microstructure of the final polymer resulting from it.It was found that depending on the radical copolymerization rate, the hydrolysis condensation rate and the distribution of MPS in the particle and aqueous phases under different reaction conditions, the reaction Process presents a very different mechanism, and the resulting latex particle morphology, microstructure is also very different.