八甲基环四硅氧烷/氨基取代有机硅单体的本体阴离子共聚动力学

Bulk Anion-copolymerization Kinetics of Octamethylcyclotetrasiloxane and Amino-silicone Monomer

通过实验分析了八甲基环四硅氧烷(D4)/N-b -氨乙基-g -氨丙基甲基二甲氧基硅烷(APAEDMS)的本体共聚机理, 并结合普适的阴离子聚合机制建立了D4/APAEDMS本体共聚速率模型。通过因素(温度、催化剂浓度及原料单体配比)实验考核并完善了所建立的速率模型。研究表明,D4/APAEDMS的本体共聚具有阴离子聚合特点,也含有部分逐步聚合行为,在APAEDMS / D4 质量比小的情况下,可以用普适的阴离子聚合方程进行模型化。

The bulk anion-copolymerization mechanism of Octamethylcyclotetrasiloxane and amino-silicone monomer was analyzed via the typical experiment results and the copolymerization mechanism which was suggested that the reaction is intervenient between chain and step reaction. According to the reaction mechanism suggested above and the general anion-polymerization rate equation, the rate model of bulk anion-copolymerization of Octamethylcyclotetrasiloxane and amino-silicone monomer was proposed. The effects of copolymerization temperature, catalyst concentration and monomer ratio on copolymerization were investigated and the copolymerization rate model of Octamethylcyclotetrasiloxane and amino-silicone monomer was confirmed and perfected basically in this study. The results show that there exist anion polymerization characters and parts of step polymerization behaviors in the process of copolymerization of Octamethylcyclotetrasiloxane and amino-silicone monomer. Simultaneously, it was found with increase of the mass ratio of Octamethylcyclotetrasiloxane, the polymerization behaviors can be more approximately modeled by the general anion-polymerization rate equation.