PDMS－PA多嵌段共聚物的超临界流体辅助熔融反应制备新技术研究

项目名称： PDMS－PA多嵌段共聚物的超临界流体辅助熔融反应制备新技术研究

项目编号： No.21306177

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 化学工业

项目作者： 刘赫扬

作者单位： 浙江科技学院

项目金额： 25万元

中文摘要： 高性能多嵌段共聚物制备及结构调控是高分子科学领域的重要研究内容。本项目拟借助超临界流体技术，采用聚合物－单体缩合及聚合物－聚合物缩合两条路线，实现具有热塑性弹性体特征的聚二甲基硅氧烷（PDMS）－聚酰胺（PA）多嵌段共聚物的熔融缩聚制备。与传统溶液过程相比，熔融缩聚由于不使用溶剂而更加绿色环保。超临界流体的引入，可抑制反应过程中的相分离行为，降低该反应过程的温度，强化高粘条件下的传质，促进反应进行。两条制备路线的采用，则进一步丰富了产物结构的调控手段。利用上述技术，可控地制备出一系列不同微观链结构的PDMS－PA多嵌段共聚物，可望深入研究其"过程－结构－性能"关系，为PDMS/PA热塑性弹性体自主开发建立基础，也为其它非全碳主链多嵌段共聚物制备提供借鉴。拟解决的问题主要有：超临界流体对反应体系的溶解、溶胀及流变行为与其对反应过程中相分离抑制与传质强化效果的耦合作用；以及产物微观结构的调控。

中文关键词： PDMS－PA多嵌段共聚物；熔融缩聚；溶液缩聚；超临界二氧化碳；相容剂

英文摘要： The synthesis and structure control of high-performance multi-block copolymers is one of the most important and intensively investigated areas of polymer science. In this project, the polydimethylsiloxane(PDMS) - polyamide(PA) multi-block copolymer, with a characteristic of thermoplastic elastomer, will be prepared in melt in two routes, the polymer-monomer condensation and the polymer-polymer condensation, based on a supercritical fluid aided polycondensation process. In comparison with the conventional solution process, the process adopted in this project is more environmentally benign since it is free of solvents. In addition, the application of the supercritical fluid will inhibit the phase separation behavior during the reaction process, enhance the mass transport in a highly viscous fluid without the need to increase the reaction temperature, and finally promotes the reaction as a result. Meanwhile, the use of the above two routes will enrich the means of the structure control of the products. Based on these technologies, it is feasible to controllably prepare PDMS-PA multi-block copolymers with different micro-chain structure, and demonstrate the internal relationship related to the preparation, the structure and the performance of those copolymers. All these issues are significant for the independent dev

英文关键词： PDMS-PA Multi-Block Copolymer；Melt Polycondensation；Solution Polycondensation；Supercritical Carbon Dioxide；Compatibilizer