超临界CO_2中CTFE和BVE的共聚合研究

Copolymerization of Chlorotrifluoroethylene and n-Butyl Vinyl Ether in Supercritical Carbon Dioxide

以超临界CO2为反应介质,制备得到三氟氯乙烯(CTFE)和乙烯基正丁基醚(BVE)共聚物,研究了单体配比、反应温度、引发剂用量、单体浓度对聚合反应及聚合物的结构与性能的影响情况。结果表明:通过控制单体配比及其他实验条件,可以得到不同结构、不同氟含量的含氟聚合物;当单体配比中CTFE的比例增大到一定程度(BVE/CTFE质量比<6/10),实验得到的聚合物是交替共聚物。同时实验发现,聚合反应过程中压力的变化与反应的进程是同步的。

As an excellent fluorine-containing material, chlorotntlurooetnylene ana n-vutyl vmyl emer copolymer was widely used to coating and adhesive. Many short-comings existed in the traditional production ofP（CTFE-co-BVE） copolymer, so a new synthesis ofP（CTFE-co-BVE） copolymer was produced in the work. That is to say, supercritical carbon dioxide was used as reaction medium to produce P （CTFE- co-BVE） copolymer. The effect of monomer ratio, temperature and initiator on polymerization and the structure and perfoumance of the polymer was tested. The expermental date indicated that different structure and fluorine proportion polymer can be obtained by controlling monomer ratio. When the mass ratio of CTFE in feed is less than 6/10, alternating copolymer can be obtained. In addition, the expermental date indicated also that pressure and reacton progress in the polymerization was simultaneous.