Synthesis of readily degradable block copolymers and fabrication of polymer films with controlled nano-pore structure

研究了由易降解的聚过氧化物和乙烯基聚合物组成的嵌段共聚物的合成，以制备纳米多孔薄膜，并利用聚过氧化物的易降解特性来控制表面润湿性。研究了嵌段共聚物的降解行为。首先，采用可逆链转移催化聚合建立了可降解嵌段共聚物的合成路线。作为一种不可降解的乙烯基聚合物块，有聚甲基丙烯酸酯、聚丙烯酸酯和聚苯乙烯。结果表明，在110 ~ 150℃加热时，可降解嵌段共聚物中只有一个聚过氧化物嵌段被降解，而乙烯基聚合物嵌段没有被降解。研究了可降解嵌段共聚物薄膜的形貌。研究了聚过氧化物块体降解对纳米多孔薄膜的形成、表面润湿性和粘附性能的影响。

The synthesis of block copolymers consist of readily degradable polyperoxide and vinyl polymer as a non-degradable polymer was investigated in order to prepare nano-porous thin films and to control surface wettability using the readily degradable nature of polyperoxides. The degradation behavior of the block copolymers was also investigated. First of all, the synthetic route to the degradable block copolymers was established using reversible chain-transfer catalyzed polymerization. As a non-degradable vinyl polymer block, polymethacrylates, polyacrylates, and polystyrene were available. It was revealed that only a polyperoxide block in the degradable block copolymer was degraded upon heating at 110 to 150℃ without any degradation of the vinyl polymer block. The morphology of the degradable block copolymer thin films was investigated. The formation of nano-porous thin films and the changes of the surface wettability and adhesion properties induced by the degradation of polyperoxide block in were also investigated.