可光交联的共聚物肉桂酰化的聚(N-乙烯基吡咯烷酮-丙烯酸-2-羟基乙酯)的合成及其水溶液的温敏性

可光交联的共聚物肉桂酰化的聚(N-乙烯基吡咯烷酮-丙烯酸-2-羟基乙酯)的合成及其水溶液的温敏性

Synthesis of Photocrosslinkable Copolymers of Cinnamoylated Poly(N-vinyl pyrrolidone-2-hydropropyl acrylate) and The Temperature Sensitivity of their Aqueous Solutions

The photocrosslinkable copolymers, poly(N-vinyl pyrrolidone-2-hydropropyl acrylate)(P(NVP-co-HEA)), were synthesized from N-vinyl pyrrolidone and 2-hydropropyl acrylate via radical copolymerization. After cinnamoylation, the copolymers were not only temperature sensitive in aqueous (solution), but also photoactive. The properties of the cinnamoylated P(NVP-co-HEA) were studied. The results show that the low (critical) solution temperature(LCST) of cinnamoylated P(NVP-co-HEA) was 55,50,45,36 at degree of cinnamoylation of 10%, 15%, 20%, 25% in aqueous solution, respectively. At 30% cinnamoylation the (aqueous) (solution) of the copolymer was blue translucent due to micellization, and at 35% cinnamoylation the copolymer became insoluble in water. A film of cinnamoylated P(NVP-co-HEA) crosslinks and becomes (insoluble) under the irradiation of UV light, but it swells in water and becomes a hydrogel.