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Citation: ZHANG Xi-Lan, YUAN Jin-Fang, GAO Qing-Yu. Synthesis of Photocrosslinkable Copolymers of Cinnamoylated Poly (N-vinyl pyrrolidone-2-hydropropyl acrylate) and The Temperature Sensitivity of their Aqueous Solutions[J]. Chinese Journal of Applied Chemistry, ;2005, 22(8): 844-847. shu

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

1.
College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475001

Corresponding author: GAO Qing-Yu,
Received Date: 29 October 2004
Available Online: 13 March 2005
Fund Project: 国家自然科学基金(50273010) (50273010)河南省高校杰出青年创新基金(2000KYCX002)资助项目 (2000KYCX002)

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.
- cinnamoylated poly (N-vinyl pyrrolidone-hydropropyl acrylate),
- synthesis,
- photocrosslinking,
- temperature sensitivity
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