摘要
采用紫外光引发聚合将聚N-异丙基丙烯酰胺(PNIPAAm)接枝在聚苯乙烯(PS)表面或在PS表面形成与之相容性较好的NIPAAm与苯乙烯(St)共聚物即P(NIPAAm/St)共聚物层,以改性PS的表面性质。红外光谱分析(FTIR)和表面接触角测试结果表明,PNIPAAm或P(NIPAAm/St)共聚物可以在PS表面稳定存在,使PS表面由疏水性变为亲水性,且具有一定的温敏性。单纯PNIPAAm接枝PS改性层的温敏性更为明显,当温度由23℃增加到40℃时,PNIPAAm改性PS表面与水的接触角由44°左右增加到68°左右。P(NIPAAm/St)共聚物中的St有利于提高改性层与PS的相容性、透明性及稳定性,但其温敏性下降。
Polystyrene （PS） surface was modified by UV-grafting of PNIPAAm or copolymer of NIPAAm and St with better compatibility to PS. The results of FTIR and contact angle to water droplet show that PNIPAAm or P（NIPAAm/St） copolymer can exist tightly on the surface of PS and turn the PS surface from hydrophobic to hydrophilic along with thermosensitivity. PNIPAAm grafted PS exhibites obvious thermosensitive characteristic meanwhile its the contact angle to water droplet changes from 44° at 23 ℃ to 68° at 40 ℃. St in P（NIPAAm/St） copolymer helps improving the PS compatibility, transparence and stability of the grafted polymer but leads to the depress of thermosensitivity.
出处
《现代塑料加工应用》
CAS
北大核心
2012年第1期20-22,共3页
Modern Plastics Processing and Applications
