PB-g-NIPAM温敏性核壳结构微球的制备与表征

摘要

N-isopropylacrylamide(NIPAM) was grafted onto polybutadiene latex via emulsion polymerization. Graft degree, particle size and morphology of PBL-g-NIPAM were analyzed. The best reaction conditions were 30%concentration of NIPAM, 60℃of reaction temperature and 4 hour of reaction. FT-IR analysis shows that there are characteristic absorption peaks of NIPAM, LPS indicates that both the average particle size increased. TEM observations reveal that PBL-g-PVA particles are core-shell structure.%将N-异丙基丙烯酰胺（NIPAM）接枝到聚丁二烯胶乳（PBL）粒子上，制备N-异丙基丙烯酰胺接枝聚丁二烯（PB-g-NIPAM）共聚物，并对PB-g-NIPAM的接枝率、结构、粒子粒径和形貌进行分析。结果表明，最佳反应条件是 NIPAM 浓度为30%，温度为60℃，时间为4h；FT-IR 图谱显示出PB-g-NIPAM有NIPAM特征吸收峰；LPS显示平均粒径增加；TEM观测到PB-g-NIPAM粒子呈核壳结构。