OALib Journal期刊
ISSN: 2333-9721
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紫杉醇在聚甲基丙烯酸树脂中的物化状态
Keywords: 有机高分子材料,紫杉醇,聚甲基丙烯酸树脂
Abstract:
?研究了紫杉醇在聚甲基丙烯酸树脂中的化学稳定性、物理分布和物理状态,并分析了其影响因素.结果表明,紫杉醇在复合膜中没有与聚甲基丙烯酸树脂发生化学反应,释放后不改变化学结构;紫杉醇在复合膜中的物理分布受溶剂性质的影响,以四氢呋喃为溶剂,紫杉醇可均匀分布于复合膜中.紫杉醇在复合膜中的存在状态与紫杉醇含量及热处理制度有关.当紫杉醇的含量(质量分数)为10%时,在薄膜中不存在结晶态紫杉醇,当含量大于20%时,出现结晶态紫杉醇.在tg点附近退火可使薄膜中结晶态紫杉醇的含量增加,从而提高紫杉醇的时效稳定性及其在复合膜中的扩散速度.
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