OALib Journal期刊
基于单独MBA凝胶纤维的RAFT聚合制备聚合物微米管
DOI: 10.6023/A14120836
Keywords: RAFT聚合 ,MBA凝胶纤维 ,聚合物微米管 ,微观形貌
Abstract:
研究凝胶形成温度对N,N'-亚甲基双丙烯酰胺(MBA)凝胶纤维尺寸的影响,发现凝胶纤维平均直径随着凝胶形成温度的降低而降低,在-25℃下可得到平均直径为1.1μm的小尺寸凝胶纤维.在不加共聚单体条件下,以1.1μm小尺寸MBA纤维为模板和反应单体,通过可逆加成断裂链转移(RAFT)自由基聚合,以较高收率得到形貌规整并有一定自支撑能力的聚合物微米管.研究各种反应条件对聚合反应的影响,结果表明RAFT试剂用量、引发剂用量及反应温度都会影响产物形貌及收率.采用扫描电子显微镜(SEM)、透射电子显微镜(TEM)和红外光谱仪表征了聚合物微米管的微观形貌和组成,热失重分析表明产物具有很高的耐热性能.
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