论文部分内容阅读
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.
The effect of gel formation temperature on the size of N, N’-methylenebisacrylamide (MBA) gel fibers was investigated. The average diameter of the gel fibers was found to decrease as the gel formation temperature decreased, and at -25 ° C To obtain the small size gel fibers with the average diameter of 1.1μm.Using reversible addition fragmentation chain transfer (RAFT) radical polymerization with 1.1μm small size MBA fibers as template and reaction monomer without comonomer, The results showed that the amount of RAFT reagent, the amount of initiator and the reaction temperature all affect the morphology of the product and the influence of reaction temperature on the polymerization reaction. The morphology, morphology and composition of the polymeric microtubes were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and infrared spectroscopy (FT-IR). The thermogravimetric analysis showed that the product possessed high heat resistance.