【作者】 汤明； 余兆菊； 兰琳； 陈立富； 张颖； 张立同；

【Author】 Tang Ming,Yu Zhaoju,Lan Lin,Chen Lifu,Xia Haiping,Zhang Ying,Zhang Litong (Advanced Materials Laboratory,College of Chemistry and Chemical Engineering, Xiamen University,Xiamen,Fujian 361005)

【机构】 厦门大学化学化工学院厦门大学特种先进材料实验室；

【摘要】 在固态聚碳硅烷(PCS)中加入不同质量比的超支化液态PCS,得到固液PCS混合先驱体,对混合先驱体的分子结构和相对分子质量进行了研究;将混合先驱体熔融纺丝和氧化交联,研究液态PCS对纺丝性能和氧化交联性能的影响。结果表明,混合先驱体(超支化液态PCS质量含量20%)的熔融纺丝温度显著降低,从原来的320℃降低到230℃;纺丝性能及连续性显著提高,表面质量提高;加快氧化交联速度,可以缩短交联时间。更多还原

【Abstract】 The blend of solid/liquid polycarbosilanes(PCS) was obtained by mixing different mass ratio of highly branched liquid PCS with solid PCS.The molecular structure and molecular weight of the resultant polymers were studied.The blend precursor was melt-spun and the effects of the liquid PCS on the spinning and oxidation curing were studied.By blending the liquid PCS, the spinning temperature of the solid PCS was significantly lowered,from 320℃(solid PCS) to 230℃(with 20%liquid PCS).The continuity(continuous fiber length) and surface quality of the precursor fiber were significantly improved.The rate of oxidation curing was increased.更多还原