过氧化苯甲酰在液态聚碳硅烷交联中的应用  

Application of dibenzoyl peroxide in cross-linking of a liquid polycarbosilane

作　　者：余兆菊[1] 黄木河[1,2] 李然[1,2] 詹俊英[1] 何国梅[1] 丁马太[1,3] 夏海平[1,2] 

机构地区：[1]厦门大学材料学院,特种先进材料实验室,福建厦门361005 [2]厦门大学化学化工学院,福建厦门361005 [3]龙岩学院化学与材料工程学院,福建龙岩364000

出　　处：《功能材料》2009年第12期2058-2060,共3页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(50802079,50532010);航空科学基金资助项目(2008ZH68005);福建省自然科学基金资助项目(2008J0165)

摘　　要：聚碳硅烷热解前的交联对于提高其最终陶瓷产率至关重要。研究了过氧化苯甲酰(BPO)引发液态超支化聚碳硅烷(HBPCS)的交联反应对于陶瓷产率的影响。FT-IR和GPC证实,添加为0.5%～2.0%(质量分数,下同)的BPO,即可在80～140℃下引发HBPCS交联;在考察的实验条件下,提高交联温度、延长反应时间或增加BPO用量,均可提高HBPCS交联程度。BPO用量为2.0%时,HBPCS交联样品在1000℃下的陶瓷产率高达65%,比未加BPO的提高25%。In order to increase the final ceramic yield, the cross-linking of polycarbosilane prior to its pyrolysis is very important. In this paper, benzoyl peroxide (BPO) was used to initiate the cross-linking of a hyperbranched liquid polycarbosilane (HBPCS), and the influence of the cross-linking on the ceramic yield was studied. The results indicate that the cross-linking was successfully initiated at 80-140°C with the weight ratio of BPO to HBPCS of 0.5%-2.0%, which was conformed by means of Fourier transform infrared (FT-IR) and gel permeation chromatography (GPC). It was found that higher reaction temperature, longer reaction time or more BPO content improves the cross-linking reaction under the investigated reaction conditions. The ceramic yield of cross-linked HBPCS intiated by 2.0% BPO reached 65%, which is 25% higher than that of HBPCS without BPO.

关 键 词：过氧化苯甲酰 聚碳硅烷 交联 碳化硅 

分 类 号：TQ174.4[化学工程—陶瓷工业] TB324[化学工程—硅酸盐工业]