二乙烯基苯-煤沥青COPNA树脂的合成及性能研究  

Study on the Synthesis and Properties of Condensed Polynuclear Aromatics Resin Using Coal Tar Pitch as Monomer and Divinylbenzene as Cross-Linking Agent

作　　者：林起浪[1] 李铁虎[1] 

机构地区：[1]西北工业大学材料科学与工程学院,陕西西安710072

出　　处：《西北工业大学学报》2001年第4期562-566,共5页Journal of Northwestern Polytechnical University

基　　金：航空科学基金 (96 G5 30 93)

摘　　要：以煤沥青为单体 ,二乙烯基苯 (DVB)为交联剂 ,在对甲苯磺酸 (PTS)的催化作用下合成缩合多核芳烃 (COPNA)树脂。采用傅立叶 -红外光谱 (FT- IR)和核磁共振氢谱 (1H- NMR)研究其反应机理 ;采用差示扫描量热法 (DSC)和热解重量分析法 (TGA)研究 COPNA树脂固化反应及热稳定性。研究表明 :煤沥青能够与 DVB合成 COPNA树脂 ,其反应机理为酸催化下的阳离子型缩聚反应 ;B阶 COPNA树脂固化反应平稳易于控制 ,表观活化能 (Ea)为 1 7.0 6 k J/mol;C阶 COPNA树脂耐热性优良 ,在氮气中的热降解起始温度达 45 0℃。We synthesize the condensed polynuclear aromatic (COPNA) resin using coal tar pitch as monomer and divinylbenzene (DVB) as cross-linking agent in the presence of p-toluene sulfonic acid (PTS). Reaction mechanism is studied using Fourier transform infra-red (FT-IR) and 1H nuclear magnetic resonance ( 1H-NMR) spectroscopy technologies. Furthermore, differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) are employed to study curing reaction and thermo-stability of COPNA resin. The results show that coal tar pitch and DVB can be used to synthesize COPNA resin, the reaction mechanism of which is a positive ion-typed condensation polymerization catalyzed by acid. The curing reaction of B stage COPNA resin can be easily controlled and apparent activation energy (Ea) is 17.06 kJ/mol. Moreover, C stage COPNA resin possesses good thermo-stability as indicated by that initial thermal decomposition temperature arrives at 450℃ in nitrogen.

关 键 词：煤沥青 DVB COPNA 反应机理 固化反应 热稳定性 二乙烯基苯 缩合多核芳烃树脂 合成 热固性树脂 

分 类 号：TQ323[化学工程—合成树脂塑料工业]