摘要
以煤沥青为单体、对甲基苯甲醛(PM B)为交联剂,在对甲苯磺酸的催化作用下合成缩合多核芳烃(COPNA)树脂。采用FT-IR和1H-NM R研究其反应机理;采用SEM分析不同时间该COPNA树脂的形貌;采用TG-DSC研究该COPNA树脂的热行为。研究表明,煤沥青能与PM B合成COPNA树脂,其反应机理为酸催化下的阳离子型缩聚反应;COPNA树脂的合成中出现很多微纤,随交联聚合程度的加深,微纤相互缠结并融合;COPNA树脂具有很好的耐热性和较高的炭收率。
The condensed polynuclear aromatic （COPNA） resin is synthesized using coal tar pitch as monomer and p-methyl benzaldehyde （PMB） as cross-linking agent in the presence of ptoluene sulfonic acid. Reaction mechanism was studied using FT-IR and 1^H-NMR. The morphologies of COPNA resin were inspected by SEM. TG-DSC was employed to study the thermal behavior of COPNA resin. The results show that coal tar pitch and PMB can be used to synthesize COPNA resin, the reaction mechanism of which is a positive ion-typed condensation polymerization catalyzed by acid. There exist many micro fibers with a uniform distribution in the COPNA resin. The fibers grow with increase of modification time, and then intertwist and amalgamate. Moreover, the COPNA resin possesses good thermo-stability and high coke value.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2006年第5期102-104,108,共4页
Polymer Materials Science & Engineering
基金
国家自然科学基金(50472081)
