摘要
以碱为催化剂,通过间乙炔基苯基重氮硫酸盐和酚醛树脂间的偶合反应,制备了间乙炔基苯偶氮酚醛树脂(EPAN)。树脂的固化由乙炔基的热加成反应实现,无需外加固化剂。该树脂具有固化反应活性高,耐热性好,残碳率高的特点。为了进一步改善该树脂的工艺性,合成了炔丙基基团官能化的乙炔基苯偶氮酚醛树脂(PEPAN),研究了该树脂的工艺性、固化行为以及热性能。研究结果表明,与EPAN相比,树脂的工艺性得到进一步提高,加工窗口明显变宽,树脂固化物的耐热性明显提高,其5%失重温度(Td5)约为432℃,800℃残碳率约为74%。
Ethynyl phenyl azo novolac resin (EPAN) was synthesized by coupling reaction between 3-ethynyl phenyl diazonium sulfate and novolac resin in presence of base as catalyst. EPAN resin can cure via thermal polymerization reaction of its ethynyl groups without adding other cure agent. The resin possesses high cure reactivity, good heat-resistant property and high char yield value at high temperature. Propargyl-functional ethynyl phenyl azo novolac resin (PEPAN) was prepared to improve the processability of EPAN...
出处
《宇航材料工艺》
CAS
CSCD
北大核心
2008年第3期49-53,共5页
Aerospace Materials & Technology
关键词
酚醛树脂
加成固化
工艺性
耐热性
Phenolic resin
Addition-Curable
Processing ability
Heat-Resistant property
