摘要
苯甲醛和对羟基苯甲醛分别与双酚A反应,得到侧链含刚性苯环的酚醛树脂,然后环氧化,制备了侧链含刚性苯环的多官能度酚醛环氧树脂。以FT-IR1、H-NMR及GPC表征了环氧树脂的分子结构。以4,4′-二氨基二苯砜为固化剂,对环氧树脂固化物的热力学性能及热降解性能进行了研究,结果表明:由对羟基苯甲醛与双酚A反应制备的多官能度酚醛环氧树脂固化物的玻璃化转变温度、力学及耐热降解性能均比苯甲醛制备的酚醛环氧树脂固化物高,环氧树脂官能度的增加能提高环氧树脂固化物的综合性能。
Two multifunctional novolac epoxy resins were synthesized via the condensation of bisphenol A with benzaldehyde and p-hydroxyphenylaldehyde, respectively, followed by the epoxidation of the resulting novolacs with excess epichlorohydrin. The structures of the synthesized multifunetional novolac epoxy resins bridged with methine-phenyl were characterized using FT-IR, 1H-NMR spectra, and GPC. The thermomechanical properties, thermal stability, and moisture resistance of the synthesized epoxy resins cured with 4, 4＇-diarninodiphenyl sulphone （DINS） were investigated by DMTA, and TGA measurement. It is concluded that the storage modulus and glass transition temperatures of p-hydroxyphenylaldehyde novolac epoxy network are higher, and the thermal stability and moisture resistance are better than that of benzaldehyde novolac epoxy network.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2008年第10期41-44,共4页
Polymer Materials Science & Engineering
关键词
双酚A
苯甲醛
对羟基苯甲醛
环氧树脂
bisphenol-A
benzaldehyde
p-hydroxyphenylaldehyde
epoxy resin
