摘要
采用差示扫描量热(DSC)和热失重分析(TGA)研究了含萘环结构的氰酸酯树脂的固化反应和耐热性能.结果表明,2,7-二氰酸酯基萘(DNCY)树脂结构中由于萘环具有较强的吸电子效应,使DNCY的氰基反应活性和双酚A二氰酸酯(BACY)及对苯二酚二氰酸酯(DBCY)的氰基相比有所降低,DNCY树脂固化反应的活化能高达109.4 kJ/mol;萘环的引入使氰酸酯树脂的耐热性能和耐热氧化性能得到了明显改善,尤其是树脂的耐热氧化性能;芳香环的存在降低了树脂体系高温阶段的热分解和热氧化分解的速率.
The cure reaction and thermal properties of a novel dicyanate ester resin containing naphthalene ring were characterized by differential scanning calorimetry （DSC） and thermogravimetric analysis （TGA）. The cure reaction and thermal properties of 2,7-dihydroxynaphthalene dicyanate （DNCY） are obviously different from biphenol A dicyanate （BACY） and 1,4-dihydroxybenenze dicyanate （DBCY） because of existence of naphthalene in the structure of dicyanate ester resin. The cure reactive activation of cyanide group （CN） in the structure of DNCY is lower than those of CN groups in the structure of BACY and DBCY because of stronger electro-attracting ability of naphthalene ring, and its energy value （109.4 kJ/mol） is higher than those of BACY and DBCY. The thermal and thermal-oxidative stabilities are ameliorated due to the introduction of naphthalene ring for dicyanate ester resins, and naphthalene ring plays a more important role towards the thermal-oxidative stability than the thermal stability. The existence of aromatic ring reduces the rates of thermal and thermal-oxidative decomposability during high temperature stage.
出处
《浙江大学学报（工学版）》
EI
CAS
CSCD
北大核心
2008年第2期274-277,共4页
Journal of Zhejiang University：Engineering Science
关键词
氰酸酯树脂
萘环
固化反应
耐热性能
cyanate ester resin
naphthalene ring, cure reaction
thermal property
