摘要
以4,4'-二氨基二苯砜(DDS)为固化剂,采用非等温示差扫描量热法(DSC)研究了联苯酚醛环氧树脂(BPNE)的固化动力学。通过外推法确定了体系的固化工艺。采用Kissinger、Ozawa法计算出固化体系的表观活化能,根据Crane理论计算得到该体系的固化反应级数。采用DSC,热重分析(TGA)研究了固化物的耐热性。结果表明:BPNE的固化工艺为160℃/2h+200℃/2h+230℃/2h;固化反应的活化能约为61.86kJ/mol,指前因子为5.27×105min-1,反应级数为1.1;玻璃化转变温度(Tg)为167℃,其10%热失重温度为398.1℃,800℃残炭率为29.37%,与双酚A环氧树脂/DDS固化物相比,分别提高了22℃,11.71%。
The curing kinetics of biphenyl novolac epoxy resins（BPNE） using 4,4＇-diamino biphenyl sulfone（DDS） as curing agent was investigated by non-isothermal differential scanning calorimetry（DSC）.The curing process was determined by extrapolation.The apparent activation energy was calculated using Kissinger and Ozawa methods.The reaction order of curing reaction was determined based on Crane formula.The heat resinstance of cured BPNE /DDS was studied by DSC and TGA.The results showed that the curing process was as follows：160 ℃ /2 h ＋ 200 ℃ /2 h ＋ 230 ℃ /2 h.The apparent activation energy,preexponential factor Arrhenius parameters（A） and reaction order of curing reaction were 61.86 kJ/mol,5.27 × 105 min-1 and 1.1 respectivly.The glass transition temperature（Tg）,10% weight loss temperatures and char yield at 800 ℃ of cured system were 167 ℃,398.1 ℃and 29.37%,respectivly.The later two datas were increased by 22 ℃,11.71% than that of bisphenol A epoxy resins/DDS sysytem.
出处
《热固性树脂》
CAS
CSCD
北大核心
2010年第4期5-8,共4页
Thermosetting Resin
基金
湖南省科技厅科技计划项目(2008FJ3116)资助
关键词
联苯酚醛环氧树脂
固化动力学
非等温固化
热性能
biphenyl novolac epoxy resin
curing kinetics
non-isothermal curing
thermal property
