摘要
采用差示扫描量热(DSC)法和热重(TG)分析法考察了双环戊二烯(DCPD)/苯乙烯(St)共聚树脂在N2中的热分解过程,并根据Friedman法(多加热速率法)和Kissinger法(代替高解析法)计算出热分解反应的动力学参数。在动力学研究的基础上,对DCPD/St共聚树脂使用寿命进行了预测。结果表明:DCPD/St共聚树脂的热分解反应过程大致可分为前期(失重率≤20%)、中期(失重率为30%～80%)和后期(失重率≥90%)3个阶段,前期和中期反应可以认为是1级反应,中期反应的平均活化能为150.43 kJ/mol;热分解温度随着升温速率的增加而提高,热分解反应活化能随着失重率的增加而增大;当温度低于200℃时,DCPD/St共聚树脂具有较好的热稳定性。
The pyrolysis process in N2 of the （licyclopentadiene（DCPD）/styrene（St） copolymer was investigated by differential scanning calorimetry （ DSC ） and thermogravimetry （TGA）, and the kinetics parameters of pyrolytic reaction were calculated by Friedman method（different heating speed method） and Kissinger method（sut）stitute of high-resolution method ）.The usefid time of the DCPD/St copolymer was forecasted based on the dynamics research. The results showed that the pyrolytic reaction process of the DCPD/St copolymer could be divided into three stages： prophase stage （mass loss rate≤20%）, metaphase stage（mass loss rate between 30% and 80% ） and anaphase stage（mass loss rate ≥ 90%）. The prophase or metaphase reaction could think first order reaction,the average activation energy of metaphase reaction was 150.43 k J/mol. The temperature of pyrolysis was increased with increasing heating speed,and the activation energy of pyrolysis reaction was increased with increasing mass loss rate. The DCPD/St copolymer had well thermal stability when the temperature was under 200 ℃.
出处
《中国胶粘剂》
CAS
北大核心
2010年第8期10-14,共5页
China Adhesives
基金
浙江省教育厅基金项目(Y200804661)
浙江省高校优秀青年教师资金资助项目
关键词
双环戊二烯
苯乙烯
共聚
热重分析
动力学
参数
寿命
预测
DCPD
styrene
copolymerization
thermogravimetry（TGA）
dynamics
parameter
useful time
forecast
