Curing behavior of Azo‐containing twin liquid crystalline epoxy resins with anhydride
Curing behavior of Azo‐containing twin liquid crystalline epoxy resins with anhydride
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DOI：
10.1002/pen.22073
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发表时间：
2012-06
影响因子：
3.2
通讯作者：
Dewen Zhou;Mangeng Lu;Liyan Liang;Tengfei Shen;Xiao Wanping
中科院分区：
文献类型：
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作者：
Dewen Zhou;Mangeng Lu;Liyan Liang;Tengfei Shen;Xiao Wanping
采用非等温差示扫描量热法（DSC）研究了一系列新型偶氮双液晶环氧单体与酸酐的固化反应动力学。结果表明，相行为对固化反应活化能Ea影响很大，Ea随固化反应进程先增大后迅速减小。化学动力学控制和扩散控制机制共同主导固化，这给出了大的Ea值。偶氮基团也起到催化剂的作用，加速固化反应。通过偶氮掺杂固化体系的紫外-可见吸收光谱（366 nm和475 nm处的吸光度值随固化反应过程而变化）证实了固化机理。Polym.工程索引，2012.© 2012年塑料工程师协会
A series of novel azo-containing twin liquid crystalline (LC) epoxy monomers were cured with anhydrides without extra catalyst, and the curing kinetics was investigated by non-isothermal differential scanning calorimetry (DSC) technique. The results showed that the effect of phase behavior on activation energy (Ea) was enormous, which increased first and then decreased quickly with the curing reaction processing. The chemical kinetic control and diffusion-control mechanisms dominate the curing together, which gives large values of Ea. Azo group also served as a catalyst to accelerate the curing reaction. The curing mechanism was confirmed by the UV–Vis spectra of azo-doped curing system in which the absorbance values at 366 nm and 475 nm changed with the curing reaction processing. POLYM. ENG. SCI., 2012. © 2012 Society of Plastics Engineers