PPE/TAIC体系的相行为和固化动力学特征

Phase Behavior and Curing Kinetics Characteristics of PPE/TAIC System

分析了聚苯醚(PPE)/三烯丙基异氰酸酯(TAIC)体系的相图.结果表明,PPE/TAIC体系具有最高上临界温度行为,在所研究的范围内,相分离是完全可逆的.玻璃化转变温度(Tg)线和浊点曲线在PPE含量约为60%(质量分数,下同)时相交,当PPE含量小于60%时,PPE/TAIC体系的玻璃化温度约为323K;当PPE含量大于60%时,在整个温度范围内,溶液是均匀的,不会出现相分离.根据原子力显微镜(AFM)实验及其推理,固化后的PPE/TAIC体系是通过反应诱发旋节线分离而产生相态的,它具有优异的耐化学药品性.采用红外(FTIR)和程序升温的微差扫描量热(DSC)法,研究了PPE/TAIC体系的固化反应和固化动力学特征.

The phase diagram of PPE/TAIC （ poly （2,6-dimethy-1,4-phenylene ether）/triallylisocyanurate） systems is analyzed in this paper. The results show that （1） the system possesses an upper critical solution temperature （UCST） behavior and its phase separation is completely reversible in all investigated blends; （2） the curve of the vitrification point （Tg） intersects with that of the cloud point at a PPE content （mass fraction, below the same） of about 60% ; and （3） when the PPE content is less than 60%, the value of Tg of the system is about 323 K, and when the PPE content exceeds 60%, the system becomes homogeneous and no phase separation occurs in the whole temperature range. Moreover, according to the experiments carried out by the atom force microscope （AFM） and based on relevant inferences, the cured PPE/TAIC system possessing a morphology via the reaction-induced spinodal decomposition exhibits good chemical resistance. The curing reaction and curing kinetics characteristics of PPE/ TAIC system are also investigated by FTIR spectra and the program-heated DSC method, focusing on the practical fabrication process of a copper clad laminate.