作　　者： ; ; ; ; ;

机构地区： 华南理工大学化学与化工学院

出　　处： 《高校化学工程学报》 2006年第5期759-762,共4页

摘　　要： 用等温差示扫描量热法和红外光谱(FT-IR)研究了聚苯醚(PPE)/环氧树脂(EP)体系的固化反应,得出了固化反应程度与反应时间的关系曲线,结果表明在所研究的温度范围内,等温固化温度越高,PPE/EP体系的反应速率越快,最终的反应程度越高。红外的研究结果表明,在180℃固化2h后,EP不能固化完全,这是由于在固化过程中,伴随着体系的凝胶及EP分子量的逐步增加,引起体系的粘度增大所致。采用扫瞄电子显微镜和综合热分析仪,分别研究了PPE/EP混合物固化材料的形态和耐热性。研究结果表明在PPE/EP体系中加入TAIC(triallylisocyanurate)可有效地提高体系的耐化学药品性,但体系的耐热性也将随着TAIC的加入降低;PPE/EP混合物的耐热性随着PPE含量的增加而提高。 The curing reactions of poly （2, 6-dimethy-1, 4-phenylene ether） / epoxy （PPE / EP） systems were studied by isothermal differential scanning calorimeter （DSC） and FT-IR spectra. The α-t （reaction rate vs reaction time） curves at different temperatures were obtained. The results indicate that in the investigated temperature range, the higher isothermal curing temperature results in higher reaction rate and higher ultimate conversion. The result of FT-IR spectra shows that several epoxide groups remain unreacted after 2h of curing at 180℃. This phenomenon can be ascribed to the increase of the bulk viscosity of the system which is caused by the gelation and increase of the average molecular weight of the epoxy during curing reaction. The cured morphology and thermal stability of the PPE/EP blends were studied by scanning electron microscope and multi-thermal analyzer, respectively. Adding TAIC（triallylisocyanurate） to PPE/EP systems can improve its solvent resistance, but the thermal stability of the blends is decreased. The thermal stability of the PPE/EP blends is increased with the increase of PPE contents.

关 键 词： 聚苯醚 环氧树脂 形态 耐热性 固化行为

领　　域： [化学工程] [化学工程]