【摘要】 本文研究了2种不同分子质量聚苯醚(PPE)与环氧树脂(EP)体系的固化行为以及体系的相容性。结果表明:低分子质量聚苯醚(L-PPE)与环氧树脂的固化反应活性远高于高分子质量聚苯醚(H-PPE)。环氧树脂/高分子质量聚苯醚体系的相容性较差,固化物发生明显的相分离;环氧树脂/低分子质量聚苯醚体系具有良好的相容性,固化体系相态均一,具有单一的玻璃化温度。随着低分子质量聚苯醚含量的增加,环氧树脂/低分子质量聚苯醚体系的玻璃化温度升高,tanδ峰增强、固化温度升高、固化反应热减少。更多还原

【Abstract】 Curing behavior and compatibility of epoxy resins and two polyphenylene ethers( PPE) with different molecular weight were studied by infrared spectroscopy,differential scanning calorimetry,scanning electron microscopy and dynamic mechanical thermal analyzer. The results showed that the reactivity of low molecular weight PPE( L- PPE) and epoxy( EP) was far higher than that of high molecular weight PPE( H- PPE) and epoxy. The compatibility between EP and H- PPE was poor and the phase separation phenomenon of cured product was obvious. The EP / L- PPE system showed homogenous phase and single glass transition temperature( Tg) due to the better compatibility of EP and L- PPE. The Tg,tan δ peak and curing temperature of EP/L- PPE system were increased and the curing reaction heat of EP / L- PPE system was decreased with the increasing of L- PPE content.更多还原