新型苯并环丁烯封端的聚醚酰亚胺的合成与表征

Synthesis and Characterization of Novel Benzocyclobutene-Terminated Polyetherimide Resins

合成了4种不同相对分子质量的含双酚A醚结构的新型苯并环丁烯封端的聚醚酰亚胺树脂,并用质谱、傅里叶变换红外光谱、核磁共振氢谱、凝胶渗透色谱、差示扫描量热及热重分析表征其结构和性能。研究结果表明,树脂的相对分子质量对其固化反应、固化产物的玻璃化转变温度和热性能等均有影响。随树脂相对分子质量的增加,树脂的玻璃化转变温度提高,其起始固化温度提高,而固化产物的玻璃化转变温度则降低,固化产物的热分解温度提高。所合成的聚醚酰亚胺树脂显示出优良的加工性能和耐热性能。

A series of benzocyclobutene-terminated polyetherimide resins were prepared and characterized by means of MS, FTIR, H NMR and GPC. The polyetherimide resins and their cured products were investigated by means of DSC and TGA. Effects of relative molecular mass of polyetherimide resins on initial curing temperature, glass transition temperature （ Tg ） of the resins and initial decomposition temperature （ Tdi ） of cured products were studied. Tg and initial curing temperature of the resins, and Tdi of cured products increased with increasing of relative molecular mass of resins while Tg of the cured products decreased. The benzocyclobutene terminated polyetherimide resins had good processing performance and thermal stability.