摘要
用含有扭曲非共平面结构的二胺1,3-二(3-氨基苯氧基-4'-苯酰基)苯(BABB)与均苯四甲酸二酐(PMDA)缩聚制备了具有3种不同分子量的均苯型热塑性聚酰亚胺模塑粉,并研究了其组成、聚集态结构、熔体黏度、稳定性和热性能,将模塑粉模压成型后进行机械性能测试.结果表明,引入柔性的二胺,模塑粉的玻璃化转变温度(Tg)与传统的均苯型聚酰亚胺相比明显下降,熔体黏度大幅度下降,且具有良好的熔体黏度稳定性.同时,均苯四甲酸酐的存在保证了该模塑粉具有优异的热稳定性和优异的机械性能及较低的吸水率.
To improve the processability of the polyimide molding powder, a novel molding powder with twis- ted structure was prepared with 1,3-bis [ 4-（3-aminophenoxy）benzoyl] benzene （BABB） and pyromellitic dian- hydride（PMDA）. The component, morphological structure, melt viscosity, thermal stability of molding pow- der and the mechanical properties of molding products were studied. The results show that the glass-transition temperature and melt viscosity of molding powder reduce markedly, compared with the traditional polyimides, because of the introduction of the flexible structures hibited excellent melt viscosity stability and thermal mechanical properties and lower water absorption. in polymer main chain. The polyimide molding powder ex- stability. The molding products also possessed outstanding
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2012年第10期2356-2360,共5页
Chemical Journal of Chinese Universities
基金
国家“九七三”计划项目(批准号:G2010CB631100)
国家技术支撑计划(批准号:2011BAA06B03)资助
关键词
聚酰亚胺
模塑粉
熔融加工
Polyimide
Molding powder
Melt processing
