摘要
以均苯四甲酸二酐(均酐),3,3',4,4'-二苯酮四羧酸二酐(酮酐)和芳香二胺单体3,5-二氨基-4'-甲基-二苯基醚为初始原料,通过改变均酐与酮酐物质的量的比例,通过低温缩聚和热亚胺化合成一系列高分子量的聚酰亚胺,并用红外光谱、XRD图谱、元素分析等手段表征其结构,该系列聚合物在强极性溶剂中具有较好的溶解性,而且在较宽的光谱范围内具有良好的透明性,力学性能测试表明这些聚酰亚胺薄膜具有较好的力学性能,而且拉伸强度、弹性模量随着均酐组分含量的增加而明显提高。
A series of high molecular weight polyimides（ PIs） with different intrinsic viscosity were synthesized via changing the ratio of dianhydride（ PMDA / BTDA） acted with 3,5-diamino-4＇-methyl diphenylether（ AMPE）at a low temperature polycondensation and thermal imidization. The structures and properties of PIs were studied by using IR,XRD,UV-vis and mechanical measurement. The as-obtained polyimides possessed good solubility in many strong polar solvents such as DMAc,NMP and DMF. The polymer films also exhibited high transparency with an ultraviolet – visible absorption cut-off wavelength in the 330 ～ 360 nm range. The mechanical performance test showed that the polyimide film with good mechanical properties and tensile strength,elastic modulus was significantly improved with increasing PMDA component content.
出处
《东华理工大学学报（自然科学版）》
CAS
2016年第1期91-95,共5页
Journal of East China University of Technology(Natural Science)
基金
国家自然基金项目(21264001)
江西省教育厅项目(GJJ14471)
关键词
低温缩聚
聚酰亚胺
甲苯氧侧链
机械性能
low temperature polycondensation
Aromatic polyimide
methylphenoxy group
mechanical properties
