含异丙基和联苯结构可溶性聚酰胺的合成与表征

Synthesis and Characterization of Soluble Polyamide Containing Isopropyl Groups and Biphenyl Structures

一种新型含异丙基和大侧基联苯结构二胺单体3,3'-二异丙基-4,4'-二氨基苯基-4″-苯基甲苯(PAPT),与3种二酐通过Yamazaki膦酰化法缩聚制得3种聚芳酰胺薄膜。研究表明,聚合物具有良好的溶解性能,常温下能溶于N-甲基吡咯烷酮(NMP)、N,N-二甲基甲酰胺(DMF)、二甲基亚砜(DMSO)、N,N-二甲基乙酰胺(DMAc)等溶剂;具有突出的热性能,玻璃化转变温度均高于209℃,氮气氛围下10%热失重温度高于465℃;光学性能优良,截止波长范围在317~338nm,透过率超过80%的波长都大于445 nm。

Three kinds of aromatic polyamide films （PAs） were prepared using new diamine monomer 3,3′-diisopropyl-4,4′-diaminophenyl-4″-phenyltouene （PAPT） and three aromatic dicarboxylic acids by Yamazaki phosphorylating method. These results show PAs have good solubility in organic solvents at room temperature, such as N-methyl pyrrolidone（NMP）, N,N-dimethylformamide（DMF）, dimethyl sulfoxide（DMSO） and N,N-dimethylacetamide（DMAc）. Moreover, they have outstanding thermal properties with the glass transition temperature and 10% mass loss temperature higher than 209 ℃ and 465 ℃ respectively. Furthermore, they also present excellent optical properties with the cutoff wavelength ranges of 317～338 nm, and the wavelengths of 80% transmittance more than 445 nm.