双酚A型聚芳酯/半芳香族聚酰胺共聚物的合成与性能

Synthesis and Properties of Bisphenol-A Polyarylester/Semi-Aromatic Polyamide Random Copolymers

以双酚A(BPA)、1,6-己二胺(HMDA)、对苯二甲酰氯(TPC)、间苯二甲酰氯(IPC)为单体,采用相转移界面缩聚法,通过改变单体的物质的量配比,合成了系列双酚A型聚芳酯-半芳香族聚酰胺(PAR/PA)共聚物,并对聚合物的结构与性能进行了表征。结果表明,随着主链中聚对苯二甲酰-1,6-己二胺(PA6T)结构单元的增加,聚合物的玻璃化温度(Tg)呈现鞍马形变化,熔融温度(Tm)降低,而热分解温度(Td)变化不大。半芳香族尼龙结构单元的引入,使聚合物呈结晶聚集态。

A series of bisphenol-A polyarlester （PAR） and semi-aromatic polyamide random copolymers （ PAR-A- co-PA6T/PA6I） were synthesized by interracial polycodensation of bisphenol-A（BPA）, 1,6-hexamethylenediamine, terephthaloyl chloride（TPC） and isophthaloyl chloride（IPC）,which was catalyzed by the phase transfer catalyst. The unit ratio of PAR-A, PA6T and PA6I in the main chain of product can be modified bychanging the molar ratio of monomers. The copolymers were characterized by FT-IR, 1H_NMR, WAXD, TGA and DSC. The results show that the glass transition temperature（Tg） of the copolymers is in the range of 161 ℃- 183 ℃, the decomposition temperature （Td） at 5% mass loss is from 325 ℃ to 349 ℃ and the melting temperature（Tin） is between 240 ℃ and 290 ℃. Tg of the PAR/PA6I/PA6T copolymers arrives at top and then descents with increasing the mole ratio of TPC in the monomer. The introduction of semi-aromatic polyamide units makes the co-polymer show crystal state.