MM-HPPZ/DNA/TPA聚芳酰胺的合成与性能

Synthesis of co-polyamides from MM-HPPZ/NDA/TPA

采用新型的含间甲基取代杂萘联苯结构的二胺2-(4-氨基苯基)-4-[2-甲基-4-(4-氨基苯氧基)]-2,3-二氮杂萘-I-酮为单体,与2,6-萘二甲酸(NDA)进行溶液缩聚制备了新型聚芳酰胺,以对苯二甲酸(TPA)为第三单体对聚芳酰胺进行了共缩聚改性,并研究了TPA的含量及结构对聚芳酰胺性能的影响。n(NDA)/n(TPA)为4∶6时,共聚物特性黏数最大为1.70dL/g。合成的聚芳酰胺具有良好的溶解性,可溶于N-甲基吡咯烷酮、N,N-二甲基乙酰胺等非质子极性溶剂中.玻璃化转变温度大于320℃,5%热失重温度大于435℃。

A series of new co-polyaramides were prepared with the novel diamine 2-(4-aminophenyl)-4 - [2-methyl-4-(4-amino-phenoxy)]-2,3-phthalazin-1-one and 2,6-naphthadicarboxylic acid (NDA) as monomers. The resultant polyaramides were modified with taking terephthalic acid (TPA) as the third component via co-polycondensation. The effects of content and structure of TPA on properties of the polyaramides were studied. The inherent viscosity of the copolymer reached its maximum value 1.70 dL/g when the ratio of n(NDA) to n(TPA) was 4:6. The synthetic polyaramide possessed superior solubility and could be soluble in polar aprotic solvents such as N-methylpyrrolidone and N,N-dimethyl formamide. Its glass transition temperature and weight loss temperature was higher than 320°C and 435°C, respectively.