一类新型杂环聚芳酰胺的合成与性能研究

SYNTHESIS AND PROPERTIES OF NOVEL SOLUBLE HETEROCYCLIC POLYAMIDES

采用二氮杂萘类双酚 4 (4 羟基苯基 ) 2 ,3 二氮杂萘 1 酮 (DHPZ)与对氯苯腈反应制得二腈化合物 ,进一步水解为二酸 .以此新型二酸与不同二胺聚合制得的聚芳酰胺均具有较高的耐热性能 ,其Tg 在 2 91～318℃ ,且易溶于极性非质子溶剂中 .聚合物的特性粘数为 1 17～ 1 5 0dL g(2 5℃ ,0 5 %inNMP) ,对所得聚酰胺进行性能研究 ,其拉伸强度为 71～ 86MPa ,断裂伸长率为 8%～ 13% ,拉伸模量为 0 86～ 1 0 2GPa ,电阻系数数量级为 10 1 4～

1,2-Dihydro-2(4-carboxylphenyl)-4-[4-(4-carboxylphenonxyl)phenyl]-phthalazin-1-one, a novel diacid monomer containing the phthalazinone moiety were synthesized based on the novel bisphenol 4-(4-hydroxyphenyl)-2,3-phthalazionone-1 (DHPZ) synthesized by our research group. The novel diacid was used to synthesize polyamides with different aromatic diamines using Yamazaki method. The structure of monomers and polymers was studied through FTIR, H-1-NMR, the results showed that the structures of the monomers and polymers were in accordance with our design. The polymers have inherent viscosity of 1.17 similar to 1.50 dL/g(25degreesC, 0.5% in NMP) and are soluble in polar aprotic solvents such as DMAc, NMP etc. The T(g)s of the polyamides were all above 280degreesC The aromatic polyamide films had tensile strength of 72 similar to 87 MPa, elongation at break of 8% similar to 13% and tensile modulus of 0.8 similar to 1.0 GPa. The order of the coefficient of electrical resistance is 10(14) similar to 10(16). The result showed that the polyamides have the combination of excelllent thermal property, solubility, mechanical property and electrical resistance property.