CAJ | 학술논문

以二苯硫醚二酐(TDPA)3种异构体的混合物(m-TDPA)和3,3',4,4'-三苯双醚四甲酸二酐(HQDPA)为二酐单体，4,4'-二氨基二苯醚(ODA)为二胺单体，邻苯二甲酸酐(PA)为封端剂，采用不同二酐比例通过一步法聚合制备了一系列热塑性聚硫醚酰亚胺共聚物，粘度控制在0.42~0.43 dL/g，并对其热性能、溶解性、熔体性能、力学性能进行分析。结果表明：制备的共聚物耐热性良好，玻璃化转变温度(Tg)为230~246℃，5%热分解温度在516~539℃，力学性能优异，在N-甲基吡咯烷酮(NMP)、N,N-二甲基乙酰胺(DMAc)和氯仿等极性溶剂中有良好的溶解性。引入HQDPA进行共聚可以提高共聚物的热稳定性和耐溶剂性，显著降低熔体粘度，共聚物具有良好的熔体流动性和熔体稳定性。
이이분류미이항(TDPA)3충이구체적혼합물(m-TDPA)화3,3',4,4'-삼분쌍미사갑산이항(HQDPA)위이항단체，4,4'-이안기이분미(ODA)위이알단체，린분이갑산항(PA)위봉단제，채용불동이항비례통과일보법취합제비료일계렬열소성취류미선아알공취물，점도공제재0.42~0.43 dL/g，병대기열성능、용해성、용체성능、역학성능진행분석。결과표명：제비적공취물내열성량호，파리화전변온도(Tg)위230~246℃，5%열분해온도재516~539℃，역학성능우이，재N-갑기필각완동(NMP)、N,N-이갑기을선알(DMAc)화록방등겁성용제중유량호적용해성。인입HQDPA진행공취가이제고공취물적열은정성화내용제성，현저강저용체점도，공취물구유량호적용체류동성화용체은정성。
Using three isomeric diphenylthioether dianhydrides (m-TDPA) and 3,3',4,4'-hydroquinone diphthalic dianhydride(HQDPA) as dianhydride monomers, 4,4′-diamino diphenyl ether (ODA) as bisamine monomer, phthalic anhydride(PA) as blocking agent, we synthesized a series of thermoplastic copolyimide by one-step method with different dianhydride monomers ratio. The viscosity was controlled in 0.42~0.43 dL/g, and the thermal property, solubility, rheological, and mechanical properties of the copolyimides were analyzed. The results show that the copolyimides have good heat resistance and excellent mechani-cal properties, and their glass transition temperature(Tg) is 230~246℃, while their decomposition tempera-ture at 5% weight loss is 516~539 ℃. The copolyimides have good solubility in polar solvent such as NMP, DMAc, and CHCl3. Because of the introduction of HQDPA to copolymerization, the solvent resis-tance and thermal stability of the copolyimides increase, and the melt viscosity decreases significantly. The copolyimides have excellent melt fluidity and melt stability.