摘要
研究了对苯二胺与对苯二酰氯在N-甲基吡咯烷酮/氯化钙体系中加入3,4’-二氨基二苯醚为第三单体的三元共聚反应。考察反应时间、反应温度、第三单体用量、单体浓度和CaCl_2用量对共聚物对数粘度的影响。结果表明,在N-甲基吡咯烷酮/氯化钙溶剂体系中,单体浓度为(0. 35~0. 40) mol·L~(-1),单体物质的量分数为25%,首先将温度设定为(-10~-5)℃,待溶液黏稠时将温度升高到(75~80)℃,时间(60~80) min,CaCl_2与-2NH_2物质的量比0. 4~0. 6时,可获得高比浓对数粘度的聚合物。
Copolymer of p-phenylenediamine and terephthaloyl dichloride in solvent of N-methyl pyrrolidone/CaCl_2 was investigated with 3,4'-diaminodiphenyl ether added as a third monomer. Effects of reaction time,reaction temperature,dosage of the third monomers,concentration of monomer and dosage of CaCl_2 on inherent viscosity of the copolymer were discussed. Results showed that polymer of high inherent viscosity was obtained when monomer concentration was(0. 35 ~ 0. 40) mol · L~(-1) and monomer mass fraction was 25% in solvent of N-methyl pyrrolidone/CaCl_2. Temperature was set to(-10 ~-5) ℃and rose to(75 ~ 80) ℃ when solution was viscous,and molar ratio of CaCl_2 to-2NH_2 was 0. 4 ~ 0. 6.
引文
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