In this paper, PBA resin and pulps have been prepared directly by solution polycondensation and precipitation, separately.
本文采用直接缩聚法制备pBA树脂，用沉析法制备p BA浆粕。
Modified meta-aramid(PMIA) copolymer with TPC mole fraction of 0.05~0.15 was prepared by low-temperature-solution polycondensation in DMAc.
采用低温溶液法共缩聚反应合成了对苯二甲酰氯（TPC）摩尔分数为0.05~0.15的改性间位芳香族聚酰胺（ PMIA）共聚物。
The thermotropic liquid crystalline block copolyesters with flexible space group in main chain were synthesized via solution polycondensation.
用溶液缩聚法合成了含柔性间隔基的嵌段热致液晶共聚酯。
The thermotropic liquid crystalline block copolyesters with flexible space group in main chain were synthesized via solution polycondensation.
用溶液缩聚法合成了含柔性间隔基的嵌段热致液晶共聚酯。
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