摘要
对含脂肪链聚苯并咪唑的聚合反应进行了比较系统的研究，在此基础上，合成了一系列含脂肪链聚苯并咪唑．以甲酸为溶剂，在减压下，制备了聚合物的均质膜．对聚合物的气体选择透过性能进行了研究，并从化学结构与气体透过性能关系的角度进行了讨论，发现同一聚合物对不同气体的透过系数符合一般玻璃态聚合物的规津；增加柔性链段中亚甲基数目，可提高聚合物的气体透过系数，降低分离系数；刚性链段中引入柔性基因，可增大气体透过系数；温度升高，聚合物的气体透过系数提高，分离系数一般下降．
series of polyalkylenebenzimidazole were synthesized by solution polycondensation and polymeric membranes were cast from formic acid solution at low pressure and room temperature. The relationship between gas permselectivity and chemical structure of polyalkylenebenzimidazole was discussed.It was found that the permeability order of hydrogen;carbon dioxide;oxygen;nitrogen;and methane is fit for ordinary glass polymers.The polymers that have longer flexible polymeric chain have higher gas permeability,but lower selectivity than the polymer that have shorter flexible chain.Gas permeability will increase if a flexible group is introduced into rigid chain.Gas permeability rises and selectivity reduces if temperature of transport gas increases.It reveals that the gas permeability will rise,if flexible segment is introduced in to rigid backbone for some aromatic polymers.
出处
《高分子学报》
SCIE
EI
CAS
CSCD
北大核心
1995年第3期278-283,共6页
Acta Polymerica Sinica
关键词
聚苯并咪唑
气体分离膜
气体透过系数
Polyalkylenebenzimidazole,Solution polycondensation, Gas permselective membrane,Gas permeation coefficient
Gas separation coefficient
