聚双酚A二炔丙基醚的制备及其气体分离性能

Preparation of Poly(Bisphenol A Dipropargyl Ether)and Its Gas Separation Performance

采用氧化偶合的方法制备了聚双酚A二炔丙基醚(PAPE),采用1H NMR和13 C NMR表征了PAPE的结构,探究了反应物浓度、氧气流量和反应时间对产物分子量的影响,采用DSC和TGA表征了PAPE的热性能。通过溶液浇铸法得到PAPE膜,研究了膜的力学性能和气体分离性能。研究结果表明,PAPE的数均分子量随双酚A二炔丙基醚(BADPE)的浓度和反应时间的增加而增加,在甲苯、THF和DMF等溶剂中具有优良的溶解性;N 2中5%热失重温度(T d5)为355℃;PAPE的分子量越大,其膜的拉伸性能和气体分离性能越好,PAPE的拉伸强度可达12.2MPa,断裂伸长率为96.8%;在160℃固化8min,膜的拉伸强度增长了500%左右,达76.2MPa;PAPE膜对CO 2的亲和性最好,膜的CO 2渗透系数P(CO 2)为2.1barrer,分离系数α(CO 2/N 2)为14.9。

Bisphenol A dipropargyl ether(BADPE)was used to prepare poly(bisphenol A dipropargyl ether)(PAPE)utilizing the oxidative coupling approach.The structure of PAPE was characterized by proton nuclear magnetic resonance(1H NMR)and carbon-13 nuclear magnetic resonance(13 C NMR).The effects of BADPE concentration,oxygen flow rate and reaction time on the number-average molecular weight of the PAPE were investigated.The thermal performance of PAPE was also characterized.The PAPE membranes which have flexible chain of ether bonds and hard chain of phenyl groups were prepared by casting.The results show that the number-average molecular weight of PAPE increases with increase of BADPE concentration and reaction time,and the effect of oxygen flow rate on the molecular weight of PAPE is little.The PAPE could be dissolved in toluene,tetrafuran(THF),dimethylformamide(DMF)and so on.The temperature at 5%mass loss in N 2 of PAPE can reach 355℃.The larger molecular weight of PAPE has higher tensile strength and better gas separation properties.The tensile strength of PAPE can reach 12.2MPa,and the elongation at break of PAPE was 96.8%.After cured at 160℃for 8 min,the tensile strength of PAPE increases by 500%to 76.2MPa.The CO 2 affinity of PAPE is obviously superior to other gases.The CO 2 permeability coefficient of PAPE was 2.1 barrer,and CO 2/N 2 selectivity of PAPE was 14.9.