Multiblock poly(ether-b-amide)copolymers comprised of PA1212 and PPO-PEO-PPO with specific moisture-responsive and antistatic properties  

作　　者：Jie Jiang Wei Cheng Qiuyu Tang Xun Pan Jinjin Li Ling Zhao Zhenhao Xi Weikang Yuan 

机构地区：[1]State Key Laboratory of Chemical Engineering,School of Chemical Engineering,East China,University of Science and Technology,Shanghai 200237,China [2]Shanghai Key Laboratory of Multiphase Materials Chemical Engineering,East China University of Science and Technology,Shanghai 200237,China [3]Flinders Institute for Nanoscale Science and Technology,Flinders University,SA 5042,Australia [4]College of Chemistry and Chemical Engineering,Xinjiang University,Urumqi 830046,China

出　　处：《Chinese Journal of Chemical Engineering》2023年第1期421-430,共10页中国化学工程学报（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (21978089 and 21878256);the Fundamental Research Funds for the Central Universities (22221818010);the 111 Project (B20031);the Program of Shanghai Subject Chief Scientist (21XD1433000)

摘　　要：Functional multiblock poly(ether-b-amide)(PEBA)copolymers,comprised of PA1212(polyamide 1212)as hard segments and Jeffamine ED-2003 as soft segments,were successfully prepared via two-step melt polycondensation without any amidation catalyst.Here,using diamino-terminated poly(propylene oxide)-poly(ethylene oxide)-poly(propylene oxide)(PPO-PEO-PPO),Jeffamine ED-2003,enhances the compatibility between polyamide oligomer and polyether,which is better than the traditional route using hydroxyl-terminated polyether.The chemical structure of multiblock PEBAs,as well as the microphase separated structure with crystalline phase of polyamide and polyether,were confirmed by heteronuclear multiple-bond correlation spectrum,heteronuclear multiple quantum correlation spectrum,Fourier transform infrared spectroscopy(FT-IR),differential scanning calorimetry and dynamic mechanical analysis.The hydrophilic PEBA copolymers showed water adsorption ranging from 87.3%to 17.1%depending on the polyether content,and specially showed moisture responsive behavior within seconds when exposed to moisture.The corresponding mechanism was studied using time-resolved attenuated total reflectance FT-IR spectroscopy in the molecular level and the water diffusion coefficient was estimated to be 1.07×10^(–8)cm^(2)∙s^(-1).Two-dimensional correlation FT-IR spectra analysis was performed to confirm that the interaction between water and polyether phase was in preference to that between water and polyamide matrix,and water molecule only forms hydrogen bond with the polyether segment.Due to the incorporation of PEO segments,the PEBAs have the surface resistivity varying from 5.6×10^(9)to 6.5×10^(10)Ω,which makes PEBA potential candidate as permanent antistatic agent.

关 键 词：Poly(ether-b-amide)s Moisture-responsive Antistatic In situ FT-IR 2D FT-IR analysis 

分 类 号：TQ334[化学工程—橡胶工业]