杂萘联苯共聚醚砜和聚醚酰亚胺的耐氨性探究  

Exploration of Ammonia Resistance of Copoly(phthalazinone biphenyl ether sulfone)and Polyetherimide

作　　者：王旭昆 李战胜[1] 刘乾 王丹慧[1] 徐树刚[1] 张守海[1] 蹇锡高[1] WANG Xukun;LI Zhansheng;LIU Qian;WANG Danhui;XU Shugang;ZHANG Shouhai;JIAN Xigao(College of Chemical Engineering,Dalian University of Technology,Liaoning High Performance Resin Engineering Technology Research Center,Liaoning Key Laboratory of Polymer Science and Engineering,Dalian Key Laboratory of Membrane Materials and Process,Dalian 116024,China)

机构地区：[1]大连理工大学化工学院,辽宁省高性能树脂工程技术研究中心,辽宁省高分子科学与工程重点实验室,大连市膜材料与膜过程重点实验室,大连116024

出　　处：《塑料工业》2024年第7期150-154,共5页China Plastics Industry

基　　金：大连市高层次人才创新支持计划(2019RD08)。

摘　　要：为考察杂萘联苯共聚醚砜(PPBES)和聚醚酰亚胺(PEI)的耐氨性,采用傅里叶变换红外光谱仪、万能材料试验机和乌氏黏度计,探究了氨水溶液以及氨气对PPBES和PEI的化学结构、力学性能和特性黏度的影响。结果表明,PEI在氨水溶液和氨气中均发生了酰亚胺环的降解反应,经过氨水溶液浸泡后,PEI的力学性能和特性黏度都有大幅度降低,甚至均质膜发生破裂;在氨气中放置30 d后,PEI由固态均质膜降解为黏稠状液体,耐氨性较差。而PPBES在氨水溶液和氨气中的化学结构没有发生明显变化,经氨水溶液浸泡后,PPBES的断裂伸长率由15.8%减小为13.6%,拉伸强度由71.6 MPa减小为68.5 MPa,特性黏度由0.70 dL/g减小为0.55 dL/g,但下降幅度小于PEI;PPBES在氨气中放置30和60 d前后的特性黏度在0.70~0.73 dL/g之间,没有发生明显变化,拉伸强度由71.6 MPa减小为66.5 MPa,断裂伸长率从15.8%增大为20.3%,与PEI相比,PPBES具有更好的耐氨性。To investigate the ammonia resistance of copoly(phthalazinone biphenyl ether sulfone)(PPBES)and polyetherimide(PEI),the effects of ammonia solution and ammonia gas on the chemical structures,mechanical properties and intrinsic viscosities of PPBES and PEI were investigated by Fourier transform infrared spectrometer,universal material testing machine and Ubbelohde viscometer.The results show that the imide ring degradation of PEI occurs in ammonia solution and ammonia gas.After soaked in ammonia solution,the mechanical properties and intrinsic viscosity of PEI reduce,and the homogeneous membrane even breaks.After 30 d in ammonia gas,PEI degrades from a solid homogeneous membrane to a viscous liquid with poor ammonia resistance.However,the chemical structures of PPBES in ammonia solution and ammonia gas do not change significantly.After soaked in ammonia solution,the elongation at break of PPBES decreases from 15.8%to 13.6%,the tensile strength decreases from 71.6 MPa to 68.5 MPa,and the intrinsic viscosity decreases from 0.70 dL/g to 0.55 dL/g,but the decline is less than PEI.The intrinsic viscosities of PPBES before and after being placed in ammonia for 30 and 60 d are 0.70-0.73 dL/g,showing no significant change,and the tensile strength decreases from 71.6 MPa to 66.5 MPa,the elongation at break increases from 15.8%to 20.3%.Compared with PEI,PPBES has better ammonia resistance.

关 键 词：杂萘联苯共聚醚砜 聚醚酰亚胺 耐氨性 降解 

分 类 号：TQ326.6[化学工程—合成树脂塑料工业]