扩链剂对聚四氢呋喃环氧乙烷共聚醚聚三唑弹性体力学特性和网络结构的影响  

Effects of Chain Extenders on Mechanics and Network of Polyethylene Oxide-Tetrahydrofuran Copolyether Polytriazole Elastomer

作　　者：胡京汇 邹业成[1,2] 何吉宇 杨荣杰[1,3] HU Jinghui;ZOU Yecheng;HE Jiyu;YANG Rongjie(School of Material Science and Engineering,Beijing Institute of Technology,Beijing 100081,China;Shandong Dongyue Federation,Zibo,Shandong 256400,China;Key Laboratory for Ministry of Education of High Energy Density Material,Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]北京理工大学材料学院,北京100081 [2]山东东岳集团,山东淄博256400 [3]北京理工大学高能量密度材料教育部重点实验室,北京100081

出　　处：《北京理工大学学报》2022年第3期324-330,共7页Transactions of Beijing Institute of Technology

基　　金：国防基金资助项目(204-J-2018-0452);装备预研基金资助项目(61407200114)。

摘　　要：选用端叠氮基聚四氢呋喃环氧乙烷共聚醚(AzTPET)或端叠氮基二甘醇(KL-1)作为扩链剂与端炔基聚四氢呋喃环氧乙烷共聚醚反应制备聚四氢呋喃环氧乙烷共聚醚聚三唑弹性体(PTPET).反应体系黏度稳定下,分析扩链剂对PTPET弹性体的力学性能和交联网络的影响.力学结果表明:在20℃时,未扩链的PTPET延伸率为112%,经40%(叠氮官能团比,下同)的AzTPET扩链后可提高到300%;在60℃时,延伸率由70.1%扩链后可达153%.经50%的KL-1扩链后样品在20℃时延伸率为200%,60℃下为120%.两种扩链剂制备样品的延伸率均大幅提高,但前者强度有所降低.在−40℃下,两扩链剂制备弹性体的拉伸强度均随扩链剂用量的增加而升高.KL-1扩链的PTPET弹性体表观密度高于AzTPET.综合分析,两种扩链剂均能显著提高PTPET的断裂延伸率,但扩链剂KL-1在PTPET中的力学强度优于AzTPET.In order to significantly increase the molecular weight of the prepolymer by using a chain extender,in this paper,taking azide-terminated polyethylene oxide-tetrahydrofuran copolyether(AzTPET)and azido-terminated diethylene glycol(KL-1)as chain extenders seperatly respectively,a reaction with ATPET was arranged to prepare a polyethylene oxide-tetrahydrofuran copolyether polytriazole(PTPET)elastomer.Under the condition of maintaining the viscosity of the reaction system,some tests were carried out to analyze the influence of two chain extenders on mechanical and cross-linking network properties of the PTPET elastomer.The results show that the elongation of the PTPET elastomer synthesized by AzTPET can increase from 112%(no AzTPET)to 300%(add 40%AzTPET)at 20℃,while at 60℃,the elongation can increase from 70.1%(no AzTPET)to 153%(add 40%AzTPET).Correspondingly,the elongation of PTPET can increase from 112%(no KL-1)to 200%(add 50%KL-1)at 20℃,while at 60℃,the elongation can increase from 70.1%without KL-1 to 120%(add 50%KL-1),which can increase the elongation at break while maintaining stable tensile strength.It is obvious that the elongation at break of PTPET with both chain extenders can be greatly improved,while the tensile strength decreases with the first one.The tensile strength of the above PTPET samples can be increased with the increase of the amount of chain extender at−40℃.Both types of chain extenders can significantly increase the elongation at break of PTPET,but KL-1 in PTPET is better than AzTPET from the perspective of mechanical strength effect.

关 键 词：扩链剂 溶胀 力学测试 聚四氢呋喃环氧乙烷共聚醚聚三唑弹性体 

分 类 号：O175[理学—数学]