抗冲击型聚脲弹性体涂层的合成及性能表征  

Synthesis and Characterization of Impact Resistant Polyurea Elastomer Coatings

作　　者：卢春江 郭辉[1,2] 蒋林志 顾蒙 于安峰 凌晓东 LU Chunjiang;GUO Hui;JIANG Linzhi;GU Meng;YU Anfeng;LING Xiaodong(School of Civil Engineering and Architecture,Southwest University of Science and Technology,Mianyang 621010,Sichuan,China;Sichuan Key Laboratory of Shock and Vibration of Engineering Materials and Structures,Southwest University of Science and Technology,Mianyang 621010,Sichuan,China;Qingdao Safety Engineering Research Institute of China Petroleum&Chemical Corporation,Qingdao 266000,Shandong,China)

机构地区：[1]西南科技大学土木工程与建筑学院,四川绵阳621010 [2]西南科技大学工程材料与结构冲击振动四川省重点实验室,四川绵阳621010 [3]中国石油化工股份有限公司青岛安全工程研究院,山东青岛266000

出　　处：《西南科技大学学报》2021年第3期19-24,共6页Journal of Southwest University of Science and Technology

基　　金：四川省科技计划应用基础项目(2020YJ0420)。

摘　　要：聚脲作为一种高分子材料,在结构抗冲击、防爆领域得到了大量的研究与应用。采用半预聚物法合成NCO质量分数为15.0%~15.5%的聚脲弹性体涂层,分析了异氰酸酯指数对聚脲涂层材料综合性能的影响,并探讨了胺类扩链剂比例对其固化性能、附着力及拉伸性能的影响规律,同时测试了聚脲涂层材料在准静态、动态下的拉伸性能。结果表明:异氰酸酯指数为1.0,聚脲涂层材料显示出优异的综合性能;端氨基聚醚D-2000与T-5000质量比为9∶1,扩链剂E100与W6200质量比为1.6∶1时,聚脲涂层材料的固化速度较快,拉伸强度不低于20 MPa,断裂伸长率不低于480%,硬度为94 A。性能分析揭示了聚脲涂层材料受拉时的应力-应变行为非线性特征及应变率效应,对聚脲涂层材料的工程防护应用有一定指导意义。Polyurea,as a kind of polymer material,has been widely studied and applied in the field of structural impact resistance and explosion protection.In this paper,polyurea coating materials with NCO content at 15.0%~15.5%were synthesized by quasi-prepolymer method.The effects of the isocyanate index on the comprehensive properties of polyurea coating materials were analyzed,and the effects of the proportion of amine chain extender on the curing properties,adhesion and tensile properties were discussed.At the same time,the tensile properties under quasi-static and dynamic conditions were tested.The results show that the isocyanate index is 1.0,and the polyurea coating material shows excellent comprehensive properties.When the ratio of terminal amino polyether m D-2000/m T-5000 is 9∶1,and the ratio of chain extender m E100/m W6200 is 1.6∶1,the curing speed is faster,the tensile strength is not less than 20 MPa,the elongation at break is not less than 480%,and the hardness is 94 A.In addition,the nonlinear characteristics of stress-strain behavior and strain rate effect of polyurea coating materials are revealed by performance analysis,which has certain guiding significance for engineering protection application of polyurea coating materials.

关 键 词：聚脲弹性体 胺类扩链剂 异氰酸酯指数 力学性能 应变率效应 

分 类 号：TQ630[化学工程—精细化工]