聚氨酯改性环氧树脂的增韧性能探究  

Toughening Investigation of Polyurethane Modified Epoxy Resin

作　　者：娄星原 冯朝波 黎灿光 陈建军 唐华 Lou Xingyuan;Feng Chaobo;Li Canguang;Chen Jianjun;Tang Hua(Research&Development Department,Guangzhou Baiyun Chemical Industry Co.,Ltd.,Guangzhou 510700,China)

机构地区：[1]广州市白云化工实业有限公司科技发展部,广东广州510700

出　　处：《广东化工》2021年第21期46-48,共3页Guangdong Chemical Industry

摘　　要：环氧树脂粘合剂具有强度高、硬度高以及粘接性优异的特点,广泛应用于电子电器、交通运输以及航空航天领域。但环氧树脂固化物脆性大,韧性较低的特性使得其无法完全满足工程\机械的性能要求。因此,环氧树脂粘合剂的增韧过程成为了研究热点。本文通过双酚A型环氧树脂与聚氨酯预聚体的反应,将柔性链段接枝到环氧树脂上,最终形成了具有软硬链段互穿网络结构的固化物。通过红外谱图、冲击韧性测试、单搭接拉伸剪切强度测试以及扫描电子显微镜进行了表征,结果显示,改性环氧树脂固化物可达粘接强度24 MPa、冲击强度22 kj/m^(2)。As epoxy adhesive represents high modulus,high hardness,and excellent bonding strength,it is widely used in electric components,transportation,and aerospace fields.Also,with the high brittleness,epoxy adhesives are performed poor engineering/mechanical properties.Toughness improvement is consequently the critical research program that being investigated.This article reveals a synthesized polyurethane modified epoxy resin which contains soft segments from pre-polymerized polyurethane and rigid segments from epoxy resin,and finally cured with amine to form soft-rigid IPN(interpenetrating network).Data of FT-IR spectrum,impact toughness test,lap-shear strength,and SEM(scanning electron microscope)are used to demonstrate the result of modified epoxy adhesive which achieved 24 MPa of shear strength and 22 kj/m^(2) of impact toughness.

关 键 词：聚氨酯预聚体 改性环氧树脂 增韧 拉伸剪切 冲击韧性 

分 类 号：TQ[化学工程]