摘要
以玻纤增强环氧乙烯基酯树脂(EVE/GF)和玻纤增强不饱和聚酯树脂(UP/GF)两种复合材料为研究对象,在热氧老化作用下(120℃高温)进行老化前后两种试件物理性能和静态力学性能的测试分析,同时采用傅里叶红外光谱、扫描电镜对试件基体结构及断口形貌进行分析,最后用ANSYS软件对试件静态力学行为进行模拟分析。结果表明:高温老化672 h后,EVE/GF质量降低0.5%,UP/GF质量降低0.26%,UP/GF质量保持率较好;EVE/GF硬度降低4.8%,UP/GF硬度降低6.3%,EVE/GF硬度保持率较好;EVE/GF拉伸性能降低了6.14%,UP/GF拉伸性能降低了10.94%,EVE/GF试件耐高温性能好;通过红外光谱分析可知,EVE/GF和UP/GF两种试件在高温与氧气作用下,发生热氧老化效应,生成了更多的羧酸与羧基;SEM下,树脂发生降解,基体严重开裂,纤维与树脂界面发生脱黏。
In this paper,two kinds of glass fiber reinforced epoxy vinyl ester resin(EVE/GF)and glass fiber reinforced unsaturated polyester resin(UP/GF)composites were studied.The physical properties and static mechanical properties of the two samples were tested and analyzed before and after aging under the action of thermal oxygen aging(high temperature at 120℃),and the matrix structure and fracture morphology of the samples were analyzed by Fourier transform infrared spectroscopy and scanning electron microscopy.Finally,the static mechanical behavior of the specimen is simulated and analyzed by ANSYS software.The results showed that after high temperature aging for 672 h,the quality of eve/gf decreased by 0.5%,the quality of UP/GF decreased by 0.26%,and the quality retention rate of UP/GF was better.EVE/GF hardness decreased by 4.8%,UP/GF hardness decreased by 6.3%,and eve/gf hardness retention rate was good.The tensile properties of eve/gf and up/gf were reduced by 6.14%and 10.94%respectively,and the high temperature resistance of eve/gf specimens was good.Through infrared spectrum analysis,we can see that EVE/GF and UP/GF have a thermal oxygen aging effect under the action of high temperature and oxygen,and produce more carboxylic acids and carboxyl groups.Under SEM,the resin degraded,the matrix cracked seriously,and the interface between fiber and resin was debonded.
作者
王晓宁
薛莲
党元晓
WANG Xiaoning;XUE Lian;DANG Yuanxiao(Changji University,Xinjiang Changji 831100,China)
出处
《辽宁化工》
2025年第9期1602-1604,共3页
Liaoning Chemical Industry
关键词
热氧老化
物理性能
力学性能
降解
Thermal oxygen aging
Physical properties
Mechanical properties
Degrdation
