摘要
以三羟基聚醚多元醇(PPG)、二苯基甲烷二异氰酸酯(MDI)作为软段和硬段,玻璃纤维(GF)为增强体,采用预聚体法制备自交联型GF/聚氨酯(PU)复合材料。借助旋转式黏度计、DMA、SEM、XRD和万能力学试验机等分析检测手段,研究了PU预聚体聚合温度、适用期、物相及GF含量等因素对GF/PU复合材料力学性能的影响。结果表明:PU预聚体聚合温度为50℃,GF含量为55wt%时,GF/PU复合材料综合性能最优,拉伸强度、弯曲强度和冲击韧性分别为794MPa、846MPa和228kJ/m2,动态力学性能损耗因子(tanδ)峰值为0.59。
The prepolymer method was used to prepare the glass fiber reinforced self-crosslinking polyurethane(GF/PU)composites,in which three functional polyether polyol(PPG)and two phenyl methane diisocyanate(MDI)acted as the soft and hard segments,respectively.The effects of the polymerization temperature of PU prepolymer,pot-life of application,crystallinity and content of GF on the dynamic mechanical and mechanical properties of the GF/PU composites were studied by using rotating viscometer,DMA,SEM,XRD and mechanical testing machine.The results show that the GF/PU composites exhibit the highest performance comprehensive performance when the polymerization temperature of the PU prepolymer is 50℃and the mass fraction of GF is 55 wt%.The tensile strength,flexural strength,and impact toughness of GF/PU composite are 794 MPa,846 MPa and 228 kJ/m^2,respectively.The peak value of dynamic mechanical properties loss factor(tanδ)is 0.59.
作者
刘小祥
刘翼
安珈璇
杨朝龙
夏小超
李又兵
LIU Xiaoxiang;LIU Yi;AN Jiaxuan;YANG Chaolong;XIA Xiaochao;LI Youbing(School of Material Scienee and Engineering,Chongqing University of Technology, Chongqing 400054 , China;Chongqing Municipal Key Laboratory of Institutions of Higher Education for Mould Technology, Chongqing 400054, China;Key Laboratory of Advanced Manufacturing Technology for Automobile Parts, Ministry of Education, Chongqing 400054. China)
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2019年第3期617-623,共7页
Acta Materiae Compositae Sinica
基金
国家国际科技合作专项项目(2015DFA51330)
重庆理工大学研究生创新基金(ycx2018102)
重庆理工大学材料学院研究生创新基金(2018CLCXCY1001)
关键词
聚氨酯
预聚体法
玻璃纤维
复合材料
力学性能
polyurethane
prepolymer method
glass fiber
composite
mechanical properties
