摘要
通过研究两种玻璃纤维(GF)增强尼龙(PA)[GF增强PA66(A3WG6,巴斯夫),简称复合材料A;自制PA66+30%GF,简称复合材料B]在环境温湿度条件下调节不同时间后的吸湿状态,探讨了不同时间调节后PA复合材料的拉伸强度、拉伸弹性模量、拉伸应变、冲击强度及收缩率与调节时间的关系,考察了材料在常温环境下调节时间与材料含水率的关系,同时分析了水分对PA复合材料性能影响的机理。结果表明,在试验范围内,PA复合材料在常温环境中的吸湿率随着调节时间的延长而增加,环境吸湿速率在16 h达到最高,在168 h后趋于平稳。吸湿后的PA复合材料拉伸强度随着调节时间的延长逐渐下降,拉伸应变和拉伸弹性模量变化相对较小,冲击强度则随着调节时间的延长逐渐增大。当PA66复合材料A、B在环境温湿度条件下调节168 h后,材料的含水率分别为0.207%和0.145%,材料的拉伸强度分别下降了14 MPa和15.3 MPa,损失率达到6.9%和7.8%。当PA66复合材料A、B在环境温湿度条件下调节960 h后,材料的含水率分别为0.578%和0.439%,材料的拉伸强度分别下降了38 MPa和35 MPa,损失率分别达到18.6%和18.2%,材料的冲击强度则提高了12.3%和45.7%。PA66复合材料A、B在相同环境温湿度条件下调节不同时间后的物理力学性能、吸湿状态呈相同趋势。
By studying the hygroscopic states of two kinds of glass fiber(GF)reinforced nylon(PA)[GF reinforced PA66(A3WG6,BASF),referred to as composite A,self-made PA66+30%GF,referred to as composite B]after adjustment of different time under ambient temperature and humidity conditions,the relationship between the tensile strength,tensile modulus,tensile strain,impact strength and shrinkage rate of PA composites after adjustment of different time and adjustment time was discussed.The relationship between the adjusting time and the moisture content of the material at room temperature was investigated,and the mechanism of the influence of moisture on the properties of the PA composites was analyzed.The results show that in the experimental range,the moisture absorption rate of PA composites in normal temperature environment increases with the extension of regulation time.The environmental moisture absorption rate reaches the highest at 16 h,and tends to be stable after 168 h.The tensile strength of PA composites decrease gradually with the extension of adjusting time,the tensile strain and tensile modulus change relatively little,and the impact strength increase gradually with the extension of adjusting time.When PA 66 composites A and B are adjusted under ambient temperature and humidity conditions for 168 h,the water content of the composites is 0.207%and 0.145%respectively.The tensile strength of PA composites decrease by 14 MPa and 15.3 MPa respectively,and the loss rate reach 6.9%and 7.8%.When PA composites A and B are adjusted for 960 h under ambient temperature and humidity conditions,the water content of the composites is 0.578%and 0.439%,respectively.The tensile strength of the composites decrease by 38 MPa and 35 MPa,the loss rate reach 18.6%and 18.2%,respectively,and the impact strength of the composites increase by 12.3%and 45.7%.The physical and mechanical properties,hygroscopic state of PA 66 composite A and B show the same trend after adjusting for different time under the same ambient temperature and humidity conditions.
作者
龚梦晴
武金龙
GONG Mengqing;WU Jinlong(Anhui Zhonghan Polymer Technology Co.,LTD.,Xuancheng 242300,China;College of Materials Science and Engineering,North Minzu University,Yinchuan 750021,China)
出处
《工程塑料应用》
CAS
CSCD
北大核心
2024年第5期140-145,共6页
Engineering Plastics Application
关键词
玻璃纤维增强尼龙复合材料
吸湿
含水率
性能
调节时间
glass fiber reinforced nylon composite
hygroscopic
moisture content
performance
adjust time
