不同截面类型玻纤增强PA6的性能  

Performance of PA6 reinforced with glass fibers of different cross-sectional types

作　　者：孟凡地[1] 吴承然[1] 易琪伟 王彩 孙照亮[1] 邓娇[1] MENG Fandi;WU Chengran;YI Qiwei;WANG Cai;SUN Zhaoliang;DENG Jiao(Zhuzhou Times New Material Technology Co.,Ltd.,Zhuzhou 412007,China)

机构地区：[1]株洲时代新材料科技股份有限公司,湖南株洲412007

出　　处：《工程塑料应用》2024年第7期43-48,共6页Engineering Plastics Application

摘　　要：对比研究了扁平玻纤及圆形玻纤增强尼龙6 (PA6)复合材料的力学性能、流动性能、收缩翘曲情况、摩擦性能及线膨胀系数(CLTE)。结果表明,随着玻纤含量增加,扁平玻纤及圆形玻纤增强PA6复合材料力学性能均增加,但熔体流动速率(MFR)降低;相同玻纤含量下,与圆形玻纤相比,扁平玻纤增强PA6复合材料的拉伸强度、弯曲强度及弯曲弹性模量较低,简支梁缺口冲击强度及MFR较高。在玻纤含量30%的条件下,不同扁平玻纤及圆形玻纤增强PA6复合材料性能存在差异,通过收缩率测试分析,扁平玻纤复合材料比圆形玻纤具有更低的收缩率及横纵收缩比,扁平比越高,横纵收缩比越低,翘曲度越小;通过MFR及注塑螺旋线测试,发现扁平玻纤复合材料具有更好流动性、更高流长比,扁平比越高优势越明显,有利于成型加工;通过滑动摩擦测试结果看出,扁平玻纤复合材料具有更低摩擦系数,随着扁平比增大,摩擦系数越低;通过热机械分析检测,扁平玻纤复合材料在垂直流动方向CLTE低于圆形玻纤,且流动方向和垂直流动方向CLTE差异也较小。扁平玻纤增强材料能改善传统圆形玻纤增强体系的一些不足,优化产品性能。The mechanical properties,flow performance,shrinkage and warping,friction performance and linear expansion coefficient(CLTE)of flat glass fiber and circular glass fiber reinforced nylon 6(PA6)composite materials were compared and studied.The results show that as the glass fiber content increases,the mechanical properties of flat glass fiber and circular glass fiber reinforced PA6 composites increase,but the melt melt flow rate(MFR)decreases.At the same glass fiber content,compared with circular glass fiber,flat glass fiber reinforced PA6 composites have lower tensile strength,flexible strength and flexible modulus,while the notched impact strength and MFR of simply supported beams are higher.At the condition of 30%glass fiber content,there are differences in the performance of different flat ratio glass fibers and circular glass fiber reinforced composite materials.Through shrinkage rate testing analysis,flat glass fiber composite materials have lower shrinkage rates and transverse and longitudinal shrinkage ratios compared to circular glass fibers.The higher the flat ratio,the lower the transverse and longitudinal shrinkage ratio,and the smaller the warpage.Through MFR testing and injection molding spiral line testing,flat glass fiber composite materials have better fluidity,higher flow length ratio,and the higher the flat ratio,the more obvious the advantage,which is conducive to molding processing.Through the sliding friction test results,it can be seen that the flat glass fiber composite material has a lower friction coefficient.As the flatness ratio increases,the friction coefficient decreases;Through thermal mechanical analysis,it is found that the CLTE of flat glass fiber composite materials in the vertical flow direction is lower than that of circular glass fibers,and the difference in CLTE between the flow direction and the vertical flow direction is also small.Flat glass fiber reinforcement materials can solve some inherent problems of traditional circular glass fiber reinforcement systems and improve p

关 键 词：尼龙6 扁平玻纤 收缩率 流长比 线膨胀系数 

分 类 号：TQ322.3[化学工程—合成树脂塑料工业]