Modification and Properties of Continuous Glass Fibre Reinforced Nylon 6 Composites Prepared by In Situ Polymerisation
Nylon 6(PA6)resin has excellent properties and its continuous fibre composites have a wide range of applications in automotive and aerospace sectors.However,the high viscosity of PA6 resin after melting does not easily impregnate continuous fibres sufficiently,and the poor interfacial adhesion of continuous fibres and PA6 composites limits performance and applications of the composites.Aimed at these problems,continuous glass fibre reinforced nylon 6(CGF/PA6)composites were investigated.Firstly,anionic ring-opening polymerisation was applied to prepare PA6,and the optimum preparation process was determined;secondly,continuous glass fiber(CGF)was modified with silane coupling agent KH550(AP)and characterized by infrared spectroscopy;finally,CGF/PA6 composites were prepared by in situ polymerisation,and the effect of AP modification on the mechanical properties of CGF/PA6 composites was investigated.The tensile fractures of CGF/PA6 composites were characterized by SEM.The results show that AP was bonded to the surface of CGF and the AP modification could enhance the interfacial adhesion of CGF/PA6 composites,thus improving the tensile strength of CGF/PA6 composites.When the AP dosage is 2%,the tensile strength of CGF/PA6 composite is as high as 88.52 MPa,the elongation at break of the composite reaches the lowest level of 4.90%.The impact strength of the CGF/PA6 composites does not change much,all around 50 kJ/m2,indicating that the toughness of the composites is less affected by CGF surface modification.
in situ polymerizationglass fibernylon 6silane coupling agent KH550mechanical property
NETL
NSTL
万方数据
