Preparation and properties of flexible extruded nylon materials
In order to investigate the effects of plasticizer N-n-butyl benzene sulfonamide content and the types of nylon resin on the properties of long carbon chain nylon materials,the method of melt blending extrusion modification was adopted for prepar-ing nylon 612(PA612)materials with different plasticizer contents with using PA612 resin as substrate.Then,four flexible extruded nylon materials were prepared with using nylon 610(PA610),PA612,nylon 1012(PA1012)and nylon 12(PA12)resins as substrates,with a plasticizer content of 12.5 wt%.The thermal and mechanical properties of PA612 materials,as well as the perfor-mances of the four flexible extruded nylon materials before and after high-temperature hydrolysis aging were tested.The results show that with the increase of plasticizer content,the tensile strength at yield,flexural strength,flexural modulus,surface hardness,and melting temperature of PA612 material all decrease,while the melt flow rate,elongation at break,and room temperature notched impact strength increase,the low-temperature notched impact strength remains basically unchanged.After high-temperature hydroly-sis aging with antifreeze fluid,the tensile strength at break,elongation at break,notched impact strength and mass of the four flexi-ble extruded nylon materials show a reducing trend,while the flexural strength and modulus show an increasing trend as a whole.The high-temperature hydrolysis resistance of PA1012 and PA12 materials are better than that of PA610 and PA612 materials.
long carbon chain nylonautomotive pipingflexibilityextrudedplasticizerhydrolysis resistance
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