SEBS基尼龙包覆料的研究

Study on SEBS-based coating material for nylon

以SEBS(氢化苯乙烯-丁二烯-苯乙烯嵌段共聚物)和SEBS-g-MAH(马来酸酐接枝SEBS)为基体树脂、白油为增塑剂、滑石粉为填料和环氧树脂(EP)为改性剂,利用双螺杆挤出机共混挤出包覆料;然后以玻璃纤维增强尼龙6为被包覆料,采用二次注塑法将包覆料包覆在尼龙板上。通过单因素试验法优选出制备包覆料的较佳工艺条件。结果表明:当w(SEBS)=100%、w(SEBS-g-MAH)=30%、w(白油)=100%和w(滑石粉)=100%时,包覆料具有粘接力强、硬度适中、流动性较好和价格适宜等特点,并且EP的引入使包覆料的粘接机制发生了变化。

With SEBS （hydrogenated styrene-butadiene-styrene block copolymer） and SEBS-g-MAH （SEBS grafted by maleic anhydride ） as matrix resin, white oil as plasticizer, talc as filler and epoxy resin （EP） as modifier, a coating material was prepared by coextrusion of twin-screw extruder. Then with nylon 6 reinforced by glass fiber as coated material, a nylon board coated by the coating material was prepared by secondary injection method. The better process conditions of preparing coating materials were preferred by single factor experiment. The results showed that the coating material has the following characteristics such as strong bonding power, moderate hardness, better fluidity and seemly price, and the bonding mechanism of coating material was changed after adding EP when the mass fractions of SEBS, SEBS-g-MAH, white oil and talc were 100%, 30%, 100% and 100% respectively.