摘要
在加入增容剂马来酸酐接枝聚苯醚(PPE-g-MAH)的基础上,添加不同用量的增韧剂马来酸酐接枝乙烯-辛烯共聚物(POE-g-MAH)、马来酸酐接枝氢化苯乙烯-丁二烯-苯乙烯嵌段共聚物(SEBS-g-MAH),采用双螺杆熔融挤出法制备尼龙6/聚苯醚(PA6/PPE)合金。通过常规力学性能测试探究POE-g-MAH,SEBS-g-MAH对PA6/PPE合金力学性能的影响,并通过扫描电子显微镜、差示扫描量热(DSC)仪分析PA6/PPE合金的增韧机理及结构形貌。结果表明,添加5份POE-g-MAH时,PA6/PPE合金的综合力学性能最佳,悬臂梁缺口冲击强度为26.9 kJ/m^(2),拉伸强度为65 MPa,弯曲强度为83 MPa。添加3份SEBS-g-MAH时,合金的综合力学性能最佳,悬臂梁缺口冲击强度为30.7 kJ/m^(2),拉伸强度为65 MPa,弯曲强度为80 MPa。DSC测试表明,添加增韧剂POE-g-MAH,SEBS-g-MAH会使PA6/PPE合金的过冷度增大,结晶度下降。SEM分析表明,增韧剂POE-g-MAH,SEBS-g-MAH可进一步增加两相界面的粘结力,有效吸收分散所受冲击应力,大大提高合金的韧性。
On the basis of adding the compatibilizer maleic anhydride grafted polyphenylene ether(PPE-G-MAH),the different amount of toughening agent maleic anhydride graft ethylene-octene copolymer(POE-G-MAH)or maleic anhydride graft hydrogenated styrene-butadiene-styrene block copolymer(SEBS-g-MAH)was added,the nylon 6/polyphenylene ether(PA6/PPE)alloy was prepared by twin-screw melt extrusion method.The influences of POE-g-MAH and SEBS-g-MAH on the mechanical properties of PA6/PPE alloy was investigated by conventional mechanical properties test,and the toughening mechanism and structural morphology of PA6/PPE alloy were analyzed by scanning electron microscope and differential scanning calorimetry(DSC).The results show that the comprehensive mechanical properties of PA6/PPE alloy are the best when 5 phr POE-g-MAH is added.The Izod notch impact strength,tensile strength and bending strength of the alloy are 26.9 kJ/m^(2),65 MPa and 83 MPa respectively.When 3 phr SEBS-g-MAH is added,the comprehensive mechanical properties of the alloy is the best.The Izod notch impact strength of the alloy is 30.7 kJ/m^(2),the tensile strength is 65 MPa,and the bending strength is 80 MPa.DSC test shows that adding toughening agents POE-g-MAH or SEBS-G-MAH increases the undercooling degree of PA6/PPE alloy and decreases the crystallinity.SEM analysis shows that the toughening agents POE-g-MAH and SEBS-G-MAH can further increase the bonding force of the interface between the two phases,effectively absorb and disperse the impact stress,and greatly improve the toughness of the alloy.
作者
范煜炜
刘玉倩
吕通建
陈利猛
Fan Yuwei;Liu Yuqian;Lyu Tongjian;Chen Limeng(School of Chemistry,Liaoning University,Shenyang 110036,China;Shenyang Ketong Technology Plastic Co.,Ltd.,Shenyang 101142,China)
出处
《工程塑料应用》
CAS
CSCD
北大核心
2021年第12期50-54,共5页
Engineering Plastics Application
