SEBS-g-MAH对PPO/PA66复合材料性能和形貌的影响  

Effect of SEBS-g-MAH on properties and morphology of PPO/PA66 blends

作　　者：杨青林 周松[1] 李璨然 余闻达 罗玉梅[1] YANG Qinglin;ZHOU Song;LI Canran;YU Wenda;LUO Yumei(School of New Energy and Materials,Southwest Petroleum University,Chengdu 610500,China)

机构地区：[1]西南石油大学新能源与材料学院,成都610500

出　　处：《中国塑料》2025年第3期30-35,共6页China Plastics

摘　　要：采用马来酸酐接枝苯乙烯-乙烯-丁烯-苯乙烯共聚物(SEBS-g-MAH)改性,用双螺杆挤出和注射成型制备了增韧的聚苯醚/聚酰胺66(PPO/PA66)复合材料,测试了材料吸水率、力学和熔体流动性能,用差示扫描量热法研究了结晶行为,用扫描电子显微镜观察了断面形貌。结果表明,由于PPO和PA66之间弱的界面黏附,添加PPO使PA66的韧性和拉伸强度明显降低;源于SEBS-g-MAH所产生的能量耗散以及PPO和PA66之间相容性改善,PPO/PA66(30/70)中添加10份SEBS-g-MAH,使拉伸强度、断裂伸长率和冲击强度分别提高23.95%、81.58%和157.39%;当SEBS-g-MAH含量为10份时,PPO/PA66(30/70)的综合力学性能较高;当SEBS-g-MAH含量为18份时,复合材料获得较高韧性;与纯PA66的吸水率(1.36%)比较,含10份SEBS-g-MAH的PPO/PA66(30/70)的吸水率(0.60%)降低了55.88%;PPO能促进PPO/PA66中PA66的结晶;添加SEBS-g-MAH会抑制PPO/PA66(30/70)中PA66的结晶。PPO和SEBS-g-MAH可改善PA66的熔体加工性能。Toughened polyphenylene ether/polyamide 66(PPO/PA66) blends were prepared through twin-screw extrusion and injection molding using maleic anhydride-grafted styrene-ethylene-butene-styrene copolymer(SEBS-g-MAH) as an impact modifier.Their water absorption,mechanical properties,melt flow performance were investigated and their crystallization behavior and fractured morphology were studied by differential scanning calorimetry and scanning electron microscopy.The results indicated the toughness and tensile strength of PPO/PA66 blends decreased significantly in the presence of PPO due to poor interfacial adhesion between PA66 and PPO.Owing to the energy absorption caused by SEBS-g-MAH as well as an improvement in the compatibility between PA66 and PPO,the addition of 10 phr SEBS-gMAH into the PPO/PA66(30/70) blend resulted in an increase in the tensile strength,elongation at break and impact strength by 23.95 %、81.58 % and 157.39 %,respectively.The PPO/PA66(30/70) blend obtained better comprehensive properties with the addition of 10phr SEBS-g-MAH,and it achieved relative maximum toughness at the SEBS-gMAH loading of 18phr.The PPO/PA66(30/70) containing 10phr SEBS-g-MAH present a water absorption of 0.61 %.This result decreased by 55.88 % Compared to the water absorption(1.36 %) of pure PA66.PPO enhanced the crystal formation of PA66 in the bends,whereas SEBS-g-MAH inhibited its crystal formation of PA66.Both PPO and SEBS-g-MAH improved the melt processability of PA66.

关 键 词：聚苯醚 聚酰胺66 马来酸酐接枝苯乙烯-乙烯-丁烯-苯乙烯共聚物 力学性能 吸水率 结晶性能 

分 类 号：TQ323.6[化学工程—合成树脂塑料工业]