不同增韧剂对玻纤增强液晶聚酯体系性能的影响

Effect of Different Toughening Agent on Glass Fiber Reinforced LCP System's Performance

以液晶聚酯(LCP)为基体树脂,研究玻璃纤维(GF)添加比例对LCP力学性能的影响,确定LCP/GF=70/30的比例为增强效果最优一组。在LCP/GF(70/30)体系中分别加入弹性体增韧剂马来酸酐接枝三元乙丙橡胶(EPDM–g–MAH)、马来酸酐接枝乙烯–辛烯共聚物(POE–g–MAH)、马来酸酐接枝加氢苯乙烯–丁二烯–苯乙烯共聚物(SEBS–g–MAH)、韧性好模量低的增韧树脂茂金属聚乙烯(m PE)及刚性粒子Ca CO3,探索不同增韧剂体系对LCP/GF体系力学性能的影响。研究结果表明,弹性体类增韧剂对LCP/GF体系力学性能的提升效果较为显著,其次为m PE,而适当使用刚性粒子Ca CO3可起到对体系既增强又增韧的作用。当LCP/GF基体为100份,增韧剂EPDM–g–MAH添加量为15份时,其增韧效果最优,冲击性能可提升24%。

The effect of glass fiber (GF) proportion on mechanical properties of liquid crystal polyester (LCP)/GF was studied by using LCP as matrix resin,LCP/GF =70/30 ratio of a set of optimal reinforcing effect was determined. In the LCP/GF (70/30) systems,elastomeric toughener such as maleic anhydride grafted ethylene propylene diene monomer (EPDM–g–MAH),maleic anhydride grafted ethylene–octene copolymer (POE–g–MAH),maleic anhydride grafted hydrogenated styrene–butadiene–styrene copolymer (SEBS–g–MAH),good toughness,low modulus toughening agent resin metallocene polyethylene (mPE) and rigid particles CaCO3 were added to. The effects of different toughening systems on mechanical properties of LCP/GF system were explored. The results show that the elastomer toughening effect is more significant for enhancing mechanical properties of LCP/GF system, followed mPE,and appropriate use of rigid particles CaCO3 may also play a role in the system to both strengthening and toughening. When LCP/GF matrix is 100 phr,toughening agent EPDM–g–MAH added in an amount of 15 phr,its toughening effect is optimal, impact performance of LCP/GF can be improved by 24%.