POE接枝GMA的制备及其增韧PA6的应用研究

熔融法制备聚烯烃热塑性弹性体(POE)接枝甲基丙烯酸缩水甘油酯(GMA),对其产物进行红外表征,证实了GMA已成功接枝到POE大分子链上。将接枝物用于聚酰胺-6(PA6)增韧改性,通过力学性能测试和SEM研究了弹性体含量及种类对共混物冲击强度和断面形态的影响。结果表明,POE与其接枝物共混作为弹性体增韧效果更好,当PA6、POE和POE-g-(GMA-co-St)质量比为80:6:14时,弹性体分散均匀且粒径细化为0.5~2μm,共混物缺口冲击强度提升至纯PA6的3倍。

Preparation of POE-g-GMA and Its Application Study on Toughening PA6

Polyolefin thermoplastic elastomer（POE, ethylene-1-octene copolymer）-g-glycidyl methacrylate（GMA） was prepared by melting method, and the product was characterized by FT-IR. The result shows that GMA has been grafted onto POE macromolecule chain successfully. Then the graft polymer was used to toughen polyamide 6（PA6）, and the influence of elastomer content and species on the impact strength and fracture surface morphology of the blends was investigated by mechanical property test and SEM. The results show that the toughening effect is better when POE is blended with its graft polymer as elastomer. When the mass ratio of PA6, POE and POE-g-（GMA-co-St） is 80：6：14, the elastomer disperses uniformly and its particle size becomes thinner to 0.5~2μm, the notched impact strength of the blends increases three times as against that of pure PA6.