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在聚乳酸(PLA)中加入线形低密度聚乙烯(PE-LLD)进行增韧,并通过相容剂 PE-LLD-g-(GMA-co-St)增容PLA 和 PE-LLD。采用红外光谱、动态流变测试和扫描电子显微镜对共混物进行了表征,测试了共混物的冲击强度。结果表明,加入 PE-LLD-g-(GMA-co-St)能明显提高 PLA/PE-LLD 的冲击韧性,最高比 PLA/PE-LLD 简单共混物提高了144%,熔体的损耗模量G″明显增大,PE-LLD 分散相在 PLA 基体中有更加细微的分散,界面更加模糊,PE-LLD-g-(GMA-co-St)在共混体系中起到了反应性增容作用。
Linear low density polyethylene (PE-LLD) was added to polylactic acid (PLA) for toughening and PLA and PE-LLD were compatibilized by compatibilizer PE-LLD-g- (GMA-co-St). The blends were characterized by FTIR, dynamic rheological tests and scanning electron microscopy. The impact strength of blends was tested. The results show that the addition of PE-LLD-g- (GMA-co-St) can significantly improve the impact toughness of PLA / PE-LLD, up to 144% The amount of G "significantly increased, the dispersion of PE-LLD dispersed more subtly in the PLA matrix, and the interface was more vague. The PE-LLD-g- (GMA-co-St) effect.