中文摘要：

通过自制丙烯酸酯类核壳结构弹性体（ACR）对PLA进行增韧,来提高其冲击性能。在ACR制备过程中,先采用种子乳液聚合法制备了一系列不同粒径的PBA核层乳液,再进一步聚合得到壳层PMMA。将ACR与PLA共混,对共混物进行了一系列测试,结果表明：ACR的加入显著提高了PLA的冲击性能,并在8～15%以后达到最大,其增韧效果可达10～12倍,同时其拉伸性能并没有受到明显影响。进一步探讨了ACR的粒径、核壳比、用量等因素对增韧效果的影响。

英文摘要：

Acrylic core-shell elastomer （ACR） was prepared and chosen to toughen PLA via latter blending. The preparation started with the synthesis of a series of poly （butyl acrylate） （PBA） core emulsion with different particle size by seed emulsion polymerization. Poly （methyl methacrylate） （PMMA） shell emulsion was then obtained by the next step of polymerization. A serious of tests showed that the impact strength of PLA were enhanced by blending with ACR, and when the ACR content was up to 8--15%, the toughening improvement percentage reached 1000%- 1200%, while the tensile performance was not declined obviously. Then we studied how the application amount, particle size and BA-to-MMA ratio of ACR affected the results.