Study on Mechanical Property of Polylactic Acid Toughened by Polyacrylate Microsphere

Xiao Li Song; Ying Chen; Yu Zhi Xu; Chun Peng Wang

doi:10.4028/www.scientific.net/AMR.781-784.390

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The Effect of Specific Surface Area on the Solid Grafting Reaction of Maleic Anhydride-Grafted Polypropylene
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Study on Mechanical Property of Polylactic Acid Toughened by Polyacrylate Microsphere
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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 781-784Study on Mechanical Property of Polylactic Acid...

Study on Mechanical Property of Polylactic Acid Toughened by Polyacrylate Microsphere

Abstract:

Polyacrylate microsphere with different core/shell ratio (mass ratio) were prepared by semi-continuous seed emulsion copolymerization using butyl acrylate (BA) and methyl methacrylate (MMA) as main monomers，which were used to toughen polylactic acid (PLA) after drying. The effect of core/shell ratio of polyacrylate toughening agent (ACR) on mechanical properties of PLA was studied. The results showed that when adding 8wt%ACR, the impact strength and elongation at break of PLA were both first increased and then decreased as increasing of core/shell ratio, while the tensile strength loss of PLA was little changed. It is found that the impact strength was increased about 24% than that of neat PLA as well as the elongation at break was increased from 2% to 12% when the ratio was 7/3, which was the best ratio.