Study on modification of polyactic acid by natural rubber
GUO Duyu， WENG Fangqing， WU Qiangxian
Green Polymer Laboratory and Laboratory of Pesticide & Chenical Biology， Key Laboratary of the Ministry of Education， College of Chemistry， Central China Normal University， Wuhan 430079， China
Abstract：In order to better apply polylactic acid (PLA) which an environment-friendly polymer material that can be completely degraded in the environmental plastics， and to overcome its inherent brittleness， the natural rubber (NR) with good toughness， biocompatibility and low cost was selected to modify it. NR-PLA composites with different NR mass fraction (5%-15%) were prepared by dynamic vulcanization melting processing. The mechanical property test showed that the elongation at break increased from 7.3% (PLA) to 41.1% after adding 10% NR， indicating that NR increased the toughness of PLA. This study would promote the further application of PLA.
2020, Vol. 54 
