Abstract
AbstractThe polylactic acid plasticized by epoxidized crude rubber seed oil (EcRSO) was prepared by using a Brabender mixer to improve the ductility of polylactic acid (PLA). The weight ratios of PLA/EcRSO were changed from 100/0 to 90/10. The tensile properties proved that the addition of EcRSO to PLA led to a strong increase in elongation at break (815 %) and a very strong increase in tensile toughness (1370 %), but a decrease in tensile strength. The plasticization of PLA with EcRSO lowered the Tg as well as cold‐crystallization temperature. The initial weight loss temperature grew from 261.8 to 308.8 oC and the weight loss at 380 oC of PLA reduced from 90.9 to 83.2 % with the presence of 5 wt.% EcRSO. Based on the overall results of this investigation, EcRSO could be used as an environmental friendly plasticizer to replace petroleum‐based plasticizers in improvement the overall properties of PLA.
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