Toughening and flame retardant properties of polylactic acid
ZHANG Ai-ling
JIANG Hui
GUAN Yin-yan
WANG Song
LI San-xi
Abstract：Aiming at such defects of polylactic acid(PLA) as the inflammability and high brittleness,PLA was modified with ammonium polyphosphate(APP) and polyethylene glycol(PEG). Meanwhile, the weight ratio was set as 5.7(PLA):1.17(APP):1(PEG), and the effect of liquid crystal polymer(LCP) on the flame retardant and mechanical properties of composites was investigated. The results show that when the mass fraction of added APP is 15%,the limit oxygen index(LOI) of composites increases to 30.1%. While only adding the PEG with the same mass fraction, the composites can not reach the flame retardant effect. Compared with the pure PLA,the PLA/PEG/APP composites have higher char yield. After adding PEG,the elongation at break obviously increases. While the addition of LCP increases the tensile strength of composites,but reduces the elongation at the break of composites.
Keywords：polylactic acid(PLA)inflammabilityammonium polyphosphate(APP)polyethylene glycol(PEG)liquid crystal polymer(LCP)char yieldtensile strengthelongation at break
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 157-162 )