Synergy effect between quaternary phosphonium ionic liquid and ammonium polyphosphate toward flame retardant PLA with improved toughness

被引:122
作者
Jia, Yun-Wan [1 ]
Zhao, Xi [1 ]
Fu, Teng [1 ]
Li, De-Fu [1 ]
Guo, Yan [1 ]
Wang, Xiu-Li [1 ]
Wang, Yu-Zhong [1 ]
机构
[1] Sichuan Univ, Coll Chem, Chengdu 610064, Peoples R China
基金
中国国家自然科学基金;
关键词
Ionic liquid; Poly(lactic acid); Flame retardant; Ammonium polyphosphate; Synergy; POLYLACTIC ACID; THERMAL-DECOMPOSITION; BIODEGRADABLE POLYESTERS; MECHANISM; BEHAVIOR; FLAMMABILITY; DEGRADATION; OXIDE;
D O I
10.1016/j.compositesb.2020.108192
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The development of poly(lactic acid) (PLA) composites having flame retardancy, tensile toughness and transparency is the state-of-the-art, which requires meticulous selection and combination of additives. To achieve this goal, an ionic liquid (IL) tetrabutylphosphonium tetrafluoroborate is synthesized and used as a synergist for ammonium polyphosphate (APP). Due to the high synergistic effect between them, only 1.5 wt% IL and 1.5 wt% APP (total amount of 3 wt%) can endow PLA with fire safety, i.e. limiting oxygen index (LOI) of 27.2, UL 94 V-0 rating and low heat release rate of 290 kW m(-2). Besides, the elongation at break of PLA containing 3 wt% IL/ APP increases from 8.5% of PLA to 204.6%. Meanwhile, the incorporation of IL/APP has tiny impact on the transparency of PLA. The PLA/IL/APP possessing toughness and flame retardancy shows great potentials in the fields of packaging, automotive and electronic and electric industry in the future.
引用
收藏
页数:11
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