期刊
COMPOSITES COMMUNICATIONS
卷 6, 期 -, 页码 1-5出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.coco.2017.07.005
关键词
Flame retardancy; Toughness; Polylactic acid; Ammonia polyphosphate; Poly(ethylene glycol)
资金
- Scientific Research Foundation of Zhejiang A F University [2055210012]
- National Natural Science Foundation of China [51303162, 51628302]
- Zhejiang Provincial Natural Science Foundation of China [Q15C160002]
- Program for Key Science and Technology Team of Zhejiang Province [2013TD17]
- Commonwealth Project of Science and Technology Agency of Zhejiang Province of China [2017C37078]
- Chinese Academy of Forestry [2014SY02]
- Zhejiang Province [2014SY02]
Although the flammability of biodegradable poly(lactic acid) (PLA) has been effectively addressed so far, the resultant flame retardant PLA still displays a high brittleness, extremely restricting its wide applications in electrical, automobile and aerospace fields. In this work, we have demonstrated the fabrication of flame retardant and tough PLA composites by combining ammonia polyphosphate (APP) and poly(ethylene glycol) (PEG) with a molecular weight of 20,000 via the melt-blending strategy. The results show that the peak heat release rate of PLA can reduce by 14% in cone tests and a V-0 rating is achieved in vertical burning tests by adding 7 wt% of APP and 14 wt% PEG. Moreover, such PLA composite shows a high strain at break of 280% and impact strength of 14.9 kJ/m(2), respectively increasing by thirty-eight-fold and two-fold relative to the PLA bulk. The results strongly indicate that flammability and brittleness of the PLA are strikingly reduced. This work provides an integrated strategy for creating advanced green polymer composites with exceptional flame resistance and toughness.
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