Flame retardant and mechanically tough poly(lactic acid) biocomposites via combining ammonia polyphosphate and polyethylene glycol

Sun, Yiqi and Sun, Shuai and Chen, Lei and Liu, Lina and Song, Pingan and Li, Wei and Yu, Youming and Lu, Fengzhu and Qian, Jun and Wang, Hao (2017) Flame retardant and mechanically tough poly(lactic acid) biocomposites via combining ammonia polyphosphate and polyethylene glycol. Composites Communications, 6. ISSN 2452-2139


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/m2, 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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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials
Date Deposited: 14 Nov 2017 00:24
Last Modified: 23 Apr 2018 23:16
Uncontrolled Keywords: flame retardancy; toughness; polylactic acid; ammonia polyphosphate; poly(ethylene glycol)
Fields of Research : 03 Chemical Sciences > 0303 Macromolecular and Materials Chemistry > 030301 Chemical Characterisation of Materials
Socio-Economic Objective: B Economic Development > 86 Manufacturing > 8603 Processed Non-Food Agriculture Products (excl. Wood, Paper and Fibre) > 860399 Processed Non-Food Agricultural Products (excl. Wood, Paper and Fibre) not elsewhere classified
Identification Number or DOI: 10.1016/j.coco.2017.07.005
URI: http://eprints.usq.edu.au/id/eprint/32880

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