Mechanically robust and flame-retardant polylactide composites based on molecularly-engineered polyphosphoramides

Xue, Yijiao and Ma, Zhewen and Xu, Xiaodong and Shen, Mingxia and Huang, Guobo and Bourbigot, Serge and Liu, Xiaoqing and Song, Pingan ORCID: https://orcid.org/0000-0003-1082-652X (2021) Mechanically robust and flame-retardant polylactide composites based on molecularly-engineered polyphosphoramides. Composites Part A: Applied Science and Manufacturing, 144:106317. pp. 1-15. ISSN 1359-8368


Abstract

Intrinsic flammability significantly impedes practical applications of polylactide (PLA), despite many merits. Phosphoramides have shown exceptional flame retardancy efficiency in PLA, but to date it remains a grand challenge to create strong, tough and flame-retardant PLA based on phosphoramides due to lack of fundamental understanding of structure-property correlation. Herein, we design a series of polyphosphoramides (PPDA-x) with tunable structures and compositions. With 1.0 wt% of PPDA-8, tensile strength and toughness of PLA are increased by 11% and 44%, respectively, because of balanced hydrogen-bonding and interfacial tension. Meanwhile, the final PLA achieves a desirable UL-94V-0 rating and a high limited oxygen index (LOI) of ~26.8% because phosphorus contents and interfacial tension govern flame retardancy. This work offers a general methodology for creating robust and flame-retardant polymers by molecularly tailoring flame retardants and shedding light on their structure-property relationship.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Date Deposited: 29 Nov 2021 01:07
Last Modified: 01 Dec 2021 01:59
Uncontrolled Keywords: Polylactide; Phosphoramides; Mechanical property; Flame retardancy
Fields of Research (2008): 03 Chemical Sciences > 0303 Macromolecular and Materials Chemistry > 030304 Physical Chemistry of Materials
09 Engineering > 0912 Materials Engineering > 091202 Composite and Hybrid Materials
09 Engineering > 0912 Materials Engineering > 091209 Polymers and Plastics
09 Engineering > 0912 Materials Engineering > 091205 Functional Materials
Fields of Research (2020): 34 CHEMICAL SCIENCES > 3403 Macromolecular and materials chemistry > 340302 Macromolecular materials
40 ENGINEERING > 4016 Materials engineering > 401605 Functional materials
40 ENGINEERING > 4016 Materials engineering > 401609 Polymers and plastics
40 ENGINEERING > 4016 Materials engineering > 401602 Composite and hybrid materials
Socio-Economic Objectives (2008): E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
Socio-Economic Objectives (2020): 28 EXPANDING KNOWLEDGE > 2801 Expanding knowledge > 280105 Expanding knowledge in the chemical sciences
28 EXPANDING KNOWLEDGE > 2801 Expanding knowledge > 280110 Expanding knowledge in engineering
24 MANUFACTURING > 2409 Industrial chemicals and related products > 240910 Plastics
24 MANUFACTURING > 2409 Industrial chemicals and related products > 240908 Organic industrial chemicals (excl. resins, rubber and plastics)
24 MANUFACTURING > 2409 Industrial chemicals and related products > 240902 Bioplastics
Funding Details:
Identification Number or DOI: https://doi.org/10.1016/j.compositesa.2021.106317
URI: http://eprints.usq.edu.au/id/eprint/44055

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