One-Pot, Solvent- and Catalyst-Free Synthesis of Polyphosphoramide as an Eco-Benign and Effective Flame Retardant for Poly(lactic acid)
Article
Feng, Jiabing, Xu, Xiaodong, Xu, Zhiguang, Xie, Hongyan, Song, Pingan, Li, Lujuan, Huang, Guobo and Wang, Hao. 2020. "One-Pot, Solvent- and Catalyst-Free Synthesis of Polyphosphoramide as an Eco-Benign and Effective Flame Retardant for Poly(lactic acid)." ACS Sustainable Chemistry and Engineering. 8 (44), pp. 16612-16623. https://doi.org/10.1021/acssuschemeng.0c05931
| Article Title | One-Pot, Solvent- and Catalyst-Free Synthesis of Polyphosphoramide as an Eco-Benign and Effective Flame Retardant for Poly(lactic acid) |
|---|---|
| ERA Journal ID | 200101 |
| Article Category | Article |
| Authors | Feng, Jiabing (Author), Xu, Xiaodong (Author), Xu, Zhiguang (Author), Xie, Hongyan (Author), Song, Pingan (Author), Li, Lujuan (Author), Huang, Guobo (Author) and Wang, Hao (Author) |
| Journal Title | ACS Sustainable Chemistry and Engineering |
| Journal Citation | 8 (44), pp. 16612-16623 |
| Number of Pages | 12 |
| Year | 2020 |
| Publisher | American Chemical Society |
| Place of Publication | United States |
| ISSN | 2168-0485 |
| Digital Object Identifier (DOI) | https://doi.org/10.1021/acssuschemeng.0c05931 |
| Web Address (URL) | https://pubs.acs.org/doi/10.1021/acssuschemeng.0c05931 |
| Abstract | Despite many merits, biobased and biodegradable poly(lactic acid) (PLA) suffers from inherently high flammability, significantly impeding its practical applications in the areas of packaging, fibers, electric and electronics, etc. Phosphoramides-based flame retardants have demonstrated exceptional flame retardancy in PLA only at very low loading levels. Unfortunately, exiting synthetic processes of phosphoramides often involve the use of a huge amount of organic solvents, presenting a potential threat to the ecosystem and human beings, in addition to high production costs. Herein, we report a one-pot, solvent- and catalyst-free, and green approach for the synthesis of a polyphosphoramide (DM-H) via two-step polycondensation between dimethyl methylphosphonate (DMMP) and 1,6-hexanediamine (HDA). As-synthesized DM-H exhibits exceptional flame-retardant efficiency in the PLA while preserving the mechanical properties of the PLA. The addition of only 2 wt % DM-H enables the PLA to achieve a desirable V-0 rating during vertical burning tests and a high limited oxygen index (LOI) value of 29.7%, because the DM-H can act both in the gas and condensed phases. Moreover, the tensile strength is of 59.7 MPa comparable to 62.1 MPa of the bulk PLA. This work offers an innovative and green approach for the synthesis of polyphosphoramides to create high-performance sustainable PLA materials with balanced flame retardancy and mechanical performances. |
| Keywords | Solvent-free synthesis; Polyphosphoramide; Flame retardant; Poly(lactic acid); Mechanical properties |
| Contains Sensitive Content | Does not contain sensitive content |
| ANZSRC Field of Research 2020 | 340302. Macromolecular materials |
| 401605. Functional materials | |
| 401609. Polymers and plastics | |
| 401602. Composite and hybrid materials | |
| Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
| Byline Affiliations | Centre for Future Materials |
| Zhejiang A & F University, China | |
| Jiaxing University, China | |
| Taizhou University, China | |
| Institution of Origin | University of Southern Queensland |
| Funding source | Australian Research Council (ARC) Grant ID DP190102992 |
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