Mechanically robust and flame-retardant poly(lactide)/poly(butylene adipate-co-terephthalate) composites based on carbon nanotubes and ammonium polyphosphate

Ping Wang; Zhenfeng Wang; Tong Yan; Liyuan Yang; Li Yang; Jiacheng Ling; Shaojie Feng; Pei Xu; Yunsheng Ding

doi:10.1016/j.ijbiomac.2022.09.033

Mechanically robust and flame-retardant poly(lactide)/poly(butylene adipate-co-terephthalate) composites based on carbon nanotubes and ammonium polyphosphate

Int J Biol Macromol. 2022 Nov 30:221:573-584. doi: 10.1016/j.ijbiomac.2022.09.033. Epub 2022 Sep 8.

Authors

Ping Wang¹, Zhenfeng Wang², Tong Yan³, Liyuan Yang⁴, Li Yang⁵, Jiacheng Ling⁶, Shaojie Feng⁷, Pei Xu⁸, Yunsheng Ding³

Affiliations

¹ Anhui Province International Research Center on Advanced Building Materials, School of Materials and Chemical Engineering, Anhui Jianzhu University, Hefei 230601, China; National and Local Joint Engineering Research Center for Special Wire and Cable Branch Center of Anhui Jianzhu University, Hefei 230601, China. Electronic address: anjzwp@ahjzu.edu.cn.
² Anhui Province International Research Center on Advanced Building Materials, School of Materials and Chemical Engineering, Anhui Jianzhu University, Hefei 230601, China; Provincial Key Laboratory of Advanced Functional Materials and Devices, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, China.
³ Provincial Key Laboratory of Advanced Functional Materials and Devices, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, China.
⁴ National and Local Joint Engineering Research Center for Special Wire and Cable Branch Center of Anhui Jianzhu University, Hefei 230601, China.
⁵ Anhui Province International Research Center on Advanced Building Materials, School of Materials and Chemical Engineering, Anhui Jianzhu University, Hefei 230601, China; National and Local Joint Engineering Research Center for Special Wire and Cable Branch Center of Anhui Jianzhu University, Hefei 230601, China.
⁶ National and Local Joint Engineering Research Center for Special Wire and Cable Branch Center of Anhui Jianzhu University, Hefei 230601, China; Anhui Province Engineering Laboratory of Advanced Building Materials, School of Materials and Chemical Engineering, Anhui Jianzhu University, Hefei 230601, China.
⁷ Anhui Province International Research Center on Advanced Building Materials, School of Materials and Chemical Engineering, Anhui Jianzhu University, Hefei 230601, China; Anhui Province Key Laboratory of Advanced Building Materials, School of Materials and Chemical Engineering, Anhui Jianzhu University, Hefei 230601, China.
⁸ Provincial Key Laboratory of Advanced Functional Materials and Devices, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, China. Electronic address: chxuper@hfut.edu.cn.

PMID: 36087754
DOI: 10.1016/j.ijbiomac.2022.09.033

Abstract

In order to synchronously improve mechanical and flame retardant properties of polylactide/poly(butylene adipate-co-terephthalate) (PLA/PBAT) composites, a series of multifunctional composites containing multi-walled carbon nanotubes (CNTs), ammonium polyphosphate (APP) and a commercial multifunctional epoxy oligomer (MEO) as chain extender were prepared via melt blending. The results show that the optimal flame retardant properties of PLA5-PBAT5/10A/6C composite containing 6 % CNTs and 10 wt% APP, presented the limited oxygen index reached 28.3 % and exhibited a decrease in peak heat release rate (pHRR) and total heat release (THR) to 368 kJ/m² and 72 MJ/m², respectively because of the co-continuous phase, CNTs network and condensed effect of APP. Meanwhile, the construction of co-continuous phases endows PLA5-PBAT5 with better mechanical compared to PLA8-PBAT2 composites. The elongation at break reaches (245.9 %) and notched impact strength (16.5 kJ/m²) of PLA5-PBAT5/10A/6C were higher than the PLA8-PBAT2/10A/6C by 16.0 and 283.7 %.

Keywords: Flame retardancy; Mechanical properties; Polylactide.

MeSH terms

Adipates
Ammonium Compounds*
Flame Retardants*
Nanotubes, Carbon*
Polyesters
Polyphosphates

Substances

poly(lactide)
Polyphosphates
Flame Retardants
Nanotubes, Carbon
Ammonium Compounds
butylene
terephthalic acid
Polyesters
adipic acid
Adipates