Journal
ISCIENCE
Volume 25, Issue 3, Pages -Publisher
CELL PRESS
DOI: 10.1016/j.isci.2022.103950
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Funding
- National Natural Science Foundation of China [52073246, 51873196]
- Australian Research Council [DP190102992, FT190100188]
- Natural Science Foundation of Zhejiang Province [LY20E030001]
- Australian Research Council [FT190100188] Funding Source: Australian Research Council
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The extreme flammability of polylactide (PLA) hampers its practical applications. This study investigates how the melt viscosity affects the fire performance of PLA. The results show that the melt flow index (MFI) has a significant impact on the fire performances of pure PLA and its fire-retardant systems.
Extreme flammability of polylactide (PLA) has restricted its real-world applications. Traditional research only focuses on developing new effective fire retardants for PLA without considering the effect of melt viscosity on its fire performances. To fill the knowledge gap, a series of PLA matrices of varied melt flow index (MFI) with and without fire retardants are chosen to examine how melt viscosity affects its fire performances. Our results show that the MFI has a governing impact on fire performances of pure PLA and its fire-retardant systems if the samples are placed vertically during fire testing. PLA with higher MFI values achieves higher limiting oxygen index (LOI) values, and a lower loading level of fire retardants is required for PLA to pass a UL-94 V-0 rating. This work unveils the correlation between melt viscosity and their fire performance and offers a practical guidance for creating flame retardant PLA to extend its applications.
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