Abstract
To improve the thermal stability and flame retardancy of poly(vinyl chloride) (PVC) based composites, magnesium borate hydrate-mechanically activated lignin (MBH-MAL) complex was in-situ synthesized by hydrothermal method for using as a novel additive. In addition, MBH-lignin (MBH-L) complex, MAL, MBH, and common mixing of MBH and MAL (MBH+MAL) were also prepared for comparative investigation. MBH-MAL showed synergistic improving effect on PVC as MBH-MAL/PVC composite exhibited excellent thermal stability and flame retardancy. The static thermal stability time was 871 s and limit oxygen index was 32.54%, indicating that MBH-MAL effectively inhibited the generation of HCl from thermal decomposition of PVC and prevented the combustion of PVC based composites in air. MBH-MAL/PVC composite still exhibited outstanding tensile and flexural properties. Moreover, the enhancing mechanism of MBH-MAL on the thermal stability and flame retardancy of PVC based composites was proposed.
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Acknowledgements
This research was supported by National Natural Science Foundation of China (Nos. 21666005 and 22068007), Guangxi Natural Science Foundation, China (Nos. 2017GXNSFEA198001 and 2019GXNSFDA245020), and the Scientific Research Foundation of Guangxi University, China (Grant No. XJPZ160713).
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Zhang, W., Wu, H., Zhou, N. et al. Enhanced Thermal Stability and Flame Retardancy of Poly(Vinyl Chloride) Based Composites by Magnesium Borate Hydrate-Mechanically Activated Lignin. J Inorg Organomet Polym 31, 3842–3856 (2021). https://doi.org/10.1007/s10904-021-02019-9
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DOI: https://doi.org/10.1007/s10904-021-02019-9