Flame retardant, combustion and thermal degradation properties of polypropylene composites treated with the mixture of pentaerythritol, nickel hydroxystannate and expandable graphite. (September 2022)

• Record Type: Journal Article
• Authors: Gao, Quan; Zhao, He; Zhou, Xue-Ling; Liu, Fu-Ya; Jiao, Yun-Hong; Xie, Ji-Xing; Qu, Hong-Qiang; Xu, Jian-Zhong; Ma, Hai-Yun
• Is Part Of: Polymer degradation and stability. Volume 203(2022)
• Publication Date: 2022-09
• Subjects: NiSn(OH)6 -- Expandable graphite -- Polypropylene -- Flame retardant -- Thermal degradation; NiSn(OH)6 NHS -- Expandable graphite EG -- Polypropylene PP; Polymers -- Deterioration -- Periodicals; Stabilizing agents -- Periodicals; Polymères -- Dégradation -- Périodiques; Stabilisants -- Périodiques; 668.9
• DOI: 10.1016/j.polymdegradstab.2022.110084
• Languages: English
• ISSNs: 0141-3910

Abstract

Highlights: Spherical nickel hydroxystannate (NHS) was prepared by a simple co-precipitation method. When compared with PP/2PER, the total heat release and total smoke production of PP/2PER/28EG/2NHS were reduced by 87% and 99%, respectively. The effects of PER, EG, NHS, 2PER/30EG, 2PER/30NHS, 2PER/28EG/2NHS on the thermal degradation properties of PP were studied by the calculated and experimental TG and DTG curves systematically. Abstract: Spherical nickel hydroxystannate (NiSn(OH)6, NHS) particles were successfully prepared by a simple co-precipitation method and added into polypropylene (PP) matrix together with pentaerythritol (PER) and expandable graphite (EG). The flame-retardant, smoke suppressant and thermal degradation properties of PP composites were studied systematically. The results showed that the PP composite with 2phr PER, 28 phr EG and 2 phr NHS (PP/2PER/28EG/2NHS) passed the UL-94 V-0 level, and its total heat release and total smoke production were reduced by 87% and 99% when compared with those of the PP/2PER composite, and reduced by 30% and 67% when compared with those of the PP/2PER/30EG sample. The char residue of PP/2PER/28EG/2NHS composite is composed of the hexagonal Chaoite, rhombohedral graphite, SnO2 and a little NiO. 2 phr PER has no effect on promoting the char formation of PP; 30phr NHS could accelerate the decomposition and decrease the char formation of PP; 30phr EG could suppress the decomposition and promote the char formation of PP; 2PER/28EG/2NHS could promote the early thermal degradation, slow down the thermal degradation velocity of PP and results in a higher char formation.