Synergistic Flame Retardancy of Aluminum Hypophosphite and Zinc Borate in Polyethylene

doi:10.11944/j.issn.1000-0518.2016.10.160170

Chinese Journal of Applied Chemistry ›› 2016, Vol. 33 ›› Issue (10): 1147-1153.DOI: 10.11944/j.issn.1000-0518.2016.10.160170

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Synergistic Flame Retardancy of Aluminum Hypophosphite and Zinc Borate in Polyethylene

KUANG Miao,LIANG Xianhao,LIU Jianjun,RONG Jianhua()

Department of Material Science & Engineering,College of Science and Engineering,Ji'nan University,Guangzhou 510632,China

Received:2016-04-21 Accepted:2016-07-08 Published:2016-10-08 Online:2016-10-08
Contact: RONG Jianhua

Abstract

Abstract:

The polyethylene(PE) flame retardant composites were prepared via melt blending method, in which aluminium hypophosphite(AHP) and zinc borate(ZB) were used as flame retardant agents. The results show that AHP and ZB disperse homogeneously in the PE matrix. When AHP is used as flame retardant individually, the resulted composite has the limit oxygen index(LOI) of 25% and passes V-2 on the vertical flammability test(UL-94), which proves that AHP has good effect on improving the flame retardancy of PE. With the addition of ZB, the composites have the LOI value as high as 27.2% and pass the UL-94(3.2 mm) V-1 when the mass ratio of AHP to ZB is 21:4. AHP and ZB can improve the thermal stability and total char residues at 650 ℃ simultaneously. When the mass ratio of AHP to ZB is 17:8, the residue is increased to 25.7%.

Key words: aluminum hypophosphite, zinc borate, flame retardancy, polyethylene, flame retardant mechanism

KUANG Miao, LIANG Xianhao, LIU Jianjun, RONG Jianhua. Synergistic Flame Retardancy of Aluminum Hypophosphite and Zinc Borate in Polyethylene[J]. Chinese Journal of Applied Chemistry, 2016, 33(10): 1147-1153.

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Synergistic Flame Retardancy of Aluminum Hypophosphite and Zinc Borate in Polyethylene

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