文章摘要
Application of Halogen-free Composite Flame Retardant in NR Compound
Received:March 14, 2019  Revised:March 14, 2019
DOI：10.12136/j.issn.1000-890X.2020.03.0200
Key Words: NR；magnesium hydroxide；aluminate coupling agent；surface modification；composite flame retardant；physical property；combustion performance
Author NameAffiliationE-mail
YAN Chuang Qingdao University of Science and Technology 254480428@qq.com 
CHENG Qingkui Qingdao University of Science and Technology  
BAI Pengxiang Qingdao University of Science and Technology  
SUN Dongli Shandong Zhiheng Vibration Reduction Technology Co.，Ltd  
LIN Runxiong* Qingdao University of Science and Technology 254480428@qq.com 
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Abstract:
      Abstract：In this study，magnesium hydroxide was surface modified by using aluminate coupling agent，and then halogen-free composite flame retardant was formulated by using the modified magnesium hydroxide，aluminum hydroxide，antimony trioxide，and phosphorus-based，nitrogen-based and siliconbased flame retardants. The dispersion of the halogen-free composite flame retardant in NR was studied，and the effects of the composite flame retardant on the vulcanization characteristics，physical properties and combustion properties of NR compound were investigated. The results showed that，compared with the NR compound filled with unmodified magnesium hydroxide，t10 of the NR compound filled with modified magnesium hydroxide or the composite flame retardant was significantly longer，the crosslinking degree increased，and the tensile strength and elongation at break of the ulcanizates were improved. The flame retardant property of the NR vulcanizates filled with modified magnesium hydroxide/ammonium polyphosphate/melamine composite flame retardant was the best，and that of the NR vulcanizates filled with magnesium hydroxide and modified magnesium hydroxide was poor. It was found that the dispersion of modified magnesium hydroxide/ammonium polyphosphate/melamine composite flame retardant in NR compound was quite uniform.
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