文章摘要
Preparation and Properties of Flame Retardant NR Composites with Basic Magnesium Carbonate
Received:January 04, 2021  Revised:January 04, 2021
DOI：10.12136/j.issn.1000-890X.2022.05.0347
Key Words: basic magnesium carbonate；NR；composite；vulcanization characteristics；physical property；flame retardancy
Author NameAffiliationE-mail
WEN　Yuan* Wuhan Kingfa Technology Co. ，Ltd；Kingfa Science and Technology Co. ，Ltd 18086017936@163.com 
ZHANG　Fei Wuhan Kingfa Technology Co. ，Ltd  
SHEN Jiawei Wuhan Kingfa Technology Co. ，Ltd  
HE Liuwei Wuhan Kingfa Technology Co. ，Ltd；Kingfa Science and Technology Co. ，Ltd  
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Abstract:
      The flame retardant rubber composites were prepared by adding basic magnesium carbonate to natural rubber（NR），and the effect of basic magnesium carbonate on the properties of NR composites was studied. The results showed that with the increase of the amount of basic magnesium carbonate，the vulcanization torque of the NR compound increased，the scorch time was shortened，the tensile stress at 300% elongation and tear strength of the vulcanizate increased at first and then decreased，the oxygen index gradually increased，and the flame retardancy was improved. The decomposition temperature range of basic magnesium carbonate was wide，and the residual carbon of NR vulcanizate filled with basic magnesium carbonate was dense and evenly covered on the vulcanizate surface.
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