The Properties of Composites of Natural Rubber/Nano Magnesium Hydroxide in-situ Prepared Through Microwave Radiation
Skim rubber was efficiently coagulated by microwave radiation and magnesium hydroxide(Mg(OH)2) in-situ prepared through magnesium chloride(MgCl2) and ammonia,the distribution of Mg(OH)2 in the skim rubber was observed through the scanning electron microscopy(SEM) and the effect of different Mg(OH)2 contents on the vulcanization properties,mechanical properties and thermal stability of skim rubber was investigated.The results showed that Mg(OH)2 has a great influence on the vulcanization properties of skim rubber,and the mechanical properties of skim rubber were decreased with the increase of Mg(OH)2 contents,meanwhile,the thermal stability of skim rubber was slightly increased.The diameter of Mg(OH)2 was about 20 nm,and Mg(OH)2 was uniformly dispersed in skim rubber when Mg(OH)2 contents are no more than 5%;but the diameter of Mg(OH)2 became larger,and Mg(OH)2 was easier to agglomerate and nonuniformly dispersed in skim rubber when Mg(OH)2 contents were more than 10%.