Study On The Natural Rubber Modified By Mechano-chemical Reclaimed Rubber And Its Reinforcement Mechanism

The resource utilization of reclaimed rubber could effectively improve the comprehensive quality of rubber products and reduce production cost.At the same time to solve the waste rubber hoarding and recycling had remarkable social significance.This article,triethylenetetramine has been used as a regenerant by mechanochemical method damage rubber crosslinking network structure preparation and regeneration of rubber.Study on the internal structure and the curing reaction kinetics,the optimum curing temperature,the reaction rate constant and activation energy;then reclaimed rubber hybrid with carbon black,silica and silica modified reinforced natural rubber,and the reinforcing mechanism was analyzed.Preparation of reclaimed rubber by mechanical chemical method.The kinetics of vulcanization reaction of the regenerated rubber internal structure and different vulcanization stages was studied by means of thermogravimetric analysis(TG)and scanning electron microscopy(SEM).The recycled rubber containing 41.85% rubber hydrocarbon and 10.48% carbon black,reclaimed rubber also existed in some non-desulfurized rubber powder,as regeneration the use of reclaimed rubber would be reunited in the rubber products that formation of porous structure defects.The reaction activation rate was gradually increased from the heat vulcanization period to the flat vulcanization stage,and the reaction rate gradually decreased with the increase of the vulcanization temperature.Study on the reinforcement of natural rubber with carbon black and reclaimed rubber hybrid.For the excessive amount of carbon black was likely to cause reunion,stacked in the rubber matrix in the formation of defective structure of the problem,the introduction of dispersibility and plasticity of the elastic filler of renewable rubber,and carbon black and reinforced natural rubber.Small molecules could be used as rubber regeneration plasticizer,could effectively alleviate the agglomeration of carbon black particles,improved carbon black particles and natural rubber matrix interface compatibility,so as to enhance the comprehensive performance of natural rubber.Study on surface modification of silica and reinforcement of natural rubber with carbon black and reclaimed rubber hybrid.Due to the large surface area of silica,the surface activity was high,and the surface energy of the rubber matrix was large,which made the poor compatibility.In order to reduce the surface energy and increase the interface compatibility,the use of wet surface modified silica,in the natural rubber and recycled rubber mixing process would be modified by silane coupling agent in accordance with a certain percentage of the mixture into the mixing,expected that the crosslinking reaction of natural rubber and recycled rubber could be involved in the vulcanization process.Finially improved the dispersion of silica particles and strengthen the chemical bonding between silica and natural rubber to achieve the purposes of reclaimed rubber and silica hybrid reinforced natural rubber.