Synthesis Of A New Macromolecular Antioxidant With Good Resistance Migration And The Research Of It's Properties

In recent years,Rubber materials are widely used.With the development of rubber industry,the output and the variety of rubber increased,Rubber materials are used in various fields such as construction,automobile,aerospace and heavy machinery.However,the rubber material itself is easy to aging,which greatly impact its service life and application.In order to solve the aging of rubber,it is necessary to add antioxidants in rubber,so as to inhibit or delay the aging process of rubber and extend its service life.However,the antioxidants that we use today has many shortcomings such as pollution,cancer,easy to migration.At present,China's antioxidants industry also has big problems,mainly concentrated in excess capacity,unreasonable product structure,serious environmental pollution and so on.In order to improve the efficiency of antioxidant,reduce its pollution to the outside world and promote the technological innovation of the antioxidant industry,a new type of macromolecular antioxidant with good resistance migration was designed and invented in this paper.In this paper,styrene-malic anhydride(MAH),styrene-glycidyl methacrylate(GMA)and cashew phenol glycidyl ether(CGE)were selected as three carriers,which were chemically bonded with p-amino-diphenylamine(PPDA)respectively.The product was characterized by FITR,H-NMR,GPC and other means to determine the success of styrene-MAH and styrene-GMA copolymerization respectively,and then to determine the successful reaction of the three carriers with PPDA,to obtain the compounds with the expected structure.Then the product was mixed with styrene butadiene rubber/carbon black composite.The obtained materials are tested for tensile strength,aging,migration,RPA,SEM and AFM.It was found that the antioxidants which used two copolymers,styrene-MAH and styrene-GMA,as carriers had poor compatibility and dispersion in the rubber matrix,which caused great damage to the mechanical properties of the rubber composite.However,the migration performance of the antioxidant was significantly improved compared with the 4010NA,which is commonly used in industly.The antioxidant that use CGE,a natural macromolecular carrier,can be well compatible and dispersed in the rubber matrix,which not only does no damage to the mechanical properties of the rubber matrix,but also improves the aging resistance and the resistance migration of the antioxidant.It is superior to 4010NA in terms of short-term anti-aging,long-term anti-aging and migration resistance.