| ABS resin is a thermoplastic polymer material.Because of its excellent comprehensive performance,it is widely used in machinery,automobiles,electronics,household appliances,instrumentation and construction industries.China's ABS resin consumption accounts for more than 40% of the world's total ABS resin consumption,making it the world's largest ABS resin consumer.However,when the ABS resin is exposed outdoors for a long period of time,under light,heat or ultraviolet conditions,the unsaturated bonds in the resin are prone to oxidative fracture,causing the resin to yellow and become brittle,affecting the performance and service life of the product.Anti-aging agent is a kind of auxiliary agent that can effectively prevent the aging of polymer materials.The use of anti-aging agent greatly prolongs the service life of polymer materials.So it is widely used in plastic,rubber,fiber and other synthetic materials.This subject uses 2,2,6,6-tetramethyl-4-piperidine stearate(UV-3853)as the functional monomer,using solution homopolymerization and solution copolymerization methods,respectively,using azobisisobutyl Nitrile(AIBN)or benzoyl peroxide(BPO)is used as the initiator for polymerization;in order to improve compatibility with ABS resin,styrene(ST)and acrylonitrile(AN)comonomers are introduced;to improve compounding after blending In case of material color problem,toner titanium dioxide(TiO2)was introduced;This topic discusses the effects of reaction conditions,initiator types and comonomer ratio on polymer molecular weight,and characterizes the chemical structure and properties of the polymer product.This topic also discusses the effect of the amount of polymer anti-aging agent on the mechanical properties of the composite material and the effect of the composite anti-aging agent on the mechanical properties and photothermal properties of the composite material,and makes a comparison,which has certain theoretical and practical significance.The research results of the thesis are as follows:1.Adopt solution homopolymerization method and use UV-3853 as functional monomer to prepare homopolymer PUV-3853.The best polymerization conditions: initiator n(BPO): n(UV-3853)= 1%,reaction temperature 73 ?,reaction time 8h;the yield of homopolymerization product PUV-3853 ?95%.2.Adopt solution copolymerization with styrene as comonomer;UV-3853 as functional monomer to prepare copolymerization product PST / UV-3853.Optimal polymerization conditions: molar ratio of functional monomer to comonomer: UV-3853: ST = 5: 3,initiator azobisisobutyronitrile(AIBN)content is 0.75% of the total functional monomer,polymerization temperature is At 65 ?,the reaction time is 8h.Under this condition,copolymerized PUV-3853 with relatively high molecular weight can be obtained with a yield of ?93%.3.Using the method of melt blending,PST/UV-3853,3052,TiO2 and ABS resin are blended,through the extrusion granulation,drying,injection molding process,the standard experimental spline is obtained.Test the standard experimental spline.Obtained by the test: ABS:(PST/UV-3853 / 3052): TiO2 = 1: 0.2%: 0.3%,which is the optimal ratio.Under this condition,it is obtained that the impact performance of the composite material is increased by 6.27%,the tensile performance is increased by 2.1%,the thermodynamic performance is improved,and the aging performance is qualified.Therefore,the composite material formed under this condition has the best application performance. |
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