“重油”与苯乙烯共聚改性胶粉增韧废PP复合材料的研究

Study on Toughening Waste Polypropylene with Rubber Crumb Modified by Heavy Oil and Styrene Copolymer

用“重油”与苯乙烯共聚改性胶粉增韧废ＰＰ。探讨了２种共聚单体的摩尔比和单体与胶粉的配比对共聚反应的影响以及单体与胶粉配比和改性胶粉用量对复合材料力学性能的影响。研究表明：共混可强化未反应的剩余单体的聚合；当“重油”与苯乙烯摩尔比为１、改性胶粉与单体用量相同、１００份废ＰＰ中加入２０份改性胶粉时，复合材料的抗冲击强度比废ＰＰ提高了１倍，拉伸强度为废ＰＰ的７９３％。冲击断面ＳＥＭ及ＴＥＭ观察表明，改性胶粉与废ＰＰ界面相容性良好。

The rubber crumb modified by heavy oil and styrene copolymer was used to toughen waste PP.The influence of the two monomers mole ratio and their proportion to rubber crumb on the copolymerization and the influence of the proportion of monomers to rubber crumb and the level of modified rubber crumb on the physical properties of PP composite were investigated.The results showed that the polymerization of the residual unreacted monomers was promoted by blending;the impact strength and tensile strength of the composite were respectively 100% and 79.3% higher than those of the waste PP when the mole ratio of heavy oil and styrene was 1,the level of modified rubber crumb was the same as that of monomers,and 20 parts of modified rubber crumb were used in 100 parts of waste PP.The SEM and TEM view on the impact section showed a compatible interface between the modified rubber crumb and the waste PP.