Preparation And Properties Of Touching & Chain-extending Additives Of RPET

Improving the technology of PET bottles material recyling, is not only meaningful to solve the pollution caused by plastic abuse, but also reduce the energy consumption of the community. In this paper, with Glycidyl methacrylate (GMA) as the monomer, POE-g-GMA, EPDM-g-GMA were prepared by solution grafting reaction, and GMA-MMA-BA, GMA-IBOMA-BA were prepared by solution grafting reaction copolymerization reaction. These touching & chain-extending additives are used for blending modification of rPET.Experimental results show that, optimal mass ratio of POE/EPDM:St:GMA is 100:4:4, DCP content was 0.3g given POE/EPDM content 100g and toluene was the appropriate solvent when optimum process parameters were that reaction time was 60 min, temperature was 120℃.In this case, for the highest POE-g-GMA grafting ratio was about 1.33% for the highest EPDM-g-GMA grafting ratio was about 1.75%.Experimental results show that, from the chain extension effect, elastomer with high graft ratio makes the rPET melt fluidity reduced. From the toughening effect, the graft elastomer was introduced to take place part of rPET in the blends with the composition of 80/20 that exhibited brittle fracture behavior, with the impact strength of blends increased about 7 times. From the hot performance, the graft elastomer has damaging effects on the rPET crystallization.Experimental results show that, the epoxy acrylate copolymer has a tackifying effect to the rPET melt. The modified rPET blends exhibited higher torque with increasing the content and the polymerization degree of the epoxy acrylate copolymer. Under conditions of low filling amount, epoxy acrylates copolymer can improve the impact strength rPET effectively. With the content of GMA and soft monomer BA content increased, toughening effect of the epoxy acrylate copolymer increases.