Preparation And Properties Study On RPET/PE Blends

The rPET/HDPE blends were prepared by using rPET as matrix material, HDPE as toughening material, Maleic anhydride grafted Polyolyaltha Olfin (MAH-g-POE), Ethylene Acrylic Acid(EAA)as compatibilizer, sodium carbonate, Cerium oxide as nucleating agent. The effect of compatibilizers on the crystal behave of rPET/HDPE blends were investigated through Differential Scanning Calorimeter(DSC), The effect of compatibilizers and nucleating agents on the morphology and compatibility of rPET/HDPE blends were investigated by Scanning Electronic Microscope (SEM). The storage modulus of rPET/HDPE alloy was detected by using DMA analysis. The melt rheology and mechanical properties of rPET/HDPE blends was also investigated.The rPET/mLLDPE alloy material were prepared by using rPET as matrix material, mLLDPE as toughening material, Maleic anhydride grafted Ethylene-Propylene-Diene Monomer (MAH-g-EPDM), maleic anhydride grafted linear low density polyethylene(MAH-g-LLDPE), Maleic anhydride grafted Polyolyaltha Olfin (MAH-g-POE) as compatibilizer. The effect of compatibilizers on glass transition temperature and Crystallization properties of rPET/mLLDPE blends were investigated through Differential Scanning Calorimeter(DSC). The effect of compatibilizers on the morphology and compatibility of rPET/mLLDPE blends were investigated by Scanning Electronic Microscope (SEM). The storage modulus of rPET/HDPE alloy was detected by using DMA analysis. The melt rheology and mechanical properties of rPET/HDPE blends was also investigated.The results show that, when adding MAH-g-POE and EAA in it, The effect of compatibilizers on the morphology and compatibility of rPET/HDPE blends are improved. In molten plasticizing process, the torque values was also increased. In rPET/HDPE blends, which contain 30% HDPE in it, the crystallization temperature Tc was 217.69℃, compared with rPET, it increased by 43.19℃, the crystallization rate was higher than pure rPET. Adding sodium carbonate, Cerium oxide in it, the tensile strength and bending strength are obviously improved in the alloy materials, but the elongation at break was of was declined slightly. With the increase of MAH-g-LLDPE, MAH-g-EPDM, MAH-g-POE compatibilizers, the mLLDPE spherical particles were embedded in rPET matrix material. The interaction between the two phase materials and is improved, and also the torque values. The effect of MAH-g-LLDPE compatilizer on rPET/mLLDPE was better than MAH-g-EPDM, but worse than MAH-g-POE. The rPET/mLLDPE blends, which impact strength was better than rPET/HDPE material, has slower crystallization rate and longer shape cycle.