SiO2 nano particle, through surface modification by silicane coupling agent KH-570, was successfully applied to make nano SiO2/PP composite material by the melt-out blending process with twin-screw extruder. Effects o...SiO2 nano particle, through surface modification by silicane coupling agent KH-570, was successfully applied to make nano SiO2/PP composite material by the melt-out blending process with twin-screw extruder. Effects of nano SiO2on the reinforcing and toughening of PP were studied by analyzing the material impact broken fracture, the crystal structure and the diameter of SiO2nano particle using SEM, XRD and TEM, respectively. Results showed that the impact strength and the tensile strength of nano SiO2/PP composite material were improved apparently; the impact strength of PP was fracture was increased to 67% when the nano SiO2 content was 4%; while the nano SiO2 particle upon surface treatment will impose obvious heterogeneous nucleation function over PP crystal.展开更多
A tri-block copolymer coupling agent polystyrene-block-poly(n-butyl-acrylate)-block-poly(γ-methacryloxypropylt rimethoxysilane)(PS-b-PnBA-b-PMPS)was synthesizedby atom transfer radical polymerization(ATRP),and its mo...A tri-block copolymer coupling agent polystyrene-block-poly(n-butyl-acrylate)-block-poly(γ-methacryloxypropylt rimethoxysilane)(PS-b-PnBA-b-PMPS)was synthesizedby atom transfer radical polymerization(ATRP),and its molecular structure was characterized by fourier-transform infrared spectra,hydrogen nuclear magnetic resonance and gel permeation chromatography.The glass bead was treated with the block copolymer coupling agent,and then studied by transmission electron microscopy.The result showed that strong interaction was formed between the block copolymer coupling agent and the surface of glass bead,and then the block of poly(n-butylacrylate)formed a layer of film on the surface.展开更多
文摘SiO2 nano particle, through surface modification by silicane coupling agent KH-570, was successfully applied to make nano SiO2/PP composite material by the melt-out blending process with twin-screw extruder. Effects of nano SiO2on the reinforcing and toughening of PP were studied by analyzing the material impact broken fracture, the crystal structure and the diameter of SiO2nano particle using SEM, XRD and TEM, respectively. Results showed that the impact strength and the tensile strength of nano SiO2/PP composite material were improved apparently; the impact strength of PP was fracture was increased to 67% when the nano SiO2 content was 4%; while the nano SiO2 particle upon surface treatment will impose obvious heterogeneous nucleation function over PP crystal.
文摘A tri-block copolymer coupling agent polystyrene-block-poly(n-butyl-acrylate)-block-poly(γ-methacryloxypropylt rimethoxysilane)(PS-b-PnBA-b-PMPS)was synthesizedby atom transfer radical polymerization(ATRP),and its molecular structure was characterized by fourier-transform infrared spectra,hydrogen nuclear magnetic resonance and gel permeation chromatography.The glass bead was treated with the block copolymer coupling agent,and then studied by transmission electron microscopy.The result showed that strong interaction was formed between the block copolymer coupling agent and the surface of glass bead,and then the block of poly(n-butylacrylate)formed a layer of film on the surface.
