Glass fiber reinforced co-polypropylene composite material and preparation method of the Glass fiber reinforced co-polypropylene composite material
A technology of copolymerized polypropylene and composite materials, which is applied in the field of glass fiber reinforced polypropylene copolymer and its preparation, can solve the problems of high melt viscosity, poor fluidity, and difficulty in injection molding of glass fiber reinforced polypropylene, and achieves high tensile strength. Tensile yield strength and impact resistance, improved processing fluidity, and the effect of excellent toughness
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[0034] Example 1
[0035] The 50 parts cantilever beam notched impact strength is 50kJ / m 2 , Block copolymer polypropylene with a melt index of 5g / 10min, 10 parts of polypropylene grafted with maleic anhydride with a grafting rate of 0.5%, 2 parts of homopolypropylene with a melt index of 2g / 10min, 0.01 part of two peroxide Cumene, 0.1 part of antioxidant 1010 are mixed together uniformly, the mixed material is added to the twin-screw extruder from the feeding port, and 40 parts of surface silane are added from the glass fiber inlet above the barrel wall of the screw melting section. The glass fiber stranded untwisted roving with a single filament diameter of 6μm treated with coupling agent can be melted and extruded at 170~220℃ to obtain high-performance glass fiber reinforced block copolymer polypropylene composite material. After testing, the material has a melt index (200°C, load 2.26Kg) of 35g / 10min, tensile strength of 89MPa, elongation at break 9%, Young's modulus of 5.3GP...
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[0036] Example 2
[0037] The notched impact strength of 80 cantilever beams is 80kJ / m 2 , Random copolymer polypropylene with a melt index of 0.3g / 10min, 5 parts of polypropylene grafted with maleic anhydride with a grafting rate of 1%, 5 parts of homopolypropylene with a melt index of 10g / 10min, 0.1 part of peroxide Benzoyl, 0.05 parts of antioxidant 168 are mixed together uniformly, the mixed materials are added to the twin-screw extruder from the feeding port, and 10 parts of surface silane are added from the glass fiber inlet above the barrel wall of the screw melting section The glass fiber stranded untwisted roving with a single filament diameter of 17μm treated with coupling agent can be melted and extruded at 170~220℃ to obtain high-performance glass fiber reinforced block copolymer polypropylene composite material. After testing, the material has a melt index (200°C, load 2.26Kg) of 21g / 10min, tensile strength of 49MPa, elongation at break 35%, Young's modulus of 2.3GPa...
Example Embodiment
[0038] Example 3
[0039] The 60 parts cantilever beam notched impact strength is 60kJ / m 2 , Random copolymer polypropylene with a melt index of 3g / 10min, 7 parts of polypropylene grafted with maleic anhydride with a grafting rate of 0.8%, 8 parts of homopolypropylene with a melt index of 8g / 10min, 0.05 parts of benzene peroxide Formyl, 0.1 parts of antioxidant 168 mixed in a ratio of 1:1 and antioxidant 1010 are mixed uniformly, and the mixed materials are fed into the twin-screw extruder from the feeding port, and at the same time from the barrel wall of the screw melting section Add 20 parts of glass fiber stranded untwisted roving whose surface is treated with silane coupling agent and the monofilament diameter is 10μm at the upper glass fiber entrance, and melt-extrusion and pelletize at 170~220℃ to obtain high-performance glass fiber reinforcement Block copolymer polypropylene composite material. After testing, the material's melt index (200°C, load 2.26Kg) is 18g / 10min, t...
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