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

Inactive Publication Date: 2011-09-14
SICHUAN CHANGHONG ELECTRIC CO LTD +1
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  • Abstract
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  • Application Information

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Problems solved by technology

However, because the matrix resin of traditional glass fiber reinforced polypropylene generally adopts homopolypropylene (Liu Xue, Zhuang Hui, Cheng Yongfeng, Research on the performance of long glass fiber reinforced PET engineering plastics. Plastic Industry, 2006, 34 (12): 26-28; Thomasset J, Carreau P J, Sanschagrin B, et al. Rheologleal properties of long glass fiberfilled polypropylene. JNon-Newtonian Fluid Mech, 2005, 125: 25-34; Wang Hongzeng, Li Rongxun, Liu Baocheng,. Reinforced polypropylene automotive engine fan Development of modified materials, Plastic Science and Technology, 2005(6): 32-35; Zhang Ning, Li Zhongheng, Tao Yu, Research on long glass fiber reinforced polypropylene composite materials, Plastic Industry, 2006, 34(12): 29- 32; etc.), so that the prepared glass fiber reinforced polypropylene material still has certain performance defects:
[0004] 1) Due to the low notched impact strength of the homopolypropylene used, it is only ~5kJ / m 2 , although the impact strength has been improved after adding glass fiber, the toughness of the material, especially the notched impact strength and elongation at break, is very limited, and it still cannot meet the requirements of some functional structural components.
[0005] 2) Due to the high viscosity of glass fiber reinforced polypropylene melt, especially when the glass fiber content is high, the fluidity is poor and it is not easy to injection molding
[0006] 3) Due to the poor compatibility between the added glass fiber and homopolypropylene, glass fiber often floats on the surface of the product in the prepared glass fiber reinforced polypropylene product, causing the "floating fiber phenomenon" and seriously affecting the product. Exterior

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  • Glass fiber reinforced co-polypropylene composite material and preparation method of the Glass fiber reinforced co-polypropylene composite material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The notched impact strength of 50 parts of the Izod beam is 50kJ / m 2 1. Block copolymer polypropylene with a melt index of 5g / 10min, 10 parts of polypropylene grafted with maleic anhydride with a graft rate of 0.5%, 2 parts of homopolypropylene with a melt index of 2g / 10min, 0.01 part of diperoxide Cumene, 0.1 part of antioxidant 1010 are mixed evenly together, and the mixed material is added into the twin-screw extruder from the feed port, and 40 parts of surface-treated silane are added from the entrance of the glass fiber above the barrel wall of the screw melting section. Coupling agent-treated glass fiber plied rovings with a single filament diameter of 6 μm are melt-extruded and pelletized at 170-220°C to obtain high-performance glass fiber-reinforced block copolymerized polypropylene composites. After testing, the melt index (200°C, load 2.26Kg) of the material is 35g / 10min, the tensile strength is 89MPa, the elongation at break is 9%, the Young's modulus is 5.3G...

Embodiment 2

[0037]The notched impact strength of 80 parts of the Izod beam is 80kJ / m 2 , a random copolymer polypropylene with a melt index of 0.3g / 10min, 5 parts of polypropylene grafted maleic anhydride with a graft rate of 1%, 5 parts of homopolypropylene with a melt index of 10g / 10min, 0.1 part of peroxidized Benzoyl, 0.05 parts of antioxidant 168 are mixed together evenly, and the mixed material is added into the twin-screw extruder from the feeding port, and 10 parts of surface-treated silane are added from the entrance of the glass fiber above the barrel wall of the screw melting section. Coupling agent-treated glass fiber plied rovings with a single filament diameter of 17 μm are melt-extruded and pelletized at 170-220 ° C to obtain high-performance glass fiber-reinforced block copolymerized polypropylene composites. After testing, the melt index (200°C, load 2.26Kg) of the material is 21g / 10min, the tensile strength is 49MPa, the elongation at break is 35%, the Young's modulus is...

Embodiment 3

[0039] The notched impact strength of 60 parts of the Izod beam is 60kJ / m 2 , a random copolymer polypropylene with a melt index of 3g / 10min, 7 parts of polypropylene grafted maleic anhydride with a graft rate of 0.8%, 8 parts of homopolypropylene with a melt index of 8g / 10min, 0.05 part of benzene peroxide Formyl, 0.1 part of antioxidant 168 mixed with antioxidant 1010 in a ratio of 1:1 is mixed evenly, and the mixed material is added to the twin-screw extruder from the feed port, and at the same time, it is removed from the barrel wall of the screw melting section Add 20 parts of glass fiber plied rovings with silane coupling agent on the surface and a single filament diameter of 10 μm to the entrance of the upper glass fiber, and melt and extrude at 170-220 ° C to obtain high-performance glass fiber reinforcement. Block copolymer polypropylene composites. After testing, the melt index (200°C, load 2.26Kg) of the material is 18g / 10min, the tensile strength is 63MPa, the elo...

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Abstract

The invention discloses a glass fiber reinforced co-polypropylene composite material and a preparation method of the glass fiber reinforced co-polypropylene composite material. The preparation method includes the steps as follows: uniformly mixing co-polypropylene, polypropylene grafted with maleic anhydride, homopolymerized polypropylene organic peroxide initiator, and antioxidant in proportion;adding the mixture in a double-screw extruder and simultaneously adding glass fiber strand roving; and conducting melt extrusion for granulation at the temperature of 170-220 DEG C, thus obtaining the glass fiber reinforced co-polypropylene composite material, wherein the melt index of the obtained composite material is 18-35g / 10min, the tensile strength is 49-89 Mpa, the breaking elongation is 9-35%, the Young modulus is 2.3-5.3GPa and the notch impact strength is 10-33kJ / m2. The glass fiber reinforced co-polypropylene composite material provided by the invention has not only outstanding strength, modulus, and impact resisting and heat resisting properties, but also excellent processing flow property, and can injection-mold and form thin-wall products with attractive appearance and complex shape; and the glass fiber reinforced co-polypropylene composite material has the characteristics of being light in weight and cheap in cost can substitute for engineering plastics such as expensive ABS (Acrylonitrile Butadiene Styrene) and nylon.

Description

technical field [0001] The invention belongs to the technical field of glass fiber reinforced polypropylene (PP / GF) composite material and its preparation, and in particular relates to a glass fiber reinforced copolymerized polypropylene composite material with high strength, high modulus, high toughness and excellent processability and its preparation method. Background technique [0002] Polypropylene has rich raw materials, simple synthesis process, low price, good overall performance of resin, and wide range of uses. It is a very important general-purpose plastic. However, polypropylene has poor low-temperature toughness, strong notch sensitivity, and low mechanical properties, which also limit its application on functional structural parts (Wang Duoren, Synthetic Resin and Engineering Plastics Production Technology, Beijing, China Light Industry Press, 2001, 8). [0003] Although glass fiber reinforced polypropylene greatly improves the tensile strength, modulus and h...

Claims

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Application Information

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IPC IPC(8): C08L23/16C08L53/00C08L51/06C08L23/12C08K13/06C08K9/06C08K7/14C08K5/14B29B9/06B29C47/92B29C48/92
CPCB29C48/04B29C48/40B29C48/92B29C2948/92704B29C2948/92895B29C2948/92923
Inventor 白时兵潘晓勇王琪李斌胡帅领杜江伟
Owner SICHUAN CHANGHONG ELECTRIC CO LTD
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