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Polypropylene-nano particle compound material and preparation method thereof

A technology of nano-particles and composite materials, applied in the field of nano-modified polypropylene composite materials and its preparation, can solve the problems of reduced impact strength of composite materials, incompatibility of cost performance, and decreased material toughness, and achieve excellent processing performance and low cost. Low, force-enhanced effect

Inactive Publication Date: 2009-03-18
NINGBO UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limitations of the current dispersion means, when the content of inorganic nanoparticles is low, the inorganic nanoparticles have a certain toughening effect on polypropylene; when the content of inorganic nanoparticles is high, the agglomeration phenomenon between nanoparticles is intensified, and the aggregate Become a stress concentration point in the material, resulting in a decrease in the impact strength of the composite material and a decrease in the toughness of the material
CN1156530C discloses a kind of preparation method of high-toughness polypropylene composite material, it carries out electron beam irradiation to inorganic nano-particles and uses amine compound to graft and modify to form filler and then melt blends with maleic anhydride grafted polypropylene to make masterbatch, Finally, it is diluted and dispersed in polypropylene at a certain ratio to obtain high-toughness polypropylene nanocomposites. This method is complicated in process and high in manufacturing cost, which is not compatible with the cost performance of polypropylene

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The preparation method of polyisobutyl vinyl ether-maleic anhydride copolymer is as follows: add solid maleic anhydride monomer and initiator (AIBN) into the reaction kettle, vacuum exhaust, fill with purified nitrogen, and then inject Mixed solvent of ethyl acetate and cyclohexane, warming up to 40-80 0 C, dissolve the liquid vinyl ether monomer and initiator in a small amount of ethyl acetate, add it dropwise into the reaction kettle, react at constant temperature for 2-10 hours, then add petroleum ether, filter, dry, and pulverize to obtain White solid product polyisobutyl vinyl ether / maleic anhydride copolymer particles.

Embodiment 2

[0020] Dissolve 200 grams of polyisobutyl vinyl ether-maleic anhydride alternating copolymer with a weight-average molecular weight of 45,000 in 4,000 milliliters of water, add a hydrosol containing 1,100 grams of nano-silica, and ultrasonically disperse at 60°C for 2 hours , the water is evaporated to dryness to obtain 1300 grams of nanoparticles and polyisobutyl vinyl ether-maleic anhydride copolymer mixture; this mixture and 2500 grams of polypropylene, 8 grams of antioxidant 1010 are added to the twin-screw extruder In the machine, the barrel temperature is 160°C, the screw speed is 100rpm, and the blending time is 12min. After extrusion and granulation, 3880 grams of polypropylene-nanoparticles and polyisobutyl vinyl ether-maleic anhydride copolymer composite materials are obtained . The tensile strength of the obtained composite material is 33.48MP, the elongation at break is 372%, and the notched Izod impact strength is 37.68kJ / m 2 .

Embodiment 3

[0022] 200 grams of polyisobutyl vinyl ether-maleic anhydride alternating copolymer with a weight-average molecular weight of 23,000 were dissolved in 5,000 milliliters of water, and a hydrosol containing 2,100 grams of nano-calcium carbonate was added. After ultrasonic dispersion at 60°C for 2 hours, Water is evaporated to dryness to obtain 2300 gram nanoparticles and polyisobutyl vinyl ether-maleic anhydride copolymer compound; This compound and 7400 gram polypropylene, 32 gram antioxidant 1010, join twin-screw extruder In the process, the barrel temperature was 180°C, the screw speed was 100 rpm, and the blending time was 5 minutes. After extrusion and granulation, 9732 grams of polypropylene-nanoparticles and polyisobutyl vinyl ether-maleic anhydride copolymer composite materials were obtained. The tensile strength of the obtained composite material is 32.27MP, the elongation at break is 315%, and the notched Izod impact strength is 31.58kJ / m 2 .

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Abstract

The invention discloses a composite material which consists of polypropylene, nanometer particles and polyisobutyl vinyl ether-maleic anhydride and a preparation method thereof. Through the synergic action of the polyisobutyl vinyl ether-maleic anhydride copolymer and the nanometer particles in the material, the acting force between the polypropylene and the nanometer particles is enhanced, and cluster effect caused by hydrogen bonds among the nanometer particles is weakened, thereby, the nanometer particles can be scattered in the polypropylene evenly in the nanometer scale, and the obtained polypropylene-nanoparticle composite material has the advantages of good flexibility, high shock resistant strength and excellent processing property. The invention has the advantages of simple processing technique, high production efficiency and low cost.

Description

technical field [0001] The invention relates to the field of polymer composite material preparation, and relates to a nano-modified polypropylene composite material and a preparation method thereof. Background technique [0002] Polypropylene (PP) is widely used due to its low price, easy processing and molding, low density, chemical corrosion resistance and excellent physical and mechanical properties, and it has become the fastest growing general-purpose plastic. However, due to the presence of methyl groups, the flexibility of its molecular chains is reduced and its crystal grains are coarse, which makes polypropylene less flexible, which seriously limits its further wide application in various fields. Improving the toughness of polypropylene has always been an important topic of polypropylene modification. The usual modification method is to add elastomers inside the PP matrix, such as adding ethylene-propylene rubber (ERP), ethylene-propylene-diene terpolymer ( EPDM), ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L29/10C08L35/00C08K3/26C08K3/36C08K3/22C08K5/134B29B9/12B29C47/92B29C48/40B29C48/92
CPCB29C48/92B29C2948/92704B29C48/04B29C48/40B29C2948/92561B29C2948/9259B29C2948/92885B29C2948/92895
Inventor 王剑峰田军
Owner NINGBO UNIVERSITY OF TECHNOLOGY
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