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Method for preparing polymer composite material by expanded perlite

A composite material and an intumescent technology, which is applied in the field of intumescent perlite micropowder and the preparation of polymer composite materials, can solve problems such as difficulty in dispersing inorganic fillers, and achieve low price, improved thermal decomposition temperature and flame retardant performance, and good ore quality. Effect

Inactive Publication Date: 2014-12-10
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention mainly solves the defects of traditional inorganic fillers in flame retardancy, provides a method for preparing expanded perlite polymer composite materials, and forms polymer composite materials with good flame retardancy and heat insulation properties; overcomes the existing Disadvantages of difficulty in dispersing inorganic fillers, and fillers are cheap and easy to obtain, non-toxic and environmentally friendly, and no dust pollution

Method used

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  • Method for preparing polymer composite material by expanded perlite
  • Method for preparing polymer composite material by expanded perlite
  • Method for preparing polymer composite material by expanded perlite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Sieve and grind the expanded perlite. Dry in an oven at 80°C for 5 hours.

[0020] (2) Weigh 5g of expanded perlite micropowder and 95g of polypropylene resin, and carry out melt blending with a twin-screw extruder after uniform mixing.

[0021] (3) Processing the mixture obtained in the step (2) through an injection molding machine, and injection molding to obtain a polypropylene expanded perlite composite material product.

[0022] The obtained composite material is observed by transmission electron microscope and scanning electron microscope, and it is found that the expanded perlite micropowder is evenly dispersed in the polypropylene matrix, indicating that the expanded perlite / polymer composite material has been prepared.

[0023] Table 1 Effect of expanded perlite on flame retardant properties of polypropylene

[0024]

[0025] It can be seen from Table 1 that the oxygen index of the expanded perlite / polypropylene (20 / 80) sample is 8.9% higher than that ...

Embodiment 2

[0027] (1) Sieve and grind the expanded perlite. Dry in an oven at 60°C for 4 hours.

[0028] (2) Weigh 60g of expanded perlite micropowder and 60g of ethylene-vinyl acetate copolymer, knead with a double-roller mill, add 2g of calcium stearate, and mix at about 80°C to obtain expanded perlite / ethylene-vinyl acetate Copolymer composites.

[0029] The obtained composite material is observed by transmission electron microscope and scanning electron microscope, and it is found that the expanded perlite micropowder has been uniformly dispersed in the ethylene-vinyl acetate copolymer matrix, indicating that the expanded perlite / ethylene-vinyl acetate copolymer composite material has been prepared.

[0030] Table 2 has listed the impact of expanded perlite on the flame retardancy of ethylene-vinyl acetate copolymer, as can be seen from the table: the oxygen index of expanded perlite / ethylene-vinyl acetate copolymer (60 / 60) is compared Because the pure ethylene-vinyl acetate copoly...

Embodiment 3

[0035] (1) Sieve and grind the expanded perlite. Dry in an oven at 60°C for 6 hours.

[0036] (2) Take by weighing 45g expanded perlite micropowder, 55g polylactic acid resin, carry out melt blending with twin-screw extruder after uniform mixing.

[0037] (3) Processing the mixture obtained in the step (2) through an injection molding machine, and injection molding to obtain a polylactic acid expanded perlite composite material product.

[0038] The obtained composite material was observed by transmission electron microscope and scanning electron microscope, and it was found that the expanded perlite micropowder was uniformly dispersed in the polylactic acid matrix, indicating that the expanded perlite / polymer composite material had been prepared.

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Abstract

The invention relates to a method for preparing a polymer composite material by expanded perlite. The method comprises the following steps: mixing the expanded perlite and a polymer in a weight ratio of (2-60) to (98-60) to uniformly disperse the expanded perlite in the polymer matrix; and molding to obtain a polymer composite material product, wherein the expanded perlite is a product formed by carrying out high-temperature expansion on natural mineral perlite, and a honeycomb porous structure is formed inside the expanded perlite; and the polymer is one or more of universal plastic, engineering plastic and rubber. The polymer composite material has excellent heat-insulation and flame-retardant performances, is capable of overcoming the defect that the flame-retardant performance cannot be remarkably improved by existing clay type additives, is environmental-friendly and non-toxic, and does not cause dust pollution; and the packing is low in cost and easily available.

Description

technical field [0001] The invention relates to the technical field of polymer composite materials, in particular to a method for preparing expanded perlite micropowder for polymer composite materials. Background technique [0002] Adding inorganic fillers to polymers is an important means to improve the properties of polymers. Due to the dimensional stability of fillers, in filled polymers, the movement of molecular chains in the interfacial region of the polymers is restricted, the heat distortion temperature increases, and thermal stability The performance is improved, the heat conduction in the combustion process is delayed, and the heat release rate of the polymer is significantly reduced, and the cheap filler can also reduce the cost of the polymer and improve its market competitiveness. [0003] The expanded perlite micropowder used in this experiment has a particle size of micron or nanometer, is uniformly dispersed in the polymer, is not easy to agglomerate, and is ...

Claims

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Application Information

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IPC IPC(8): C08K7/26C08L23/06C08L23/08C08L23/12C08L23/20C08L27/06C08L25/06C08L55/02C08L33/12C08L61/06C08L61/20C08L63/00C08L67/06C08L75/04C08L77/00C08L25/00C08L69/00C08L71/12C08L27/18C08L27/12C08L79/08C08L81/02C08L7/00C08L9/06C08L9/00C08L23/16C08L23/22C08L9/02
Inventor 张胜陈宸谷晓昱
Owner BEIJING UNIV OF CHEM TECH
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