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

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

Example Embodiment

[0018] Example 1

[0019] (1) The expanded perlite is sieved and ground. Dry in an oven at 80°C for 5h.

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

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

[0022] 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 polypropylene matrix, indicating that the expanded perlite / polymer composite material had been prepared.

[0023] Table 1 Influence 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 increased ...

Example Embodiment

[0026] Example 2

[0027] (1) The expanded perlite is sieved and ground. Dry in an oven at 60°C for 4h.

[0028] (2) Weigh 60g expanded perlite micropowder, 60g ethylene-vinyl acetate copolymer, knead with a twin-roll mill, add 2g 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 lists the effect of expanded perlite on the flame retardant properties of ethylene-vinyl acetate copolymer. It can be seen from the table: the oxygen index of expanded perlite / ethylene-vinyl acetate copolymer (60 / 60) is compared The pure ethylene-vinyl acetate copol...

Example Embodiment

[0034] Example 3

[0035] (1) The expanded perlite is sieved and ground. Dry in an oven at 60°C for 6h.

[0036] (2) Weigh 45 g of expanded perlite micropowder and 55 g of polylactic acid resin, and after uniform mixing, use a twin-screw extruder for melt blending.

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

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