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Degradable polymer/natural mineal filler composite material and preparation method thereof

A technology of natural minerals and composite materials, applied in the field of degradable polymer composite materials and its preparation, can solve the problems of non-degradable, expensive, white pollution, etc.

Inactive Publication Date: 2003-06-11
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

General inorganic mineral fillers are substances that are thermally stable at medium and low temperatures, and are stable in ordinary plastic composite materials. The composite materials of inorganic mineral fillers / ordinary plastics cannot be degraded completely under natural conditions, and there is serious "white pollution"
There are not many degradable polymer materials that have been developed so far, such as polylactic acid, polycaprolactone, polyhydroxybutyrate, etc., but the price is expensive, which is 5 to 8 times that of ordinary plastics.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-4

[0011] 400 mesh calcium carbonate and polymethyl ethylene carbonate are melted and blended to prepare a degradable composite material at 180°C at a mixing speed of 35-180rrpm and a mixing time of 5 minutes in a melt mixing equipment. The material was compressed with a flat vulcanizer, and the mechanical properties were tested according to the ISO 527-2 standard. The composition and properties of the composite material are shown in Table 1. It can be seen from Table 1 that the strength and modulus of the calcium carbonate reinforced material are greatly improved compared to the base material.

Embodiment 5

[0013] The 1250 mesh calcium carbonate and polymethyl ethylene carbonate are melted and blended to prepare a degradable composite material at 180°C at a mixing speed of 35-180rrpm and a mixing time of 5 minutes in a melt mixing equipment. The material was compressed with a flat vulcanizer, and the mechanical properties were tested according to the ISO 527-2 standard. The composition and properties of the composite material are shown in Table 1. It can be seen from Table 1 that the strength and modulus of the calcium carbonate reinforced material are greatly improved compared to the base material.

Embodiment 6-8

[0015] The nanometer calcium carbonate and polymethyl ethylene carbonate are melted and blended to prepare a degradable composite material in a melt mixing equipment at 180°C, a mixing speed of 35-180 rrpm, and a mixing time of 5 minutes. The material was compressed with a flat vulcanizer, and the mechanical properties were tested according to the ISO 527-2 standard. The composition and properties of the composite material are shown in Table 1. It can be seen from Table 1 that the strength and modulus of the calcium carbonate reinforced material are improved to a certain extent compared with the base material. As the shear rate increases, the performance of the composite material becomes worse.

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PUM

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Abstract

The invention belongs to a composite material of degradable poly-methyl ethyl carbonic acid resin / natural mineral filling and the preparing method. It adopts the natural mineral as the filling, andthe carbonic acid resin as the basic body, smelts and commixes the filling and the basic body on the existent / nonexistent condition of the coupling agent to make the composite material. The weight percent content of the filling is 5-80%, the better filling 10-40%, and the basic-body material is heat-degraded to obtain the methyl ring carbonic-acid ethyl ester which can be used as organic agent.

Description

Technical field [0001] The invention relates to a degradable polymer composite material reinforced by natural mineral fillers and a preparation method thereof. Background technique [0002] Filler is one of the important additives of plastic composite materials. It can reduce costs while improving certain physical or chemical properties. There are many types of fillers, which can be fundamentally divided into two categories: inorganic fillers and organic fillers. Due to the difference in composition and structure, inorganic fillers have different physical and chemical properties, and thus have different filling effects. General inorganic mineral fillers are materials that are thermally stable at medium and low temperatures, which are stable in ordinary plastic composite materials. Inorganic mineral filler / ordinary plastic composite materials cannot be completely degraded under natural conditions, and there is serious "white pollution" . There are not m...

Claims

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Application Information

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IPC IPC(8): C08K3/00C08L69/00
Inventor 孟跃中李秀华王拴紧诸泉肖敏
Owner SUN YAT SEN UNIV
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