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Aliphatic polyester/starch/clay ternary degradable resin and production thereof

An aliphatic polyester, full-degradation technology, applied in the field of aliphatic polyester/starch/clay ternary full-degradable resin and its preparation, can solve the problems of complex process, general mechanical properties, limited application range, etc., and achieve the solution of white Pollution, improving mechanical properties, and meeting environmental protection requirements

Active Publication Date: 2005-12-28
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Publication No. 1354196A adopts reactive compatibilizer to improve the compatibility of starch and aliphatic polyester in the patent report, but it is necessary to prepare the compound of grafted monomer and acid anhydride and its derivatives earlier, the process is more complicated, and General mechanical properties, which limits its scope of application

Method used

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  • Aliphatic polyester/starch/clay ternary degradable resin and production thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 50 grams of corn starch, 15 grams of glycerin and 5 grams of urea were stirred in a high-speed mixer for 15 minutes, mixed evenly, and left for 1 day to pre-plasticize the mixture. Then mix with 50 grams of polylactic acid, 4 grams of montmorillonite, 1 gram of antioxidant phosphite tris (2,4-di-tert-butylphenyl) ester, 1 gram of stearic acid, 1 gram of epoxy resin After mixing, knead in a twin-screw extruder at a high temperature of 130-170°C, the screw speed is 250 rpm, and the material residence time is 4 minutes, extruding, granulating, and forming. The properties are shown in Table 1.

Embodiment 2

[0040] 30 grams of potato starch, 10 grams of polyethylene glycol and 1 gram of sodium hydroxide were stirred in a high-speed mixer for 15 minutes, mixed evenly, and left for 1 day to pre-plasticize the mixture. Then mix the mixture with 70 grams of polylactic acid, 10 grams of modified montmorillonite, 2 grams of antioxidant phosphite tris (2,4-di-tert-butylphenyl) ester, 1 gram of stearic acid, 1 gram of stearic acid Calcium fatty acid and 4 grams of epoxy resin are mixed and kneaded in a twin-screw extruder at 150-180°C at high temperature, the screw speed is 200 rpm, and the residence time of the material is 6 minutes. Extrude, granulate, and shape . The properties are shown in Table 1.

Embodiment 3

[0042] Mix and extrude 70 grams of polylactic acid, 30 grams of montmorillonite and 10 grams of polyethylene glycol in a twin-screw extruder at 150-170° C., and the screw speed is 130 rpm to obtain clay mineral raw materials. 50 grams of corn starch, 15 grams of glycerin and 1 gram of potassium hydroxide were stirred in a high-speed mixer for 15 minutes, mixed evenly, and placed for 1 day to pre-plasticize the mixture. Then with 40 gram polylactic acid, 20 gram clay mineral type raw materials, 1 gram antioxidant pentaerythritol bisphosphite bis (2,4-di-t-butylphenyl) ester, 1 gram calcium stearate, 3 After mixing 1 g of isocyanate, knead in a twin-screw extruder at 130-160°C at high temperature, the screw speed is 50 rpm, the residence time of the material is 10 minutes, extrude, granulate, and shape. The properties are shown in Table 1.

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PUM

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Abstract

A fat polyester / starch / clay ternary degradable resin and its production are disclosed. The resin consists of vegetable starch, fat polyester, clay mineral material, gel promoter, plasticizer, antioxiant, lubricant and compatibilizer. The process is carried out by weighing raw materials proportionally, mixing vegetable starch with plasticizer and gel promoter from high-speed mixer, stirring for 5-30mins, laying aside for 1-2 day, preplasticizing mixture, adding mixture, fat polyester, clay mineral material, antioxidant and lubricant into double-screw extruder, melting and mixing from double-screw extruder, reacting and extruding, and obtaining the product. It achieves simple process, good biological degradability and no environmental pollution.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to an aliphatic polyester / starch / clay ternary fully degradable resin and a preparation method thereof. Background technique [0002] Plastic has become the most widely used material in the world, and various plastic products have been involved in various fields of social production and life. However, the ensuing limited resources and environmental pollution have become two major problems in the plastics industry. In order to solve this problem, people have proposed the development and application of degradable plastics. [0003] The most reported degradable plastics are starch-based plastics. However, there is still a certain proportion of polyolefin plastics (polyethylene, polypropylene, polystyrene) in most products, which cannot be completely degraded after being discarded, and cannot solve the problem of white pollution, and its mechanical properties are ...

Claims

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Application Information

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IPC IPC(8): C08L3/02
Inventor 任杰李申任天斌
Owner TONGJI UNIV
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