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Polylactic acid/random copolymerization polypropylene alloy biodegradable material and preparation method thereof

A biodegradable material and random copolymerization technology, applied in the field of polylactic acid/random copolymer polypropylene alloy biodegradable material and its preparation, can solve problems such as white pollution, achieve fast biodegradation, low cost and improved applicability Effect

Inactive Publication Date: 2017-03-22
李博琪
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Provide a biodegradable material containing random copolymerized polypropylene and polylactic acid and its preparation method to solve the problem of biodegradation of non-degradable plastics, thereby solving the white pollution caused by plastics to the environment. The invention is suitable for films, sheets, pipes, etc. All types of such alloy polymer materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh 10 kilograms of a mixture of 10% random copolymerized polypropylene, 85% polylactic acid, and 5% SEBS-g-MA according to the proportion. Dry the polylactic acid for 1.5 hours first, then blend the random copolymerized polypropylene and SEBS-g-MA uniformly in a high-speed mixer with a rotation speed of 800 rpm, and put the mixed material into a twin-screw extruder to melt Extrusion granulation, the extrusion temperature is 190-210°C. The extruded material is dried and mixed with polylactic acid again in a high-speed mixer with a rotation speed of 800 rpm, and then added to a twin-screw extruder to melt and extrude to pelletize. The extrusion temperature is 190-220°C. The re-extruded material is dried and then added to an injection molding machine for injection molding into a sheet. Then the natural degradation experiment was carried out. The natural degradation experiment was carried out in accordance with the provisions of the national standard GB / T20197-2006. T...

Embodiment 2

[0029] Weigh 10 kg of a mixture of 15% random copolymerized polypropylene, 78% polylactic acid, SEBS-g-MA and maleic anhydride grafted polypropylene in proportion to 7%. Dry the polylactic acid for 1.5 hours first, then mix the random copolymerized polypropylene, SEBS-g-MA and maleic anhydride grafted polypropylene in a high-speed mixer with a rotation speed of 800 rpm, and mix the mixed materials Add it into a twin-screw extruder for melt extrusion and granulation, and the extrusion temperature is 190-210°C. The extruded material is dried and mixed with polylactic acid again in a high-speed mixer with a rotation speed of 800 rpm, and then added to a twin-screw extruder to melt and extrude to pelletize. The extrusion temperature is 190-220°C. The re-extruded material is dried and then added to an injection molding machine for injection molding into a sheet. Then the natural degradation experiment was carried out. The natural degradation experiment was carried out in accordan...

Embodiment 3

[0031] Weigh 10 kg of a mixture of 30% random copolymerized polypropylene, 55% polylactic acid, SEBS-g-MA and maleic anhydride grafted polypropylene in proportion to 15%. Dry the polylactic acid for 1.5 hours first, then mix the random copolymerized polypropylene, SEBS-g-MA and maleic anhydride grafted polypropylene in a high-speed mixer with a rotation speed of 800 rpm, and mix the mixed materials Add it into a twin-screw extruder for melt extrusion and granulation, and the extrusion temperature is 190-210°C. The extruded material is dried and mixed with polylactic acid again in a high-speed mixer with a rotation speed of 800 rpm, and then added to a twin-screw extruder to melt and extrude to pelletize. The extrusion temperature is 190-220°C. The re-extruded material is dried and then added to an injection molding machine for injection molding into a sheet. Then the natural degradation experiment was carried out. The natural degradation experiment was carried out in accorda...

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Abstract

The invention relates to a random copolymerization PP (Polypropylene) / polylactic acid blend alloy biodegradable material and a preparation method of the biodegradable material. A blend is prepared from the following components by weight: 10 percent to 30 percent of random copolymerization PP, 50 percent to 90 percent of polylactic acid and 5 percent to 15 percent of a compatilizer. The preparation method of the biodegradable material comprises the following steps: carrying out drying treatment on the polylactic acid for 1 hour to 2 hours; uniformly blending the random copolymerization PP and the compatilizer into a high-speed mixer at a rotary speed of 800rpm to 1500rpm; melting, blending and granulating the mixed blend through adopting a double-screw extruder and controlling the temperature to be 190 DEG C to 210 DEG C; after drying grains, mixing the grains with the polylactic acid again at a high speed; extruding and granulating; then carrying out injection molding to process the grains into sheet-shaped products. A polylactic acid / random copolymerization PP blend alloy sheet material product prepared by the method has relatively good biodegradability, and pollution to environments, caused by a non-degradable plastic component, namely the random copolymerization PP, is avoided.

Description

technical field [0001] The invention aims to improve or solve the technical problem of biodegradation performance of non-biodegradable polymer materials. The invention relates to a method for preparing a polylactic acid / random copolymerized polypropylene blended alloy biodegradable material by blending a biodegradable material polylactic acid and a non-biodegradable material random copolymerized polypropylene. Background technique [0002] The application range and amount of polymer materials are increasing rapidly, but most polymer materials degrade very slowly in nature after they are discarded, seriously polluting the environment. In recent years, the white pollution caused by waste plastics that are difficult to degrade has become more and more serious, which has attracted widespread attention from all over the world, and some protective and restrictive measures have been adopted. regulations. Therefore, the development of degradable polymer materials has become an urg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L23/14C08L51/00C08L51/06
Inventor 不公告发明人
Owner 李博琪
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