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Polylactic acid/PET (polyethylene terephthalate) alloy containing biodegradable material and preparation method thereof

A technology of polyethylene terephthalate and polyethylene terephthalate, applied in the field of biodegradable materials containing polylactic acid/polyethylene terephthalate (PET) alloy and its preparation, can Solve the problems of white pollution and achieve the effect of fast biodegradation, huge demand and broad market prospects

Inactive Publication Date: 2017-03-15
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 polyethylene terephthalate and polylactic acid and its preparation method, 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 All types of alloy polymer materials such as materials, pipes, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Weigh 10 kg of a mixture of 40% polyethylene terephthalate, 50% polylactic acid, and 10% tetrabutyl titanate [Ti(OBu)4] according to the weight ratio. Dry polylactic acid and polyethylene terephthalate for 1.5 hours first, and then dry polyethylene terephthalate, tetrabutyl titanate [Ti(OBu)4], and polylactic acid at a rotating speed of It is mixed uniformly in a high-speed mixer at 800 rev / min, and the mixed material is put into a twin-screw extruder to melt, extrude and granulate, and the extrusion temperature is 190-220°C. Dry the extrudate. Add it again to a twin-screw extruder for melt extrusion and granulation, and the extrusion temperature should be 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. The ...

Embodiment 2

[0030] Take 10 kg of a mixture of 50% polyethylene terephthalate, 42% polylactic acid, and 8% tetrabutyl titanate [Ti(OBu) 4 ] according to weight ratio. Dry polylactic acid and polyethylene terephthalate for 1.5 hours first, and then dry polyethylene terephthalate, tetrabutyl titanate [Ti(OBu)4], and polylactic acid at a rotating speed of It is mixed uniformly in a high-speed mixer at 800 rev / min, and the mixed material is put into a twin-screw extruder to melt, extrude and granulate, and the extrusion temperature is 190-220°C. Dry the extrudate. Add it again to a twin-screw extruder for melt extrusion and granulation, and the extrusion temperature should be 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. The test...

Embodiment 3

[0032] Weigh polyethylene terephthalate 60%, polylactic acid 30%, tetrabutyl titanate [Ti(OBu) 4] 5%, ethylene-n-butyl acrylate-methacrylic acid shrinkage 10 kilograms of mixture of glyceride copolymer (PTW) 5%. Dry polylactic acid and polyethylene terephthalate for 1.5 hours first, and then dry polyethylene terephthalate, tetrabutyl titanate [Ti(OBu)4], ethylene-n-butyl Acrylic acid ester-glycidyl methacrylate copolymer (PTW) and polylactic acid were mixed evenly in a high-speed mixer with a rotation speed of 800 rpm, and the mixed material was added to a twin-screw extruder to melt and extrude to pelletize. The outlet temperature is 190-220°C. Dry the extrudate. Add it again to a twin-screw extruder for melt extrusion and granulation, and the extrusion temperature should be 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 de...

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PUM

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Abstract

The invention relates to a PET (polyethylene terephthalate) and polylactic acid blend alloy containing biodegradable material and a preparation method thereof. Blend alloy is formed by mixing 30%-60% of polyethylene terephthalate, 30%-50% of polylactic acid and 5%-10% of compatilizers in weight proportion. The preparation method includes the steps: firstly, drying the polylactic acid and the polyethylene terephthalate for 1-2 hours; secondly, mixing the polyethylene terephthalate, the polylactic acid and the compatilizers at a high speed, and extruding, granulating and drying the mixture by a double-screw extruder; thirdly, extruding, granulating and drying the mixture again. The extruding and granulating temperature is controlled to range from 190 DEG C to 220 DEG C. Dried materials are subjected to injection molding to form a sheet product. The prepared polylactic acid / polyethylene terephthalate blend alloy sheet product has good biodegradability, and environmental pollution caused by the polyethylene terephthalate serving as a non-degradable plastic component is avoided.

Description

technical field [0001] The invention aims to improve or solve the technical problem of biodegradation performance of non-biodegradable polymer materials. [0002] It involves the preparation of polylactic acid / polyethylene terephthalate (PET) co- Method for hybrid gold biodegradable materials. Background technique [0003] 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 urgent technical problem to be solved. [0004] At present, there are not many types and amounts of degradable polymer m...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L67/04C08L23/08C08K5/10
Inventor 不公告发明人
Owner 李博琪
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