Polylactic acid/PC (polycarbonate) alloy containing biodegradable material and preparation method thereof

A biodegradable material and polycarbonate technology are applied in the field of biodegradable materials containing polylactic acid/polycarbonate (PC) alloy and their preparation, achieving the effects of fast biodegradation, low cost 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 polycarbonate 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 applicable to all types of films, sheets, pipes, etc. This type of alloy polymer material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh 10 kilograms of a mixture of 40% polycarbonate, 50% polylactic acid, and 10% ethylene-methyl acrylate-glycidyl methacrylate (E-MA-GMA) according to the weight ratio. Dry polylactic acid and polycarbonate for 1.5 hours first, then polycarbonate, ethylene-methyl acrylate-glycidyl methacrylate (E-MA-GMA), polylactic acid at a speed of 800 rpm The high-speed mixer is used for uniform mixing, and the mixed material is put into a twin-screw extruder to melt and extrude to 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

[0029] Weighing polycarbonate 45%, polylactic acid 42%, ethylene-methyl acrylate-glycidyl methacrylate (E-MA-GMA) 5% and ethylene-butyl acrylate (E-BA) 8% by weight % of the mixture 10 kg. Dry polylactic acid and polycarbonate for 1.5 hours first, then polycarbonate, ethylene-methyl acrylate-glycidyl methacrylate (E-MA-GMA), polylactic acid at a speed of 800 rpm The high-speed mixer is used for uniform mixing, and the mixed material is put into a twin-screw extruder to melt and extrude to 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-...

Embodiment 3

[0031] Weigh 55% polycarbonate, 30% polylactic acid, 5% styrene-acrylonitrile copolymer grafted maleic anhydride, 5% styrene-maleic anhydride random polymer (SMA), polylactic acid 10 kg of mixed material of grafted maleic anhydride (LAM) 3% and n-butyl titanate 2%. Dry polylactic acid and polycarbonate for 1.5 hours, then graft polycarbonate, styrene-acrylonitrile copolymer with maleic anhydride, styrene-maleic anhydride random polymer (SMA), polylactic acid Grafted maleic anhydride (LAM), n-butyl titanate, and polylactic acid were mixed evenly in a high-speed mixer with a rotation speed of 800 rpm, and the mixture was added to a twin-screw extruder to melt, extrude, and granulate. The 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 ...

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PUM

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Abstract

The invention relates to a PC (polycarbonate) and polylactic acid blend alloy containing biodegradable material and a preparation method thereof. Blend alloy is formed by mixing 30%-50% of polycarbonate, 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 polycarbonate for 1-2 hours; secondly, mixing the polycarbonate, 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 / polycarbonate blend alloy sheet product has good biodegradability, and environmental pollution caused by the polycarbonate 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. The invention relates to a method for preparing a polylactic acid / polycarbonate blended alloy biodegradable material by blending a biodegradable material polylactic acid and a non-biologically degradable material polycarbonate. 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 urgent technical problem to be solv...

Claims

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Application Information

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IPC IPC(8): C08L69/00C08L67/04C08L23/08C08L51/00C08L35/06C08L51/08B29B9/06
Inventor 不公告发明人
Owner 李博琪
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