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Heat-resistant polylactic acid composite material and preparation method thereof

A composite material, polylactic acid technology, applied in the field of polylactic acid material and its preparation, heat-resistant polylactic acid composite material and its preparation, can solve the problems of high cost, poor mechanical properties, etc., achieve low price, strong processing performance, heat The effect of short treatment time

Active Publication Date: 2009-12-16
ZHEJIANG HISUN BIOMATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the heat resistance of the polylactic acid composite material after heat treatment is significantly improved; but the filler material used is modified talcum powder, which has high cost and poor mechanical properties

Method used

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  • Heat-resistant polylactic acid composite material and preparation method thereof
  • Heat-resistant polylactic acid composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 99 parts of poly-L-lactic acid with low D (poly-D-lactic acid) content in vacuum drying, 1 part of nucleating agent zinc phenyl phosphite, 20 parts of inorganic filler talc powder with particle size of 1250 mesh-12500 mesh, and 10 parts of starch acetate , 20 parts of wood fiber, 0.1 part of silane coupling agent γ-(2,3-glycidoxy)propyltrimethoxysilane, 1 part of toughening modifier polycaprolactone, lubricant aluminum stearate 0.3 part The parts are melted and blended in a twin-screw extruder evenly and then extruded and pelletized. The temperature settings of each section of the screw are: 190°C, 200°C, 210°C, 220°C, 210°C, and the rotation speed is: 50rpm. After granulation, injection molding is carried out in an injection molding machine. The injection temperature is 210° C., the injection pressure is 100 MPa, and the residence time is about 40 seconds. The samples obtained by injection molding were heat-treated at a constant temperature of 80°C in an oven for 180 m...

Embodiment 2

[0031] 89 parts of poly-L-lactic acid with low D (poly-D-lactic acid) content in vacuum drying, 1 part of nucleating agent zinc phenylphosphinate, 10 parts of inorganic filler talc powder with particle size of 1250 mesh-12500 mesh, starch laurate 20 parts, bamboo fiber 10 parts, silane coupling agent γ-aminopropyltriethoxysilane 1 part, toughening modifier polybutene-adipic acid-terephthalic acid 5 parts, lubricant stearic acid 0.5 part of calcium was melted and blended uniformly in a twin-screw extruder, and then extruded and pelletized. The temperature settings of each section of the screw were: 180°C, 190°C, 200°C, 210°C, 200°C, and the rotation speed was 30rpm. After granulation, injection molding is carried out in an injection molding machine. The injection temperature is 180° C., the injection pressure is 80 MPa, and the residence time is about 40 seconds. The injection-molded samples were kept in an oven at 80°C for 30 minutes. Its mechanical properties and heat resist...

Embodiment 3

[0033] 69 parts of poly-L-lactic acid with low D (poly-D-lactic acid) content in vacuum drying, 1 part of nucleating agent zinc phenyl phosphate, 40 parts of inorganic filler calcium carbonate with particle size of 1250 mesh-12500 mesh, 30 parts of starch, flax fiber 5 parts, silane coupling agent γ-(2,3-glycidoxy)propyltrimethoxysilane 0.1 part, toughening modifier polycaprolactone 1 part, lubricant aluminum stearate 0.8 part The screw extruder is melted and blended evenly and then extruded and pelletized. The temperature settings of each section of the screw are: 160°C, 170°C, 180°C, 190°C, 180°C, and the rotation speed is 50 rpm. After granulation, injection molding was performed in an injection molding machine. The injection temperature was 210° C., the injection pressure was 90 MPa, and the residence time was about 45 seconds. The injection-molded samples were kept in an oven at 90°C for 30 minutes. Its mechanical properties and heat resistance are shown in Table 1.

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Abstract

The invention provides a heat-resistant polylactic acid composite material and a preparation method thereof, which belong to the technical field of polymer materials. The preparation method solves the technical problems of low product biodegradability, high cost, poor mechanical performance and the like of the prior method for preparing polylactic acid crosslinking materials and polymer crosslinking materials. The heat-resistant polylactic acid composite material comprises the following components in portion by weight: 50 to 99 portions of polylactic acid resin with an oligomerization-D lactic acid content, 0.1 to 15 portions of nucleating agent and 1 to 50 portions of starch or modified starch, wherein the content of a poly-D lactic acid in the poly-lactic acid resin with the oligomerization-D lactic acid content is less than 5 weight percent. The preparation method for the composite material comprises the following steps: a, mixing and pelleting; b, injection molding; and c, heat treatment. The composite material has the advantages of high mechanical and heat-resistant performance. The preparation method for the composite material is simple in technical process, high in processability and low in cost and can realize large-scale industrial production.

Description

technical field [0001] The invention relates to a polylactic acid material and a preparation method thereof, in particular to a heat-resistant polylactic acid composite material and a preparation method thereof, and belongs to the technical field of polymer materials. Background technique [0002] Resources and the environment are major problems faced by human beings to achieve sustainable development. With the continuous development of mineral resources such as petroleum, the global energy is gradually depleting. Negative effects such as "white pollution" have attracted widespread attention. [0003] In order to solve the problem of "white pollution" caused by waste plastics, many countries have proposed many practical solutions, among which the most effective and thorough way is to use biodegradable polymer materials instead of petroleum synthetic polymer materials. Compared to petroleum synthetic polymeric materials, biodegradable polymeric materials generate less heat w...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L3/02C08L3/04C08K13/04C08K7/02C08K3/34C08K3/26
Inventor 边新超刘炎龙梁伟陈学思陈志明王若松
Owner ZHEJIANG HISUN BIOMATERIALS
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