Production method of high-toughness PLA composite material
A composite material and high toughness technology, applied in the field of PLA bioplastics, can solve the problems of poor interfacial adhesion, low impact toughness and poor heat resistance of composite materials
Inactive Publication Date: 2016-06-08
HEILONGJIANG XINDA ENTERPRISE GRP
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Problems solved by technology
It has a wide range of uses in packaging and biomedicine, but due to its brittleness, poor heat resistance, and difficulty in controlling the degradation rate, the use effect is limited, so it needs to be modified.
PC is amorphous, with excellent overall performance, but poor processing fluidity; PLA has good processing fluidity, but low heat distortion temperature, and the blending of the two can make up for each other's shortcomings
PLA and PC are two partially compatible materials, only blending PLA and PC will lead to severe phase separation, poor interphase cohesion, resulting in low impact toughness of the composite material
Method used
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[0010] Unless otherwise specified, various raw materials of the present invention can be obtained commercially; or prepared according to conventional methods in the art. Unless otherwise defined or stated. All professional and scientific terms used herein have the same meanings as those familiar to those skilled in the art. In addition, any methods and materials similar or equivalent to those described can also be applied in the present invention.
[0011] Below in conjunction with specific embodiment, further illustrate the present invention. These examples are only for illustrating the present invention and are not intended to limit the scope of the present invention. The implementation methods that do not indicate specific conditions in the following examples are usually carried out according to conventional conditions, or according to the conditions suggested by the manufacturer. Unless otherwise indicated, all parts are parts by weight, all percentages are percentages ...
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The invention relates to a production method of a high-toughness PLA composite material; a toughening agent is co-mixed with PLA / PC by a melt extrusion method, and the high-toughness PLA composite material with high material utilization rate is formed; the material comprises the raw materials in parts by weight: 30 parts of polylactic acid, 70 parts of polycarbonate, and 0-12 parts of a compatilizer. The production method comprises the steps of co-mixing the compatilizer with PC / PLA through the melt extrusion method, then transmitting the extrusion material strip through a conveyor belt, carrying out air cool cutting, carrying out grain-sized dicing, and packaging. The high-toughness and biodegradable PLA composite material can be directly extruded; and the production method has simple production process, has no pollution to environment, and can effectively alleviate environmental problems and energy crisis.
Description
technical field [0001] The invention belongs to the field of PLA biological plastics, and relates to a PLA / PC blended composite material reinforced with a toughening agent. Background technique [0002] As a fully degradable biomaterial, polylactic acid has been favored by the polymer industry in recent years. It has a wide range of uses in packaging and biomedicine, but due to its brittleness, poor heat resistance, and difficulty in controlling the degradation rate, the use effect is limited, so it needs to be modified. PC is amorphous, with excellent overall performance, but poor processing fluidity; PLA has good processing fluidity, but low heat distortion temperature, and the blending of the two can make up for each other's shortcomings. PLA and PC are two partially compatible materials. Only blending PLA and PC will lead to severe phase separation and poor interfacial adhesion, resulting in low impact toughness of the composite. Therefore, it is necessary to carry out...
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IPC IPC(8): C08L69/00C08L67/04C08L23/08C08L51/00
Inventor 孟庆强陈志刚马俊杰
Owner HEILONGJIANG XINDA ENTERPRISE GRP