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Biodegradable toughened heat-resistant polylactic acid modified resin and preparation method thereof

A modified resin and biodegradable technology, applied in the field of biodegradable toughened heat-resistant polylactic acid modified resin and its preparation, can solve the problems of unsatisfactory starch processing performance and achieve good processing performance and complete biodegradability Sexual, cost-effective, and easy to promote and apply

Inactive Publication Date: 2017-09-12
HEILONGJIANG XINDA ENTERPRISE GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are a large number of hydroxyl groups in the starch molecular chain, so that a large number of hydrogen bonds are formed between the molecules and within the molecule, which makes the processing performance of the starch unsatisfactory, and it is often necessary to use molecular modification to make it have a certain degree of plasticity.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) A biodegradable toughened heat-resistant polylactic acid modified resin, which contains the following raw materials in terms of mass percentage: 70% DL-lactic acid (viscosity average molecular weight is 100,000), 15% thermoplastic starch, 10% % ramie fiber, 2% stearic acid, 2% gamma-glycidyl etheroxypropyl trimethoxysilane and 1% antioxidant 1010;

[0026] (2) Dry each raw material at 80°C for 12 hours, then add it to a high-speed mixer at 800r / min and blend for 20 minutes according to the above mass percentage, and add the obtained mixture to a twin-screw extruder at a temperature of 170°C, feed the screw The speed is 20rpm, the speed of the main screw is 150rpm, plasticizing, extruding and granulating to obtain biodegradable toughened heat-resistant polylactic acid modified resin;

[0027] (3) The biodegradable toughened heat-resistant polylactic acid modified resin obtained in this example has a heat-resistant temperature of 91°C, and its tensile breaking strengt...

Embodiment 2

[0029] (1) A biodegradable toughened heat-resistant polylactic acid modified resin, which contains the following raw materials in terms of mass percentage: 70% DL-lactic acid (viscosity average molecular weight is 300,000), 15% thermoplastic starch, 10% % ramie fiber, 2% stearic acid, 2% gamma-glycidyl etheroxypropyl trimethoxysilane and 1% antioxidant 1010;

[0030] (2) Dry each raw material at 80°C for 12 hours, then add it to a high-speed mixer at 800r / min and blend for 20 minutes according to the above mass percentage, and add the obtained mixture to a twin-screw extruder at a temperature of 170°C, feed the screw The speed is 20rpm, the speed of the main screw is 180rpm, plasticizing, extruding and granulating to obtain biodegradable toughened heat-resistant polylactic acid modified resin;

[0031] (3) The biodegradable toughened heat-resistant polylactic acid modified resin obtained in this example has a heat-resistant temperature of 95°C, and its tensile breaking strengt...

Embodiment 3

[0033] (1) A biodegradable toughened heat-resistant polylactic acid modified resin, which contains the following raw materials in terms of mass percentage: 70% DL-lactic acid (viscosity average molecular weight is 20,000), 15% thermoplastic starch, 10% % ramie fiber, 2% stearic acid, 2% gamma-glycidyl etheroxypropyl trimethoxysilane and 1% antioxidant 1010;

[0034] (2) Dry each raw material at 80°C for 12 hours, then add it to a high-speed mixer at 800r / min and blend for 20 minutes according to the above mass percentage, and add the obtained mixture to a twin-screw extruder at a temperature of 170°C, feed the screw The speed is 20rpm, the speed of the main screw is 150rpm, plasticizing, extruding and granulating to obtain biodegradable toughened heat-resistant polylactic acid modified resin;

[0035] (3) The biodegradable toughened heat-resistant polylactic acid modified resin obtained in this example has a heat-resistant temperature of 82°C, and its tensile breaking strength...

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Abstract

The invention discloses a biodegradable toughened heat-resistant polylactic acid modified resin and a preparation method thereof. The polylactic acid modified resin of the present invention comprises the following raw materials by mass percentage: 30-90% polylactic acid, 5-65% thermoplastic starch, 3-40% fully biodegradable plant fiber, 1-10% auxiliary agent ; Wherein, auxiliary agent is lubricant, coupling agent and antioxidant. The raw materials are first dried, and then blended in a high-speed mixer according to the stated ratio for 5-30 minutes, and the resulting mixture is added to a twin-screw extruder for plasticization, extrusion, and granulation to obtain a biodegradable toughened heat-resistant polymer. Lactic acid modified resin. The preparation method of the polylactic acid modified resin of the present invention has simple equipment requirements and process flow, low cost, easy to realize large-scale production, and is economical and efficient; by adding thermoplastic starch and fully biodegradable plant fibers into the polylactic acid matrix, the product is guaranteed. Both good heat resistance and impact performance.

Description

technical field [0001] The invention belongs to the field of biodegradable polymer material blending and polymer molding processing, and specifically relates to a biodegradable toughened heat-resistant polylactic acid modified resin and a preparation method thereof. Background technique [0002] Polylactic acid is a class of aliphatic polyesters from renewable resources with good biocompatibility and biodegradability. Hydrolyzed in the natural environment or degraded by microorganisms, polylactic acid can eventually be decomposed into carbon dioxide and water. With the improvement of people's awareness of environmental protection and the rising price of traditional petroleum-based polymers, polylactic acid has received more and more attention, and its application fields have continued to expand, ranging from biomedical applications to packaging, fibers, electronic products, and automobiles. It is expected to become one of the most important materials in the 21st century. A...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L3/02C08L97/02C08K5/00C08K5/053C08K5/09C08K5/134
CPCC08L67/04C08L2201/06C08L2201/08C08L2205/025C08L2205/03C08L2205/035C08L2205/16
Inventor 李鸣钰崔成杰谢众
Owner HEILONGJIANG XINDA ENTERPRISE GRP
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