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High-toughness polylactic acid composite material and preparation method thereof

A composite material, polylactic acid technology, applied in the field of high-toughness polylactic acid composite material and its preparation, can solve the problems of no improvement in mechanical properties of composite materials, reduction of material strength and rigidity, difficulty in effective toughening of PLA, etc., to achieve low cost , Improve the strength and rigidity, maintain the effect of strength and rigidity

Active Publication Date: 2014-04-16
杭州卓普新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polybutadiene rubber has two major defects in toughening polar materials: 1) toughening will reduce the strength and rigidity of the material to a large extent; 2) non-polar polybutadiene and polar PLA Poor compatibility, it is difficult to achieve effective toughening of PLA
The technical solution increases the foaming of supercritical carbon dioxide by adding wood powder, which is more conducive to the formation of cells, so that the size of the cells is uniform and the cell density is large. The technical solution focuses on improving the foaming effect, but the composite material No improvement in mechanical properties

Method used

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  • High-toughness polylactic acid composite material and preparation method thereof
  • High-toughness polylactic acid composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] 98.9 parts of PLA resin (NatureWorks, USA, 4203D) and toughening agent butadiene / butyl acrylate block copolymer (produced by Xinxiang Xinglong Chemical Co., Ltd., with the structure of formula I, where m=22, n=11) 0.5 parts and 0.5 parts of 80 mesh pure poplar wood powder (manufactured by Qingdao Fumulin New Energy Equipment Co., Ltd.) were dried in a vacuum oven at 70°C for 4 hours, and then the baked material was mixed with 0.1 parts of chain extender tert-butyl peroxyisooctanoate Add them together into a high mixer and mix evenly, and then melt, blend and extrude them in a twin-screw extruder. The temperature of each section of the twin-screw extruder from the feed to the discharge is: the temperature of the first zone is 160°C, the temperature of the second zone is 170°C, the temperature of the third zone is 180°C, and the temperature of the fourth zone is 190°C. The extruded product of the twin-screw extruder was cooled and cut into pellets, and then dried in a vac...

Embodiment 2

[0034]89.5 parts of PLA resin (NatureWorks, USA, 4203D) and toughening agent butadiene / butyl acrylate block copolymer (produced by Xinxiang Xinglong Chemical Co., Ltd., with the structure of formula I, where m=22, n=11) 5 parts and 5 parts of 80-mesh pure poplar wood powder (manufactured by Qingdao Fumulin New Energy Equipment Co., Ltd.) were dried in a vacuum oven at 70°C for 4 hours, and then the baked material was mixed with 0.5 parts of chain extender tert-butyl peroxyisooctanoate Add them together into a high mixer and mix evenly, and then melt, blend and extrude them in a twin-screw extruder. The temperature of each section of the twin-screw extruder from the feed to the discharge is: the temperature of the first zone is 160°C, the temperature of the second zone is 170°C, the temperature of the third zone is 180°C, and the temperature of the fourth zone is 190°C. The extruded product of the twin-screw extruder was cooled and cut into pellets, and then dried in a vacuum o...

Embodiment 3

[0036] 79 parts of PLA resin (NatureWorks, USA, 4203D) and toughening agent butadiene / butyl acrylate block copolymer (produced by Xinxiang Xinglong Chemical Co., Ltd., with formula I structure, where m=22, n=11) 10 parts and 10 parts of 80 mesh pure poplar wood powder (manufactured by Qingdao Fumulin New Energy Equipment Co., Ltd.) were dried in a vacuum oven at 70°C for 4 hours, and then the baked material was mixed with 1 part of chain extender tert-butyl peroxyisooctanoate Add them together into a high mixer and mix evenly, and then melt, blend and extrude them in a twin-screw extruder. The temperature of each section of the twin-screw extruder from the feed to the discharge is: the temperature of the first zone is 160°C, the temperature of the second zone is 170°C, the temperature of the third zone is 180°C, and the temperature of the fourth zone is 190°C. The extruded product of the twin-screw extruder was cooled and cut into pellets, and then dried in a vacuum oven at 70...

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Abstract

The invention discloses a high-toughness polylactic acid composite material. The high-toughness polylactic acid composite material is composed of the following components in parts by weight: 58-98.9 parts of polylactic acid (PLA) resin, 0.5-20 parts of a butadiene / butyl acrylate segmented copolymer, 0.5-20 parts of wood flour and 0.1-2 parts of a chain extender. The high-toughness polylactic acid composite material adopts the butadiene / butyl acrylate segmented copolymer as a toughening agent so as to realize the aim of effectively toughening PLA resin and overcome the fragile defect of PLA; meanwhile, the wood flour and the chain extender are adopted so that the strength and the rigidity of the material are improved; and the PLA is toughened and the strength and the rigidity of the material are kept as much as possible. The invention further discloses a preparation method for the high-toughness polylactic acid composite material; a double-screw extruder is used for fusing, co-extruding and granulating; and the preparation method is simple in equipment, convenient to operate, easy to control and low in cost and the toughness of the PLA can be improved very well.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a high-toughness polylactic acid composite material and a preparation method thereof. Background technique [0002] With the enhancement of people's awareness of environmental protection, the development and utilization of environmentally friendly biodegradable materials to replace non-degradable traditional petroleum-based polymer materials has become a hot spot in research and development. Polylactic acid (PLA) is a new type of degradable material, which is derived from lactic acid produced by the fermentation of plant starch and chemically transformed. PLA not only has the renewability that petroleum synthetic resins such as polyethylene and polypropylene do not have, but also has good biodegradability, can be completely degraded in nature, and finally produces carbon dioxide and water that are harmless to the environment. green polymer materials. However, PLA has disadvanta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L53/00C08L97/02C08K5/14B29C47/92B29C48/92
CPCB29C48/04B29C48/40B29C48/875B29C48/911B29C48/92B29C2948/92266B29C2948/92485B29C2948/92704B29C2948/92895
Inventor 蔡增坤杨志伟
Owner 杭州卓普新材料科技有限公司
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