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PLA/PBAT (Polylactic Acid/Poly(Butylene adipate-Co-Terephthalate) blending modified biodegradable resin prepared with chain extender and preparation method thereof

A biodegradable resin, blending and modification technology, applied in the field of degradable plastics, can solve the problems of inability to directly blown into film products, poor mechanical properties of resin, viscosity heat loss, etc., to achieve superior mechanical properties, impact resistance and Improvement of tear performance and improvement of resin viscosity

Inactive Publication Date: 2019-03-01
NANJING WURUI BIODEGRADABLE NEW MATERIAL RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Both PLA and PBAT belong to aliphatic resins and are the main biodegradable raw materials. However, the compatibility of the two materials is very poor. There is peeling phenomenon when granulating the strands, and they cannot be directly blown into film products after granulation. The heat loss of the viscosity is serious during processing, and the mechanical properties of the blended resin are very poor

Method used

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  • PLA/PBAT (Polylactic Acid/Poly(Butylene adipate-Co-Terephthalate) blending modified biodegradable resin prepared with chain extender and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] This adopts chain extender to prepare the method for PLA / PBAT blending modified biodegradable resin, and its steps comprise:

[0030] (1) Add 0.8% of the chain extender KL-E 4370 (Shanxi Research Institute of Chemical Industry) to double the mass of ethyl acetate solution, stir to dissolve it;

[0031] (2), weigh and mix the dried PLA granules and PBAT granules, and spray the solution obtained in step (1) on the surface of the mixed granules by spraying, wherein 20 parts of PLA are 4032D from American Nature Works, and 80 parts of PBAT are from Guangzhou Kingfa Science and Technology Co., Ltd. 1024, KL-E 4370 0.8% share;

[0032] (3), the mixed particles are sent into the twin-screw extrusion granulator, and through extrusion, air cooling, drawing, and cold cutting, PLA / PBAT blended modified biodegradable resin particles are made, wherein the temperature of the twin-screw extrusion The temperature is 130-180°C, the screw rotation speed is 350-400r / min, and the die head...

Embodiment 2

[0036] This adopts chain extender to prepare the method for PLA / PBAT blending modified biodegradable resin, and its steps comprise:

[0037] (1) Add 0.8% of the chain extender KL-E 4370 (Shanxi Research Institute of Chemical Industry) to double the mass of ethyl acetate solution, stir to dissolve it;

[0038] (2), weigh and mix the dried PLA granules and PBAT granules, and spray the solution obtained in step (1) on the surface of the mixed granules by spraying, wherein 10 parts of PLA are 4032D from American Nature Works, and 90 parts of PBAT are from Guangzhou 1024 of Kingfa Technology Co., Ltd., KL-E 4370 0.8%;

[0039] (3), the mixed particles are sent into the twin-screw extrusion granulator, and through extrusion, air cooling, drawing, and cold cutting, PLA / PBAT blended modified biodegradable resin particles are made, and the temperature of the twin-screw extrusion is The temperature is 160-180°C, the screw rotation speed is 350-400r / min, and the die head pressure is 3-5...

Embodiment 3

[0043] This adopts chain extender to prepare the method for PLA / PBAT blending modified biodegradable resin, and its steps comprise:

[0044] (1) Add the chain extender KL-E 4370 (Shanxi Research Institute of Chemical Industry) into the ethyl acetate solution of double the mass, stir to dissolve it;

[0045] (2), weigh and mix the dried PLA particles and PBAT particles, and spray the solution obtained in step (1) on the surface of the mixed particles by spraying, wherein 40 parts of PLA are 4032D from Nature Works of the United States, and 60 parts of PBAT are from Guangzhou 1024 of Kingfa Technology Co., Ltd., KL-E 4370 0.8%;

[0046] (3), the mixed particles are sent into the twin-screw extrusion granulator, and through extrusion, air cooling, drawing, and cold cutting, PLA / PBAT blended modified biodegradable resin particles are made, and the temperature of the twin-screw extrusion is The temperature is 130-180°C, the screw rotation speed is 350-400r / min, and the die head pr...

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Abstract

The invention discloses PLA / PBAT (Polylactic Acid / Poly(Butylene adipate-Co-Terephthalate) blending modified biodegradable resin prepared with a chain extender. The PLA / PBAT blending modified biodegradable resin is prepared from the following raw materials in parts by weight: 10 to 60 parts of PLA, 40 to 90 parts of PBAT and 0.5 to 1.5 parts of a chain extender KL. The invention further discloses amethod for preparing the PLA / PBAT blending modified biodegradable resin and a packaging bag with the chain extender. During blending granulation of the PLA and the PBAT, a certain amount of chain extender is added so as to increase volume and resist hydrolysis, and the problem of poor compatibility between the PLA and the PBAT can be solved effectively, the molecular weight of the resin is improved, and the prepared resin is improved in viscosity and mechanical performance. The chain extender KL-E is dissolved in an ethyl acetate solution, and can be uniformly distributed in mixed particles by spraying, so that short-chain molecules and terminal carboxyl molecules are changed into long-chain macromolecules at a certain temperature and under the action of the shearing force of double screwrods, and the hydrolysis resistance is improved. Meanwhile, the compatibility is improved rapidly, and the mechanical indexes can meet the requirements on membrane products.

Description

technical field [0001] The invention relates to a PLA / PBAT blended modified biodegradable resin prepared by using a chain extender and a preparation method thereof, belonging to the field of degradable plastics. Background technique [0002] Polylactic acid (PLA) is a new type of bio-based and renewable biodegradable material, which is made of starch raw materials extracted from renewable plant resources. The starch raw material is saccharified to obtain glucose, and then fermented by glucose and certain strains to produce high-purity lactic acid, and then synthesize polylactic acid with a certain molecular weight by chemical synthesis. PLA has good biodegradability. After use, it can be completely degraded by microorganisms in nature under specific conditions, and finally produces carbon dioxide and water. It does not pollute the environment and is recognized as an environmentally friendly material. [0003] PBAT is a copolymer of butylene adipate and butylene terephthalat...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L67/04C08L33/14
CPCC08L67/02C08L2201/06C08L2203/16C08L2205/03C08L2205/08C08L67/04C08L33/14
Inventor 王庭慰
Owner NANJING WURUI BIODEGRADABLE NEW MATERIAL RES INST CO LTD
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