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High-mechanical strength and biodegradable PLA-PHBV composite material, preparation method thereof and thin film

A technology of mechanical strength and biodegradation, which is applied in the field of PLA/PHBV composite materials and its preparation, can solve problems such as low crystallinity, lower melting temperature, and need to increase glass transition temperature, so as to improve crystallinity, reduce spherulite size, Effect of modulus and glass transition temperature increase

Inactive Publication Date: 2019-04-09
GUANGDONG JUHANG INST FOR ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the unsolved problems are: the glass transition temperature needs to be increased, the crystallinity needs to be controlled to be low, the melting temperature needs to be lowered, and the barrier properties of existing films need to be improved.

Method used

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  • High-mechanical strength and biodegradable PLA-PHBV composite material, preparation method thereof and thin film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Preparation of ethylene-vinyl acetate copolymer grafted glycidyl methacrylate modified toughening agent:

[0036] Ethylene-vinyl acetate copolymer (vinyl acetate content is less than 40%) 40 parts by weight;

[0037] 10 parts by weight of glycidyl methacrylate;

[0038] Initiator dibenzoyl peroxide BPO 1 weight part;

[0039] Preparation of EVA-g-GMA:

[0040] Weigh EVA, GMA, BPO and add them to the rotational rheometer in turn, and banbury at 110-140°C and 90-130rad / min for 5-20min to prepare EVA-g-GMA. The grafted sample was dissolved in chloroform, and then precipitated with ethanol for several times and suction-filtered, and the operation was repeated three times, and then the purified product was dried in a vacuum oven at 50° C. for 24 hours.

Embodiment 2

[0042] Preparation of EVA-g-GMA:

[0043] Ethylene-vinyl acetate copolymer (vinyl acetate content is less than 40%) 50 parts by weight;

[0044] 3 parts by weight of glycidyl methacrylate;

[0045] Initiator dibenzoyl peroxide BPO 0.5 parts by weight;

Embodiment 3

[0047] Preparation of EVA-g-GMA:

[0048] Ethylene-vinyl acetate copolymer (vinyl acetate content is less than 40%) 60 parts by weight;

[0049] 5 parts by weight of glycidyl methacrylate;

[0050] Initiator dibenzoyl peroxide BPO 2 parts by weight;

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Abstract

The invention discloses a high-mechanical strength and biodegradable PLA-PHBV composite material. The composite material contains the following components in parts by weight: 40-80 parts of polylacticacid and 5-30 parts of 3-hydroxybutyric acid-co-3-hydroxyvaleric acid copolymer, 2-15 parts of an ethylene-vinyl acetate copolymer grafted glycidyl methacrylate modified toughening agent, 2-8 parts of a solubilizer and 0.2-0.8 part of a nucleating agent. The composite material belongs to the field of high molecular materials and has the advantages that the mechanical property is improved, meanwhile, the glass transition temperature is high, the crystallization degree is low, and the melting temperature is low. The invention further discloses a preparation method of the composite material anda thin film prepared from the composite material. The thin film can present an excellent barrier property.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a PLA / PHBV composite material with high mechanical strength and biodegradability, a preparation method and a film thereof. Background technique [0002] CN 201310009025.3 discloses a biodegradable composite film material with controllable degradation rate and its preparation method, which includes 100 parts by weight of matrix resin, 0-40 parts by weight of other biodegradable polymers, and 0.5-1.5 parts by weight of heat stabilizer. 0.3-5 parts by weight of nucleating agent, 1-5 parts by weight of compatibilizer, 2-15 parts by weight of plasticizer, 0.3-5 parts by weight of opening agent; matrix resin is polylactic acid (PLA) and 3-hydroxybutyric acid- 3-Hydroxycaproic acid copolyester (PHBH) is obtained by mixing 20-80 parts by weight of each; other biodegradable polymers are polybutylene succinate (PBS), polypropylene carbonate (PPC) , 3-hydroxybutyric acid-3-hydroxyvaleric a...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L51/06C08K3/34C08K5/098C08J5/18
CPCC08J5/18C08J2367/04C08J2451/06C08J2467/04C08K2201/011C08L67/04C08L2201/06C08L2205/025C08L2205/03C08L2205/24C08L51/06C08K3/346C08K5/098C08K5/0083
Inventor 许宏武姚跃
Owner GUANGDONG JUHANG INST FOR ADVANCED MATERIALS CO LTD
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