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

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...

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