Starch-based degradable PP/PHB composite material and preparation method thereof

Abstract

The invention discloses a starch-based degradable PP / PHB composite material and a preparation method thereof. The starch-based degradable PP / PHB composite material is prepared from components in partsby weight as follows: 20-40 parts of copolymerized polypropylene resin, 30-40 parts of polyhydroxybutyrate resin, 20-30 parts of starch, 2-4 parts of a toughening compatilizer, 1-2 parts of a plasticizer, 0.5-1 part of a coupling agent, 0.1-0.5 parts of a photolysis catalyst, 0.2-0.5 parts of an antioxidant and 0.5-1 part of a lubricating dispersant. The composite material has the advantages thatquick degradation can be realized, the environmental pollution can be reduced, the cost of polyhydroxybutyrate resin can be reduced and the like; besides, the composite material has good mechanical performance, processability and solvent resistance, wide application range and high practicability.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a starch-based degradable PP / PHB composite material and a preparation method thereof. Background technique [0002] Polypropylene (PP) is one of the five general-purpose plastics. It is widely used in the industry due to its light weight, non-toxicity, easy processing, anti-disturbance, low price, and durability. However, polypropylene (PP) also has the disadvantage of being difficult to degrade. The waste polypropylene plastic may degrade itself for hundreds of years if it is buried in the ground, seriously polluting the environment. [0003] Polyhydroxybutyrate resin (PHB) is a biopolymer material that has developed rapidly in recent years. It is a natural polymer biomaterial synthesized by many microorganisms - intracellular polyester. Polyhydroxybutyrate resin (PHB) is an environmentally friendly bioplastic with excellent performance. It also has good biocompatibil...

AI Technical Summary

Problems solved by technology

However, the disadvantage of polyhydroxybutyrate resin (PHB) is that the production cost is high, and the market price is 4-6 times that of polypropylene, which greatly limits its application.

[0004] At present, most degradable polypropylene plastics are improved by simply filling natural degradable polymers such as starch and fiber in polypropylene, but the degradation rate of these materials is slow, and the tensile strength, elongation at break and impact strength Both are very low and cannot meet certain usage requirements

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