Biodegradable foamed polypropylene and preparation method thereof
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A foamed polypropylene and biodegradable technology is applied in the field of polymer materials to achieve the effects of reducing costs, increasing the rate of biodegradation, and increasing the rate of degradation
Pending Publication Date: 2021-10-19
JIANGSU HAOSHENG PLASTIC IND TECH CO LTD
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Problems solved by technology
[0005] In order to overcome the above-mentioned defects of the prior art, embodiments of the present invention provide a biodegradable foamed polypropylene and a preparation method thereof. The problem to be solved by the present invention is: how to increase the degradation rate of polypropylene materials and reduce the Material pollution to the environment
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Embodiment 1
[0025] The invention provides a biodegradable foamed polypropylene, comprising the following raw materials in parts by weight: 40 parts of polypropylene resin, 30 parts of starch, 1 part of calcium hydroxide, 20 parts of vinyl acetate, 2 parts of dispersant, 1 part of oxygen agent, 1 part of foaming nucleating agent, 1 part of photodegradation agent and 4 parts of toughening agent.
[0026] In a preferred embodiment, the starch is one of potato starch, sweet potato starch or corn starch, the dispersant is aluminum sulfate, and the antioxidant is an alkyl monophenol antioxidant or azapine Cyclic polyphenol antioxidant, the photodegradant is iron stearate, the toughening agent is maleic anhydride grafted polypropylene or maleic anhydride grafted EVA, and the foaming nucleating agent is bicarbonate sodium.
[0027] The present invention also provides a preparation method of biodegradable foamed polypropylene, the specific preparation steps are as follows:
[0028] Step 1: Put t...
Embodiment 2
[0038] Different from Example 1, the present invention provides a biodegradable foamed polypropylene, including the following raw materials in parts by weight: 50 parts of polypropylene resin, 40 parts of starch, 3 parts of calcium hydroxide, 30 parts of vinyl acetate 4 parts, 4 parts of dispersant, 3 parts of antioxidant, 2 parts of foam nucleating agent, 3 parts of photodegradant and 7 parts of toughening agent.
Embodiment 3
[0040] All different from Examples 1-2, the present invention provides a biodegradable foamed polypropylene, comprising the following raw materials in parts by weight: 60 parts of polypropylene resin, 50 parts of starch, 5 parts of calcium hydroxide, acetic acid 40 parts of vinyl ester, 6 parts of dispersant, 5 parts of antioxidant, 3 parts of foaming nucleating agent, 5 parts of photodegradant and 10 parts of toughening agent.
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Abstract
The invention discloses biodegradable foamed polypropylene, and particularly relates to the technical field of high polymer materials. The biodegradable foamed polypropylene is prepared from the following raw materials: a polypropylene resin, starch, calcium hydroxide, vinyl acetate, a dispersing agent, an antioxidant, a foaming nucleating agent, a photodegradation agent and a toughening agent. According to the invention, calcium hydroxide and the vinyl acetate are used for modifying starch, an alkaline earth metal calcium hydroxide is used for primarily modifying the starch so as to improve the compatibility of the starch, and then ceric ammonium nitrate is used for carrying out graft copolymerization reaction on the vinyl acetate and the starch so as to greatly improve the compatibility of the modified starch after graft copolymerization, so that the mixing effect of the starch and the polypropylene is good so as to effectively improve the biodegradation rate of the polypropylene material; the photodegradation rate of the polypropylene material can be effectively improved by adding the photodegradation agent while the foamed polypropylene material is treated by utilizing biodegradation and photodegradation so as to greatly improve the degradation rate of the foamed polypropylene material.
Description
technical field [0001] The invention relates to the technical field of polymer materials, more specifically, the invention relates to a biodegradable foamed polypropylene and a preparation method thereof. Background technique [0002] Polypropylene (PP) has been widely used in various industries due to its good stability, excellent mechanical properties, and low price. However, the material degrades very slowly in the natural environment. Therefore, the " "White pollution" has caused great harm to the environment, which hinders the further development of PP. At present, two methods of incineration and landfill are mainly used to deal with PP waste products. Although these two treatment methods have alleviated the "white pollution" to a certain extent, they have brought about problems such as air pollution, soil pollution and water pollution. It is still impossible to eradicate the crux of the pollution of the environment by PP waste. [0003] Biodegradable plastics refer t...
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