Plastic film with high stretching resistance and preparation process thereof

Abstract

The invention discloses a plastic film with high stretching resistance. The plastic film is prepared from the following components in parts by weight: 43-52 parts of grafted carbon nanotubes, 14-16 parts of trifluoroacetic anhydride, 27-33 parts of vinyl trimethoxy silane, 75-82 parts of diethyl ether, 31-34 parts of azodiisobutyronitrile, 3-5 parts of polyoxyethylene glycol bisstearate, 2-4 partsof a plasticizer and 100 parts of water. The prepared resin takes carbon nanotubes as a neutral supporting body, and the surfaces of the carbon nanotubes are grafted with a plurality of branch chains, a plurality of fluorine elements are contained by each branch chain, so that resin aging resistance can be realized; one end of each branch chain is super-branched through polymerization reaction, so that the polymer branch chains are polymerized on the branch chains; the super-branching can improve strength and toughness of the resin; the polymer is polymerized from vinyl trimethoxy silane, sothat a plurality of alkoxy groups are uniformly distributed on the prepared resin super-branched chains, and thus the resin has relatively high strength and water resistance; and the resin has certainflame resistance in the presence of the alkoxy groups.

Description

technical field [0001] The invention belongs to the field of plastic films, and relates to a high-stretch-resistant plastic film and a preparation process thereof. Background technique [0002] Existing plastic films are made of polyvinyl chloride, polyethylene, polypropylene, polystyrene and other resins, used for packaging and as a coating layer, and plastic packaging and plastic packaging products are taking an increasing share in the market. The bigger, especially the composite plastic flexible packaging, has been widely used in food, medicine, chemical and other fields. [0003] Existing plastic films can directly add functional additives to polyvinyl chloride, polyethylene, polypropylene, polystyrene and other resins to achieve different properties. For plastic films used in plastic greenhouses, they need to be supported due to their long-term exposure to wind and sun. Therefore, it must have high tensile strength and aging resistance. The existing polyvinyl chloride ...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a kind of high tensile plastic film and preparation technology thereof, after directly grafting cross-linking on carbon nanotubes, then polymerize the polyurethane resin that generates, the plastic film of preparation, and directly add carbon nanotubes Compared with the plastic film produced in polyurethane resin, the tensile strength is higher, and the tensile strength reaches 43.86MPa. Since the resin prepared by grafting carbon nanotubes is centered on carbon nanotubes, through the support of carbon nanotubes, Realize the improvement of tensile strength, after filling α-cyclodextrin in the carbon nanotube at the same time, because α-cyclodextrin is a cavity structure, and the inner diameter of the cavity of α-cyclodextrin is smaller than the inner diameter of the carbon nanotube, at the same time The surface of the cavity of α-cyclodextrin is hydrophilic, the inside of the cavity is hydrophobic, and the inside of the cavity of the carbon nanotube is hydrophilic, so α-cyclodextrin enters the carbon nanotube under the dispersion of sodium dodecyl sulfate , so that the interior of the carbon nanotubes is filled with α-cyclodextrin, so that the strength of the prepared plastic film is further improved. By polymerizing several polymer branches, the strength and toughness of the resin can be improved through hyperbranching, which solves the problem that the existing plastic film is not high in strength and is still easy to tear under a large pulling force

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