Inorganic nano polymer modified high-strength plastic and preparation method thereof

Abstract

The invention provides an inorganic nano polymer modified high-strength plastic and a preparation method thereof. The inorganic nano polymer modified high-strength plastic comprises the following components by mass: 50-100 parts of a polymer matrix material, 0-50 parts of an inorganic nano polymer, 0.1-0.5 part of a plasticizer and 0.1-2 parts of an antioxidant; the inorganic nano polymer comprises the following components by mass: 20%-70% of nano silica sol, 10%-70% of alkoxysilane, 0.01%-5% of an acid catalyst, 0.1%-10% of an anion modifier, 0.05%-0.2% of a polymerization inhibitor and 2%-20% of a water-soluble solvent, the preparation process comprises the following steps of: melting the polymer matrix material, the inorganic nano polymer, the plasticizer and the oxidant at high temperature, then performing blending, extruding and granulating to obtain the inorganic nano polymer modified high-strength plastic. The mechanical property and wear resistance of the high-strength plasticprepared by the method are remarkably improved, the surface of the inorganic nano polymer contains active groups and has excellent compatibility with the polymer matrix material, and the prepared composite material has no particle migration or agglomeration phenomena and no stress defect in the long-term use process.

Description

technical field [0001] The invention belongs to the technical field of plastic materials, and in particular relates to an inorganic nanopolymer modified high-strength plastic and a preparation method thereof. Background technique [0002] The preparation of high-strength polyolefin materials is one of the research hotspots in the field of polymer science. The special properties of polyolefin materials determine their use in life and industry. The strength of a single polyolefin plastic cannot fully meet the market demand. Modification of polyolefin materials is an important means to improve its strength and expand its application fields. [0003] As a material for mechanical parts, polyamide materials can withstand higher mechanical stress and adapt to stricter chemical and physical environments. They have the characteristics of light weight, low noise, corrosion resistance, and stable chemical properties. They also have strong designability and low cost. The advantages of ...

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Problems solved by technology

[0004] At present, there are mainly five methods for preparing composite materials modified by inorganic nanomaterials: (1) In-situ polymerization method, firstly, the inorganic nanoparticles are uniformly dispersed in the solution, and then emulsion polymerization, bulk polymerization, oxidative polymerization or polycondensation are carried out to prepare The material particles are evenly distributed, but this method is costly and complicated

(2) The direct dispersion method allows the nanoparticles to be directly dispersed in the matrix material, the conditions are easy to control and the cost is low, but the nanoparticles are easy to agglomerate, resulting in performance defects

(3) Intercalation composite method, which uses inorganic materials with a layered structure to insert into a polymer matrix to form a multilayer composite material, but the size of the dispersed phase is large and difficult to control

(4) The sol-gel method can prepare a variety of polymer-based composite materials, but due to the volatilization of the solvent during the drying process, the internal stress is large, and the material is prone to cracks

(5) Blending composite method, in the melt, emulsion or solution state, the inorganic nanomaterial powder is mixed with the matrix material, thereby making a variety of polymer-based composite materials, but due to the conventional inorganic nanomaterials and polymers Compatibility defects, where nanomaterials in composites prepared by this method tend to agglomerate, leading to stress defects

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