Method for preparing polypropylene/hydrotalcite nanometer composite material by using hydrotalcite as nucleating agent

Abstract

The invention discloses a method for preparing a polypropylene / hydrotalcite nanometer composite material by using hydrotalcite as a nucleating agent, and belongs to the technical field of polymer / inorganic nanometer composite material preparation. According to the method, the prepared hydrotalcite is washed by acetone and is then dispersed into xylene; next, the materials are added into the molten polypropylene xylene solution; stirring is performed; through ethanol extraction, the polypropylene / hydrotalcite nanometer composite material is obtained. The method has the advantages that the hydrotalcite which is not dried is directly added into the polypropylene solution; the agglomeration of the powder body hydrotalcite in polypropylene substrates can be avoided; the polarity is reduced by the hydrotalcite washed by the acetone; the compatibility of the hydrotalcite and the nonpolar polypropylene is improved, so that the dispersibility of the hydrotalcite in the polypropylene is better. The high-dispersibility hydrotalcite achieves the heterogeneous nucleation effect in the polypropylene crystallization process; the effects of inducing the polypropylene crystallization and accelerating the crystallization speed are achieved.

Description

technical field [0001] The invention belongs to the technical field of preparation of polymer / inorganic nano composite materials. In particular, it provides a method for preparing polypropylene / hydrotalcite nanocomposite material by using hydrotalcite as a nucleating agent. Background technique [0002] In recent years, polymer / inorganic nanocomposites have gradually developed into one of the most important types of materials in the industry, because polymer / inorganic nanocomposites combine the rigidity, dimensional stability, and thermal stability of inorganic substances with the properties of polymers. Toughness, processability and dielectric properties, combined with the advantages of nanomaterials, are widely used in chemical engineering, transportation, military industry, and aerospace and other fields. [0003] Among many polymers, polypropylene (PP) is a kind of polymer with a wide range of applications. Polypropylene has many advantages, such as its abundant source...

AI Technical Summary

Problems solved by technology

However, due to the particularity of its own structure, polypropylene also has some disadvantages. For example, the methyl group on its side chain will reduce the flexibility of the chain, and the spherulite particles will be coarse during crystallization, resulting in a high embrittlement temperature and poor impact resistance; In the process of injection molding, extrusion, etc., the shrinkage rate is relatively large, and the dimensional stability is reduced; it is not resistant to aging, and the service life is shortened

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