Preparation method of polypropylene nano composite material

Abstract

The application of the invention discloses a preparation method of a polypropylene nano composite material, which comprises the following steps of: (1) proportionally fusing and blending inorganic nano particles and maleic anhydride grafted polypropylene on an internal mixer, an open mill or a screw extruder to obtain a reinforcing agent master batch; (2) proportionally fusing and blending a beta crystal type nucleating agent and the maleic anhydride grafted polypropylene on the internal mixer, the open mill or the screw extruder to obtain a flexibilizer master batch; and (3) proportionally diluting and dispersing the reinforcing agent master batch and the flexibilizer master batch in a polypropylene high-polymer substrate, and carrying out injection molding to obtain the polypropylene nano composite material. With the preparation method, the technical problem that the nano particles and the nucleating agent agglomerate in the polypropylene substrate is well solved; when the flexibility of the modified polypropylene material is greatly improved, strength, rigidity, heat deflection temperature and other parameters are also improved to a certain extent, and simultaneously the density of the material is hardly increased so that a series of high-strength, high-flexibility and high-heat resistance modified polypropylene materials can be prepared.

Description

technical field

[0001] The invention belongs to the technical field of polymer materials, and in particular relates to a preparation method of a polypropylene nanocomposite material. Background technique

[0002] Polypropylene (PP) has been widely used because of its low density, excellent electrical properties, corrosion resistance, hygiene, moisture resistance, and good processability. However, polypropylene also has disadvantages such as poor toughness (especially low notched impact strength), insufficient high-temperature strength rigidity, and low heat resistance, which limit its use in wider fields, especially as engineering materials in automobiles, manufacturing, and construction. , chemical pipelines and other high-end applications. It is of great application value to carry out high-performance modification research on polypropylene to improve the comprehensive performance of polypropylene, thereby extending the application of polypropylene to certain fields of tra...