PET film with high extinction and uvioresistant performances and its preparation method

Abstract

The invention relates to a PET film with high extinction and uvioresistant performances and its preparation method. The preparation method includes steps of melting and blending a PET slice and a core-shell structure structural organic / inorganic compound hollow porous particle to prepare a PET yogon slice; processing the PET yogon slice to prepare the PET film with high extinction and uvioresistant performances. Finally, the product is evenly dispersed with the core-shell structure structural organic / inorganic compound hollow porous particle mainly consisting of crosslinking ball, titanium dioxide nano-particle and organic ultraviolet absorbent; the inner part of the crosslinking ball is hollow, and the surface is porous and has a structure formed by mutually crosslinking copolymer molecular chains containing styrene and bifunctionality dimethyl methacrylate monomer structural units; the titanium dioxide nano-particle is coated in the crosslinking ball and connected with the crosslinking ball through a covalent bond ; an organic ultraviolet absorbent is doped in the crosslinking structure and / or attached on the inner wall of the crosslinking ball. The product has good extinction and uvioresistant shielding effects and wide application; the method is simple in technique and reasonable in flow.

Description

technical field [0001] The invention belongs to the field of functional films, and relates to a high-performance PET film with extinction and ultraviolet resistance and a preparation method thereof. Background technique [0002] Ultraviolet rays in sunlight are the main cause of aging of polymer materials. Polymer materials will absorb ultraviolet rays and cause self-oxidation, resulting in polymer degradation. This process is called photoredox or photoaging. Although ultraviolet light only accounts for about 5% of sunlight, its energy is very large, and its energy is enough to destroy the chemical bonds of polymers, make its molecular chains break and crosslink, resulting in malignant changes in its mechanical properties, and at the same time, its color will also change. [0003] On the other hand, there are very few industrial materials with anti-ultraviolet function at present. It is common to sputter materials with anti-ultraviolet function on the film. Such materials ar...

AI Technical Summary

Problems solved by technology

Compared with other methods of preparing polymer particles such as precipitation method, reverse suspension cross-linking method, spray drying method, etc., the preparation of microspheres by electrostatic spraying has simple process, strong controllability, environmental protection and no need to use a large amount of emulsifier. The electrostatic spray method is easy to prepare monodisperse particles and the final particles can have a variety of shapes, such as hollow and porous, such as existing literature (Zhan Naiqian. Preparation of polystyrene functional materials by electrospinning[D]. Jilin University, 2010.) reported that polystyrene solution can prepare porous hollow microspheres by electrostatic spray molding, and the prepared polystyrene (PS) hollow microspheres are chemically stable at room temperature and have good processability. However, since the glass transition temperature of polystyrene (PS) is only 100°C, the three-dimensional structure will be destroyed under high temperature conditions, so it cannot be applied to melt processing.

This greatly affects the application prospects of PS hollow microspheres

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