Preparation method of heat-resisting and corrosion-resisting engineering plastic

Abstract

The invention discloses a preparation method of heat-resisting and corrosion-resisting engineering plastic. The preparation method disclosed by the invention is characterized in that a third phenolphthalein monomer is introduced in a preparation process of master batch, and a flexible diethanol part in a polyester macromolecular chain is replaced by a rigid phenolphthalein group, so that a rigid diacid monomer and rigid phenolphthalein monomer connected segment is formed, the rigidity and the crystallization performance of a whole molecule are enhanced, and glass-transition temperature and a melting point are raised. According to the preparation method disclosed by the invention, by adopting a radiation crosslinking process, heat resistance and corrosion resistance of the engineering plastic are improved; according to an adopted radiation crosslinking agent, benzene-containing anhydride is used as a synthetic raw material, and a benzene ring structure is introduced, so that the melting point of a crosslinking promoter is improved, and the radiation resisting stability of the crosslinking promoter is further improved; prepared engineering plastic adopts the radiation crosslinking promoter; having increased molecular weight, a benzene ring structure and low high-temperature volatility, the radiation crosslinking promoter has good compatibility with the engineering plastic; according to the preparation method disclosed by the invention, flame retardant materials such as graphene, titanium dioxide and halloysite nanotubes and aging-resisting materials such as wollastonite needle-like fibers form a compound synergistic effect, so that the flame retardant property and the aging resisting property of the engineering plastic are greatly improved.

Description

technical field [0001] The invention relates to the technical field of engineering plastics, in particular to a preparation method of heat-resistant and corrosion-resistant engineering plastics. Background technique [0002] Engineering plastics can meet higher requirements in terms of mechanical properties, durability, corrosion resistance, heat resistance, etc., and are more convenient to process and can replace metal materials. Engineering plastics are widely used in electronics, automobiles, construction, office equipment, machinery, aerospace and other industries. It has become an international trend to replace steel and wood with plastic. [0003] With the continuous development of science and technology, cutting-edge industrial sectors such as aerospace, electronic communication and military have higher and higher requirements for "lightweight", "high temperature resistance" and "high performance" of fiber reinforced composite materials. At present, the advanced stru...

AI Technical Summary

Problems solved by technology

At present, the advanced structural materials used in my country's aerospace and other high-tech fields are mainly thermosetting composite materials, but due to the relatively low impact resistance and damage resistance of thermosetting composite materials, poor heat resistance, and high manufacturing costs, etc. Therefore, there is an urgent need for new composite materials with higher heat resistance and good mechanical properties at high temperatures