Degradable epoxy resin modified by helical ring acetal, and preparation method and application thereof

Abstract

The invention discloses degradable epoxy resin modified by helical ring acetal, and a preparation method and an application thereof. The degradable epoxy resin includes, by mass, 100 parts of epoxy resin, 8-80 parts of helical ring acetal diphenol, and 0-6 parts of a catalyst. The components are uniformly mixed and are reacted at 60-160 DEG C for 0.5-24 hours. The degradable epoxy resin, when being cured, can be degraded in a quite gentle condition, so that a fiber composite material prepared from the epoxy resin allows the fibers to be easily recovered, wherein the recovered fibers can hold the quality of the original fibers.

Description

technical field [0001] The invention relates to the field of polymers and composite materials, in particular to a degradable epoxy resin modified by a helical ring acetal and its preparation method and application. Background technique [0002] Epoxy resin is one of the three general-purpose thermosetting resins. It is an insoluble and infusible polymer material with a three-dimensional network structure obtained through chemical crosslinking. It has excellent thermodynamic properties and dimensional stability. It is used in high-performance coatings, Adhesives, composite materials, electronic packaging materials and other fields are widely used, and it is difficult to replace them with thermoplastic materials. The global annual output of epoxy resin is about 3 million tons. [0003] However, due to the covalently cross-linked network structure, traditional epoxy resins cannot be reshaped or reprocessed by heating and solvent dissolution, and are more difficult to recycle. ...

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Problems solved by technology

[0005] Japanese Tamotsu Hashimoto et al. (Journal of Polymer Science Part a-Polymer Chemistry 2012, 50, 3674-3681) introduced the acetal structure using a vinyl ether compound containing epoxy groups, which is complicated to synthesize, and the epoxy resin is purified simultaneously. Difficult, need to use the method of the pillar, the cycle is long

[0006] The epoxy resin prepared by Christopher K.Ober et al. (Chemistry of Materials 1998,10,1475-1482.) in the United States has great differences in structure, resulting in differences in processing performance and traditional resins

[0007] However, the cycle of synthesizing new epoxy resins is relatively long. At the same time, the synthetic resins are different from traditional resins in processing performance, and the possibility of replacing traditional epoxy resins in the short term is relatively small.

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