Overview of fiber reinforced phenolic resin

2022-06-22
  • Detail

Fiber reinforced phenolic resin - overview

according to an article in JEC composite magazine NO.67, phenolic resin is required for many FRP applications requiring FST characteristics (fire, smoke and low toxicity). Although there are some performance limitations (especially brittleness), phenolic resin is still a large class of commercial resin, with an annual output of nearly 6million tons. Phenolic resin has excellent dimensional stability and chemical corrosion resistance caused by drying of gauze on wet ball sensor, and can be used stably in the temperature range of 150 ~ 180 ℃. These properties, together with their cost performance advantages, have become the factors that promote the continuous use of phenolic resin in FRP products. Typical applications include aircraft interior trim, aircraft cargo tank lining, interior parts of rail vehicles, offshore oil field platform grids and water collecting pipes, tunnel materials, friction materials, rocket nozzle insulation materials and other FST related products

type of fiber reinforced phenolic resin composites

fiber reinforced phenolic resin composites include materials reinforced with chopped fibers, fabrics and long fibers. Early chopped fibers (wood, cellulose, etc.) are still used in phenolic molding compounds for a variety of purposes, especially automotive parts, such as water pump covers, friction parts, etc. Newer phenolic molding compounds contain glass fiber, metal fiber or more recent carbon fiber. The phenolic resin used in moulding materials is a linear phenolic varnish resin, using hexamethylene tetramine as curing agent

prepreg fabric materials are used for various purposes, such as RTM, honeycomb core of sandwich structure, bulletproof materials, aircraft inner panels, cargo tank liners, etc. Long fiber reinforced products are formed by winding or pultrusion. Most of the fabrics and long fiber reinforced composites use soluble phenolic resin which is soluble in water or solvent. In addition to the soluble phenolic resin, FRP also uses other related phenolic systems, such as benzoxazine, cyanate ester and the newly developed resin system calidur

benzoxazine is a new phenolic resin. It is different from the traditional phenolic resin in that each part of the phenolic molecule is connected by forming a ring structure rather than bridged by methylene [-ch2-]. Benzoxazine is easily prepared from phenolic materials (bisphenol or linear phenolic varnish), primary amines and formaldehyde. The ring opening polymerization of benzoxazine can not produce by-products or volatiles, and can improve the dimensional stability of the final product. In addition to high heat resistance and flame retardancy, Benzoxazine Resin also has characteristics that traditional phenolic resin does not show, such as water absorption, stable low dielectric properties, etc

calidur is a new generation of one component room temperature stabilized poly (aryl ether amide) thermosetting matrix resin, which was developed by Evonik Degussa for the aviation and electronics industries in recent years. The resin was cured at 140 ℃ for 2 hours, and the glass transition temperature (TG) was 195 ℃. At present, calidur shows many characteristics that are very conducive to high-performance composites: no volatile emissions, less curing heat release and curing shrinkage, high thermal strength rate, good wet strength, high compressive strength and shear strength of composites, and excellent toughness. This new resin can be used in a variety of products as a low-cost substitute for epoxy, bismaleimide and cyanate ester resins with medium and high Tg temperature, and can be used in aviation, transportation, automobile, electrical and electronic and other high demand applications

note: the reprinted contents are indicated with the source. The reprint is for the purpose of transmitting more information, and does not mean to agree with their views or confirm the authenticity of their contents

汉森四磨汤孕妇能喝吗
薇婷
潮热多汗会引起心悸吗
受孕难可以吃哪些中成药

Copyright © 2011 JIN SHI