Acid-resistant glass fibers

Excellent chemical and moisture resistance. Glass fibers do not absorb moisture, rot, or mildew and resist all solvents, and most acids and alkalis. 

The fragments of surfaces of the chemically resistant layer in the field of flange are possible at disassembly of chimney liner (Figure 4). If the received damages are not eliminated (Figure 5), destruction of FRP is developed because of intensive penetration of sulfur acid along glass fibers. 

Depending on the technical requirements such as corrosion resistance, pressure and temperature stability, industrial scale azo pigment synthesis is carried out in appropriate equipment. Suitable materials include cast iron, stainless steel, steel lined with rubber, acid-proof brick, enamel, synthetic resins supported by glass fiber, and wood. 

Copolymers of ethylene with up to 15-20% acrylic or methacrylic acid offer improved adhesion, abrasion resistance, toughness, and low-temperature flexibility compared to EVA. Applications include extrusion coatings on aluminum foil for pouches, wire and cable, packaging film, laminations with metal and glass fibers (building and automotive products) and polyurethane (carpet backing). 

These resins are characterized by unusual toughness and clarity. As shown in Table 15.7, the addition of glass fibers improves the heat resistance of PC but reduces the impact resistance it also reduces the clarity. PCs are hydrolyzed by water when large surfaces are available, but molded or extruded articles are resistant to water, aqueous salt solutions, and nonpolar solvents. However, because of hydrolyzable groups in the repeating units, PC is attacked by mineral acids and alkalis. 

When these are cooked together, maleic anhydride isomerizes to fumaric acid, and they condense to form low-molecular-weight propylene fiimarate phthalate copolyester oligomers. These are mixed with styrene monomer, reinforced by glass fibers, usually extended with low-cost fillers, and cured by peroxide to form rigid strong products which are very resistant to impact and heat (Table 15.20). 

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