Polyarylates

POLYARYLATES: Polyarylates are a family of thermoplastic aromatic polyesters. They are often produced by polycondensation of dicarboxylic acids or their diacid chloride derivatives with phenolic compounds. The dicarboxylic acid is usually terephthalic or isophthalic acids and the phenolic compound is Bisphenol A or a derivate of it.

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Polyarylates are a family of aromatic polyesters. The repeat units consists of ester groups (chemical formula -CO-O-) and aromatic rings. They are produced by polycondensation of a diacid chloride derivative of a dicarboxylic acid with a phenolic compound. The dicarboxylic acid is usually terephthalic or isophthalic acids and the phenol is Bisphenol A or a derivate of it. The bulky aromatic rings and the absence of methylene groups in the polymer backbone greatly stiffen the polymer chain by interfering with the rotation of the repeat units around the ester linkages. The two most common polyarylates are poly(-p-hydroxybenzoate) and polybisphenol-A terephthalate. 

PROPERTIES

1. Excellent dimensional stability

2. Good warp resistance

3. Rigid strong and tough in nature

4. Good resistance to chemicals

5. Good flame retardance

6. High heat resistance

7. Transparent and excellent UV resistance

APPLICATIONS

Automotive

Lenses for automobile lamps, exterior glazing, reflectors, lamp housings, door handles, wind shield wipers and mirror housings

Electrical

Solar energy collector glazing, connectors relays, fuse covers, switches, coil formers/bobbins

Industrial

Automobile seals, rotors for pumps, fire shields, mixing light covers, fire helmets, safety equipment housings.

THERMO-PHYSICAL PROPERTIES

Poly(bisphenol-A-terephthalate)

Poly(bisphenol-A-isophthalate)