Aromatic Polyamide Flammability

In the 1960s aromatic polyamides were developed to improve the flammability and heat resistance of nylons. Poly( 3-pheEyleneisophthalamide), or Nomex, is a highly heat resistant cylon obtained from the solution or interfacial polymerization of a metasubstituted diacid chloride and a diamine (Equation 2.36). 

The term aramid is used to describe aromatic polyamides, which were developed to improve the heat and flammability resistance of nylon. Nomex is a highly heat-resistance nylon introduced in 1961 by DuPont. It is produced by the solution or interfacial polymerization of isophthaloyl chloride and 7M-phe-nylenediamine ... 

Another crucial factor consists of flame resistance. Except for outstanding polymers like fluoro compoimds, Noryl, or aromatic polyamides, it is well known that most polymers based on organic compoimds bum well. (There have been many attempts to synthesize non-flammable inorganic polymers, but with minor commercial success.) However, there are polymers that are considered to be "self extinguishing" (more or less) such as PVC and others. 

Aramid ar-9-m9d, - mid [aromatic polyamide] (1972) n. Acronym for aromatic polyamide, currently available in fiber foam only, having at least 85% of the amide groups bonded to two aromatic rings. DuPont s Kevlar is poly(p-phenylene ter-ephthalamide). Aramid fibers exhibit low flammability, high strength, and high... 

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