High performance fibers aromatic polyester fiber

Isayev A I (1991) Wholly aromatic polyester fiber-reinforced high performance thermoplastic and process for preparing same, U.S. Patent 5,006,402, Can Patent 2,013,527 (1991) Eur Patent EP 0 423 311, Austr Patent 633,580 (1992), Int Appl WO 90/13421. 

Aromatic polyesters show good performance and have high T and HOT (see Table 1.62). Polyethyleneterephthalate (PET) was invented in 1941 and commercialized as Terylene fibers. The catalytic transesterification also lead to PPT, PBT, PHMT, PEN, etc. Polybutylene-terephthalate... 

Nylon, polyester (unsaturated) and, currently, aromatic Nylons (aramides) like Kevlar. High-performance (and expensive) reinforcing fillers include carbon (mainly graphite) fibers, alumina, silicon, carbide, nitrite, boron, beryllium and other metals. Producing extremely high strength and stiffness, these specific fibers have been developed for space, aviation and military use. 

The novel fibers serve as reinforcement for special performances like endurance at high temperatures and premium mechanical properties. They consist of aromatic polyesters and polyamides, polyimides and other high-performance polymers. Most distinguished are Kevlar , Nomex , Ekonol and PEEK . 

The primary motivation for industrial participation in the development of liquid crystalline polymers was the search for high performance tensile properties, i.e., fiber tensile strength and modulus. As it later turned out, the wholly aromatic, thermotropic polyesters were found to offer a great many more useful properties than just their now well-known tensile capabilities. 

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