By Sylvie Beland
Describes advancements in thermoplastic resins and their composites, and assesses the advantages and obstacles of rising fabrics for aerospace and different functions. dialogue contains the functionality of neat and non-stop fiber strengthened thermoplastic resins when it comes to their homes. additionally offers info on environmental and chemical resistance.
summary: Describes advancements in thermoplastic resins and their composites, and assesses the advantages and boundaries of rising fabrics for aerospace and different purposes. dialogue contains the functionality of neat and non-stop fiber bolstered thermoplastic resins when it comes to their houses. additionally offers details on environmental and chemical resistance
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Additional info for High Performance Thermoplastic Resins and their Composites
Flexural strength and modulus are also very PBI has the greatest surface hardness of any known molded thermoplastic with Rockwell M values greater than 125 and it has also the highest heat deflection temperature value for any available thermoplastic resin. The coefficient of linear thermal expansion is lower than for any non-liquid crystalline thermoplastic resin. However, the notched Izod impact strength is relatively low. PBI is the only polymeric matrix material capable of maintaining load bearing properties for short periods of time (3-5 min] at temperature up to 649’ C .
The processing Because of the high Tg. 5 x 10-s / ’ C for the composite Avimid N). the excellent thermal-oxidative stability of Avimid N and its resistance to thermal cycling, it is used in composite tooling to fabricate quality parts from thermoplastic prepregs such as Avimid K or APC-2 [2,36, 671. As shown in Figure 11 and Table 15. Avimid N has superior flexural strength and modulus along with a low specific gravity and coefhcient of thermal expansion compared to other tooling materials. 6 cm diameter filament wound pressure bottles have been produced successfully 1381in a joint program between EL DuPont and the Air Force Astronautics Laboratory @FAL).
1621. PEI Ultem is resistant to salt solutions, dilute bases, gasoline, aliphatic hydrocarbons, alcohols and mineral acids, but it is attacked by partially halogenated solvents such as methylene chloride or trichloroethane and Neat Thermoplastic strong bases . Resins Properties 45 Recently, GE introduced a new polyetherimide. Ultem 6000, which offers higher temperature resistance and higher chemical resistance especially to partially halogenated solvents. Cypac is the trade name of the polyetherirnide neat resin introduced by American Cyanamid Co.