HIGH TEMPERATURE POLYMERS: H-FILM AND SP-POLYMER.
PRINCETON UNIV N J FRICK CHEMICAL LAB
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A study was made of a new family of polyimide polymers H-Film and SP-Polymer which have reasonable thermal stability up to 400C in air. It was found that they show no glass transition temperature and no melting point over the entire temperature range to 500C. The viscoelastic properties reported here are different from those of any polymers studied up to now. Since their molecular structure is reasonably well known, there is reason to believe that other polymers of the stiff chain type will show similar viscoelastic properties. The lack of aliphatic hydrogen makes these polymers peculiarly resistant to oxidation. This feature can also be duplicated in similar families of polymers. These polymers indicate that very great thermal stability and relatively temperature insensitive viscoelastic properties can be achieved by organic polymers. Author