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Investigation Of Condensation Type Elastomers

Report Number: WADC TR 55-221 Part 2
Author: Schweiker, George C.
Author: Deleo, Ruolph N.
Author: White, Russell R.
Corporate Author: Hooker Electrochemical Company
Laboratory: Materials Laboratory
Date of Publication: 1956-05
Pages: 71
Contract: AF 33(616)-2421
Project: 7340
Task: 73404
AD Number: AD0101728

The ultimate goal of the exploratory investigations described is the development of a rubber for special Air Force applications. High thermal stability (350 F or higher); resistance to aromatic fuels, synthetic ester base oils and hydraulic fluids; resistance to ozone and to weathering oxidation effects; resistance to acids, bases, and salts; resistance to abrasion; and satisfactory performance at -65 F or lower are major requirements for such an elastomer. To this end, a number of linear polyesters have been prepared from fluorine containing diols and various dicarboxylic acid chlorides, and their properties determined. Hexafluoropentylene adipate (made from adipyl chloride and 2,2,3,3,4,4-hexafluoropentanediol) is a rubber-like gum when of sufficiently high molecular weight, and this polyester has been crosslinked to evaluate the properties of the elastomer in the light of Air Force requirements.

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