Synthesis and Properties of Acetylene Terminated Aryl-Ether Oligomers
A substantial effort in this laboratory has been directed toward the synthesis and characterization of acetylene terminated oligomers for use as addition-curable, moisture-resistant, thermoset systems. Early work on the acetylene-terminated phenylquinoxalines1’2 demonstrated the moisture insensitivity of the product generated from the thermal cure. Studies of various difunctional acetylene-terminated monomers has demonstrated3 that the polymerization is a free radical propogation of the acetylene moiety to a linear conjugated polyene. The kinetic chain length of this reaction is unusually short (6–8 acetylene units) and termination is first order.
KeywordsIsothermal Aging Anhydrous Potassium Carbonate Phenyl Sulfone Thermal Mechanical Property Differential Scanning Colorimetry
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