Abstract
Abstract Three monomer pairs were used to examine the effect of increasing backbone stiffness on material properties. Bisphenol F, resorcinol, and 2,7-dihydroxynaphthalene and their diglycidyl ether analogs of increasing stiffness were chosen for ease of processing and to avoid the complicating influences of steric hindrance, polar interactions between chains, and liquid crystallinity. Oligomeric precursors were solution polymerized to insure stoichiometric imbalance-determined crosslink density. The Tg s of the Bisphenol F, resorcinol, and 2,7-dihydroxynaphthalene LXTs are 56, 67, and 105°C, respectively, by DSC. The modulus of the Bisphenol F and resorcinol LXTs are 3.04 and 3.47 GPa, respectively.
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