Characterization of Electroinitiated and Radiation Polymerized Poly(Butadiene Sulfone)

Abstract

Polymerization of butadiene sulfone was accomplished by using two different methods. The first method involves electrochemical polymerization of the monomer using the constant potential electrolysis technique. Oxidation of the monomer under nitrogen atmosphere in an acetonitrile-tetrabutylammonium tetrafluoroborate system yields brown, tarry polymers. On the other hand, the second initiation method, which was radiation polymerization, yields white, powdery polymers. Structural analyses of the two 329 Copyright 0 1991 by Marcel Dekker, Inc. Downloaded by [University of California, San Diego] at 16:35 28 June 2016 330 HACIOGLU ET AL.polymers by various spectroscopic methods suggest a structure consisting of two different units in different proportions.

Protein Substitution Affects Glass Transition Temperature and Thermal Stability

“…For AA, it was through hydrogen bonding interactions forming AA dimers , . For BS and MA, it was through cross-linking across the CC bond in the ring − . These interactions, along with the ring structure of BS and MA, maintained the high glass transition temperature of the protein even though the native protein structure was disrupted.…”