Abstract
The thermally induced random coil-to-helix conformational transition of poly- 7-benzyl-L-glutamate (PBG) in dichloroacetic acid (DCA)—chloroform, DCA-1,2-dichloroethane (DCE), and DCA-l,1,2,2-tetrachloroethane (TCE) mixtures has been studied as a function of solvent composition. The experimental data were obtained using the Perkin—Elmer DSC-2 differential scanning calorimeter with a modified sample container. Results of a systematic investigation of the transition temperature and the heat of transition in the above solvent systems are presented. The data are interpreted in terms of current theory.
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