Abstract
X-Ray and dielectric measurements were carried out for films of D,L-alternating poly(γ-benzyl glutamate) (PBDLG) and poly(γ-phenethyl glutamate) (PPDLG). PBDLG exists in the α- and ω-helical conformations in films prepared by evaporating the solvent chloroform quickly and slowly, respectively. Both forms of PBDLG undergo an irreversible transition at 130—140°C to the πDL-helical structure specific to D,L-alternating polypeptides. PPDLG adopts the α-helical conformation, and it is transformed to the πDL conformation at 80—90°C. PPDLG exhibits the large dielectric dispersion due to side-chain motion. The dispersion of the ω form of PBDLG is very small in comparison with those of the α and πDL forms. The heat of transition and dielectric properties are discussed in terms of stacking of phenyl groups.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
