Self-Photopolymerization of Poly(disulfide) Oligomers.

ABSTRACT: Base catalyst and oxidant are usually necessary to promote the polymerization of poly(disulfide) oligomers through oxidative coupling of the terminal SH groups into S-S bonds. In this study, we prove that self-polymerization of bifunctional (disulfide) oligomer films can take place in a matter of minutes under UVC irradiation (254 nm, 10.5 mW cm^-2). The resulting insoluble polymer is characterized using solid-state NMR, ¹H T² NMR relaxation measurements, thermal analysis, and Fourier-transform infrared spectroscopy and proves to have similar composition as a model poly(disulfide) prepared under oxidative conditions, but distinct physical properties. These differences are explained by a change in polymer architecture due to a higher ratio of cyclization rela

SUBMITTER: Chemtob A 

PROVIDER: S-EPMC6647947 | biostudies-literature | 2019 Mar

REPOSITORIES: biostudies-literature