Synthesis of novel cyclosiloxane monomers containing push-pull moieties and their anionic ring opening polymerization.

ABSTRACT: The synthesis of three novel tetracyclosiloxane monomers modified either with a nitroaniline (NA) or with a Disperse Red 1 (DR1) push-pull group and their ring opening polymerization reaction in the presence of tetramethylammonium hydroxide are presented. The prepared monomers and polymers were characterized by different spectral methods and gel permeation chromatography. For the crystalline monomers, the structures were further proven by single crystal X-ray diffraction. Dynamic scanning calorimetry shows that the polymers that carry NA groups have a glass transition temperature (T _g) well below room temperature (RT), while the one that carries DR1 groups melts at 55 °C. The transition temperatures have a strong effect on permittivity as indicated by broadband impedance

SUBMITTER: Perju E 

PROVIDER: S-EPMC9078476 | biostudies-literature | 2018 Feb

REPOSITORIES: biostudies-literature