Left and right single‐handed helical polysilane (L‐HPS and D‐HPS) and racemic helical polysilane (R‐HPS) were synthesized by the Wurtz‐type coupling reaction. The chiral dichloro(methoxycarbonyl ethyl propyl ether)methylsilane monomers applied in copolymerization were derived from methyl d/l‐lactate. The obtained polymers were characterized by 1H and 13C nuclear magnetic resonance, Fourier transform infrared spectroscopy, ultraviolet–visible spectroscopy, circular dichroism spectroscopy, gel permeation chromatography and X‐ray diffraction. Infrared emissivity (IRE) values were also investigated. Compared to R‐HPS, L‐HPS, and D‐HPS, a pair of mirror image, showed higher crystallinity, better thermal stability, and lower IRE (8–14 mm) at the values of 0.592 and 0.576, respectively. The higher regular secondary structure of HPSs was attributed to the formation of intermolecular hydrogen bonds. To further study the configurations of L‐HPS, D‐HPS, and R‐HPS, rotational isomeric state scheme with molecular dynamics simulation have been utilized. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46335.
Journal of Applied Polymer Science – Wiley
Published: Jan 15, 2018
Keywords: ; ; ; ;
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