NDLI: Magnetic and optical properties of poly(diacetylene) block copoly (ether-urethanes) containing nitroxyl spin-labels in tfee main chain

Content Provider	IEEE Xplore Digital Library
Author	Shchegolikhin, A.N. Yakovleva, I.N. Motyakin, M.V.
Copyright Year	1994
Description	Author affiliation: Institute of Chemical Physics (Shchegolikhin, A.N.)
Abstract	Summary form only given. Segmented block-co-poly(ether-urethane-diacetylenes) of the general formula: where X = -(CH2)6-, have been prepared, characterized, and polymerized. Conceptually, such macromonomers have been designed to facilitate a combined probing of structural and electronic dynamics relevant to the poly(diacetylene) phase of the resulting 3D cross-linked composite. Thermally induced structural and electronic transformations in the UV- or g-cross-linked composites have been investigated by DSC and optical methods, while correlating the results with the spin probe dynamics data obtainable by parallel ESR measurements. It is shown that, besides being of significant help during studies of phase separation phenomena by DSC and optical methods, the ESR spin probe dynamics data add clarity to corresponding data for thermochromic transitions in these composites obtainable by FTIR, UV/VIS and NIR-FT- Raman. It is shown also that the presence of high concentrations of a spin probe in a block copolymer does not inhibit polymerization of DA-fragments in crystalline or para-crystalline domains, provided proper molecular design and phase segregation had been attained.
Starting Page	64
Ending Page	64
File Size	88821
Page Count	1
File Format	PDF
DOI	10.1109/STSM.1994.834744
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1994-07-24
Publisher Place	Korea
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Paramagnetic resonance Magnetic separation Crystallization Probes Chemicals Physics Magnetic properties Optical polymers Thermochromism
Content Type	Text
Resource Type	Article

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