Excimer formation and energy migration in polymers

Biteman, V. B.; Gunder, O.A.; Petrova, I. B.; Senchishin, V.

doi:10.1007/bf00608392

Cited by 3 publications

(1 citation statement)

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“…A lower resolution in this case originated from quenching processes, or from the formation of an excimer or an exciplex. 21 The analysis of emission spectra of the model analog compounds further revealed significant insight about the origin of the emission peaks in SMPU. Recall that N-methyl urethane and phenyl urethane were selected to represent the hard segments of SMPU.…”

Section: Analysis Of Filler-polymer Interactions Using Fluorescence Ementioning

confidence: 98%

Analysis of non-covalent interactions between the nanoparticulate fillers and the matrix polymer as applied to shape memory performance

et al. 2010

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Non-covalent interactions between filler particles and polyurethanes were investigated using fluorescence emission spectroscopy. The results were used in the analysis of shape memory (SM) performance of polyurethanes. Composites of shape memory polyurethane (SMPU) and carbon nanofiber (CNF), oxidized carbon nanofiber (ox-CNF), organoclay, silicon carbide, and carbon black were prepared from diphenylmethane diisocyanate, 1,4-butanediol, and poly(caprolactone)diol. It was revealed by fluorescence emission spectroscopy that primarily the urethane groups located in the hard segments of SMPU interacted with the polar functional groups on filler particles. A close correlation between the extent of non-covalent filler-matrix interactions, soft segment crystallinity, and SM properties of polyurethane composites was discussed. It was observed that weak non-covalent interactions of polymer chains with CNF and SiC particles caused significant reductions in soft segment crystallinity of SMPU and hence the shape memory properties of the composites.

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Section: Analysis Of Filler-polymer Interactions Using Fluorescence Ementioning

confidence: 98%