Klimov, Evgueni; Hoffmann, Guenter G.; Gumenny, Alexander; Siesler, Heinz W.:
Low-temperature FT-NIR spectroscopy of strain-induced orientation and crystallization in a poly(dimethylsiloxane) network.
2005
In: Macromolecular Rapid Communications, Jg. 26 (2005), Heft 13, S. 1093 - 1098
Artikel/Aufsatz in Zeitschrift2005Chemie
Titel:
Low-temperature FT-NIR spectroscopy of strain-induced orientation and crystallization in a poly(dimethylsiloxane) network.
Autor(in):
Klimov, Evgueni; Hoffmann, Guenter G.LSF; Gumenny, AlexanderLSF; Siesler, Heinz W.LSF
Erscheinungsjahr
2005

Abstract:

The mech. properties, morphol., and orientation of a poly(dimethylsiloxane) (PDMS) network have been studied during cyclic elongation and recovery by simultaneous Fourier-transform near-IR polarization spectroscopy at temps. ranging from room temp. to -40 DegC. Completely different orientation/recovery mechanisms and changes in the state of order of PDMS were detected as a consequence of cyclic loading/unloading with decreasing temp. The differences obsd. at -20 DegC compared to room temp. are explained in terms of conformationally regular chain segments, whereas the cooling to -40 DegC leads to the formation of lamellar crystals.