Variable‐Temperature Rheo‐Optical Fourier Transform Infrared Spectroscopy of PolymersThis article is based in part on the previous version of the article by A.K. Kalkar, H.W. Siesler, I. Zebka, F. Pfeifer, A. Ameri, S. Michel and U. Hoffmann
| Autor: | G. G. Hoffmann, Heinz W. Siesler, Mansour Zahedi, Frank Pfeifer, O. Kolomiets |
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| Rok vydání: | 2001 |
| Předmět: |
chemistry.chemical_classification
Materials science Polymer Elastomer Poly(methyl methacrylate) law.invention chemistry.chemical_compound symbols.namesake Fourier transform Chemical engineering chemistry law visual_art Polymer chemistry symbols visual_art.visual_art_medium Crystallization Fourier transform infrared spectroscopy Methyl methacrylate Polycarbonate |
| Zdroj: | Handbook of Vibrational Spectroscopy |
| DOI: | 10.1002/9780470027325.s6201.pub2 |
| Popis: | This chapter describes the experimental principle and the basic theory of rheo-optical Fourier Transform Infrared (FT-IR) and Fourier Transform Near Infrared (FT-NIR) spectroscopy for the characterization of transient microstructural changes during polymer deformation and stress relaxation. To demonstrate the high potential and the versatility of these techniques the data obtained with selected polymer systems are analyzed and discussed in some detail. In poly(dimethylsiloxane)/polycarbonate (PDMS/PC) block copolymers, for example, depending on the composition, the block length and the experimental temperature, different orientational, and recovery phenomena have been observed for the hard (PC) and soft (PDMS) segments. Furthermore, the strain-induced crystallization of a poly(etherurethaneurea) elastomer system has been successfully monitored during cyclic elongation and recovery. The versatility of the method has also been demonstrated for the characterization of orientation and orientational relaxation in bimodal blends of poly(methyl methacrylate) (PMMA). Finally, orientation and crystallization changes occurring during poly(ethylene terephthalate) (PET) film production are discussed in detail. Keywords: FT-IR and FT-NIR spectroscopy; polymer orientation and relaxation; rheo-optical measurements; poly(dimethylsiloxane)/polycarbonate blockcopolymers; polyurethanes; poly(ethylene terephthalate); poly(methyl methacrylate) |
| Databáze: | OpenAIRE |
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