Pyrolysis of poly(phenylene vinylene)s with polycaprolactone side chains

Date

2008-05-01

Author

Nur, Yusuf
Çolak, Demet
Cianga, Ioan
Yagci, Yusuf
Hacaloğlu, Jale

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The thermal degradation characteristics of a new macromonomer poly(epsilon-caprolactone) with central 4,4'-dicarbaldehyde terphenyl moieties and poly(phenylene vinylene)s with well defined (E-caprolactone), (PPV/PCL) as lateral substituents were investigated via direct pyrolysis mass spectrometry. The unexpectedly high thermal stability of the macromonomer was attributed to intermolecular acetylation of benzaldehyde yielding a hemiacetal and causing a crosslinked structure during the pyrolysis. Increased thermal stability of the PCL chains was detected for all samples. The increase in stability of PCL chains was much more pronounced than was detected for poly(p-phenylene)-graft-poly(epsilon-caprolactone) copolymer (PPP/PCL); the upward temperature shift was about 100 degrees C for PPV/PCL and only 20 degrees C for PPP/CL. This pronounced effect may be due to higher thermal stability of PPV compared to PPP and the decrease in steric hindrance for PPV with PCL side chains. (C) 2008 Elsevier Ltd. All fights reserved. Keywords

Subject Keywords

Poly(phenylene vinylene), Poly(epsilon-caprolactone), Thermal degradation, Pyrolysis mass spectrometry

URI

https://hdl.handle.net/11511/31657

Journal

Polymer Degradation and Stability

DOI

https://doi.org/10.1016/j.polymdegradstab.2008.02.004

Collections

Graduate School of Natural and Applied Sciences, Article

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Direct pyrolysis mass spectrometry studies on thermal degradation characteristics of poly(phenylene vinylene) with well-defined PSt side chains Nur, Y.; Çolak, Demet; Cianga, I.; Yagci, Y.; Hacaloğlu, Jale (2008-10-01) Thermal degradation characteristics of a new macromonomer polystyrene with central 4,4'-dicarbaldehyde terphenyl moieties and poly(phenylene vinylene) with well-defined polystyrene (PPV/PSt) as lateral substituents were investigated via direct pyrolysis mass spectrometry. A slight increase in thermal stability of PSt was detected for (PPV/PSt) and attributed to higher thermal stability of PPV backbone. It was almost impossible to differentiate products due to the decomposition of PPV backbone from those pro...
Thermal degradation of poly(p-phenylene-graft-ε-caprolactone) copolymer Nur, Yusuf; Yurteri, Seda; Cianga, Ioan; Yagci, Yusuf; Hacaloğlu, Jale (2007-01-01) The thermal degradation of poly (p-phenylene-graft-epsilon-caprolactone) (PPP), synthesized by Suzuki polycondensation of poly(E-caprolactone) (PCL) with a central 2,5-dibromo-1,4-benzene on the chain with 1,4-phenylene-diboronic acid, has been studied via direct pyrolysis mass spectrometry. The thermal degradation occurred mainly in two steps. In the first step, decomposition of PCL chains occurred. A slight increase in thermal stability of PCL chains was noted. In the second stage of pyrolysis, the decomp...
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Pyrolysis of polyphenylenes with PCL or/and PSt side chains Nur, Yusuf; Yurteri, Seda; Cianga, Ioan; Yagci, Yusuf; Hacaloğlu, Jale (2007-01-01) Thermal degradation characteristic of polyphenylenes is an important issue for developing a rational technology of polymer processing and applications. In this study, we discussed thermal degradation of polyphenylenes (PP) with poly(epsilon-caprolactone) (PCL) and/or PCL/polystyrene copolymers (PSt) prepared by combined controlled polymerization and cross-coupling processes via direct pyrolysis mass spectrometry. When PPgraft-PCL/PSt copolymers were considered, thermally less stabile PCL side chains decompo...
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Citation Formats

Y. Nur, D. Çolak, I. Cianga, Y. Yagci, and J. Hacaloğlu, “Pyrolysis of poly(phenylene vinylene)s with polycaprolactone side chains,” Polymer Degradation and Stability, pp. 904–909, 2008, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/31657.