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2005 | 3 | 1 | 53-62
Article title

Thermal behavior of some aromatic copolyethers containing a propylenic spacer

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EN
Abstracts
EN
The main objective of this paper is to study the thermal stability of some aromatic copolyethers containing a propylenic spacer. Some of the investigated copolyethers displayed a liquid crystalline (LC) behavior, with the presence of the mesogenic groups in the main chain, inducing high values of the thermal transition temperatures. As a consequence, a thermal stability study was necessary to establish the maximum temperature value for the LC behavior characterization. A thermal degradation mechanism is proposed, taking into consideration the azobenzenic unit as the weakest link in the polymer chain and thus, the starting point of the thermal degradation process. The degradation mechanisms were correlated with the chemical structure and the polarity and conformation of the chains. Conformational analysis was performed using molecular simulations. Freeman-Caroll and Coats-Redfern methods were used to calculate some kinetic characteristics.
Publisher
Journal
Year
Volume
3
Issue
1
Pages
53-62
Physical description
Dates
published
1 - 3 - 2005
online
1 - 3 - 2005
References
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  • [2] S. Alazaroaie, V. Toader, I. Carlescu, K. Kazmierski, D. Scutaru, N. Hurduc and C.I. Simionescu: “Liquid Crystallyne Polymers. 14. Synthesis and Thermal Behaviour of Some Polyethers Containing Azo-mesogens”, Eur. Polym. J., Vol. 39, (2003), pp. 1333–1339. http://dx.doi.org/10.1016/S0014-3057(03)00002-8[Crossref]
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  • [12] A. Tarus, N. Hurduc, O. Catanescu, C. Cobzaru and N. Hurduc: “Phase Transfer Catalysis in Polycondensation Processes XXIV. On the Thermal Stability of Some Aromatic Polyethers Containing a Propylenic Spacer”, Polym. Degrad. Stab., Vol. 68, (2000), pp. 87–91. http://dx.doi.org/10.1016/S0141-3910(99)00169-X[Crossref]
  • [13] A. Creanga, G. Pokol, N. Hurduc, Cs. Novak, S. Alazaroaie and N. Hurduc: “Thermal behavior and primary degradation mechanism of some aromatic polyethers with semiflexible chain”, J. Therm. Anal. Cal., Vol. 66, (2001), pp. 859–868. http://dx.doi.org/10.1023/A:1013108625929[Crossref]
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Document Type
Publication order reference
YADDA identifier
bwmeta1.element.-psjd-doi-10_2478_BF02476237
Identifiers
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