|
|
|
|
|
|
Browse Articles |
|
|
|
|
|
Journal Links |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Sci. Lett. J. 2017, 5: 241
|
|
|
|
Research Article
|
|
|
|
|
|
|
Full Text
|
|
|
|
Studies on thermal degradation kinetics of structurally diverse polybispropargyl ethers
|
|
|
|
J. Dhanalakshmia, P. K. Vimalathithanb, C. T. Vijayakumarc
|
|
|
|
|
|
|
|
a Department of Chemistry, Kamaraj College of Engineering and Technology, S. P. G. C. Nagar, K. Vellakulam Post 625 701, India
b Department of Mechanics, Mathematics and Management, Politecnico di Bari, Viale Japigia 182, 70126 Bari, Italy
c Department of Polymer Technology, Kamaraj College of Engineering and Technology, S. P. G. C. Nagar, K. Vellakulam Post 625 701, India
|
|
|
|
|
|
|
|
Abstract |
|
|
|
Structurally diverse bispropargyl ethers using resorcinol (RPE), quinol (QPE), 4,4'-dihydroxy biphenyl (BPPE), bisphenol-A (BPEBPA), 4,4'-dihydroxy diphenyl ketone (KPE), 4,4'-dihydroxy diphenylsulfone (SPE), trimethyl indane bisphenol (IPE) and tetramethyl spirobiindane bisphenol (SPIPE) were synthesized and are thermally cured. The structural characterization and the thermal properties of these cured materials are investigated using Fourier Transform Infrared spectrophotometer and Thermogravimetric Analyzer. Among the various materials polyRPE, polySPE and polyIPE needed higher energy for thermal degradation. The degradation kinetics is investigated using Flynn-wall-Ozawa, Corrected Flynn-wall-Ozawa, Vyazovkin, Advanced Vyazovkin and Friedman methods. With increasing extent of reaction the apparent activation energy for degradation values for polyRPE was observed to increase continuously. The thermal degradation products of thermally cured materials were studied using TG-FTIR. The CO, CO2, phenols, substituted phenols and alkenes are the major volatiles evolved during the thermal degradation and the amount that is evolved is dictated by the structural features of the materials.
|
|
|
|
|
|
|
|
Keywords
|
|
|
|
Bispropargyl ethers; Thermogravimetry; Degradation kinetics; TG-FTIR
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|