Thermal degradation kinetics of structurally diverse poly(bispropargyl ethers-bismaleimide) blends

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• 作者：Jeyaraj Pandiyan Dhanalakshmi…
• 关键词：Bispropargyl ethers ; Bismaleimide ; TG ; Degradation kinetics ; TG ; FTIR
• 刊名：Chinese Journal of Polymer Science
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：34
• 期：3
• 页码：253-267
• 全文大小：745 KB
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• 作者单位：Jeyaraj Pandiyan Dhanalakshmi (1)
  Mahendran Arunjunai Raj (2)
  Chinnaswamy Thangavel Vijayakumar (3)
  
  1. Department of Chemistry, Kamaraj College of Engineering and Technology, S.P.G.C. Nagar, K. Vellakulam, 625701, India
  2. Wood Carinthian Competence Centre, Kompetenzzentrum Holz GmbH, Klagenfurterstrasse 87-89, A-9300, St, Veit an der Glan, Austria
  3. Department of Polymer Technology, Kamaraj College of Engineering and Technology, S.P.G.C. Nagar, K. Vellakulam, 625701, India
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Condensed Matter Physics
  Industrial Chemistry and Chemical Engineering
  Polymer Sciences
  Characterization and Evaluation of Materials
  
• 出版者：Chinese Chemical Society and Institute of Chemistry, CAS, co-published with Springer
• ISSN：1439-6203

文摘

Structurally diverse bispropargyl ethers using resorcinol, quinol, 4,4′-dihydroxy biphenyl, bisphenol-A, 4,4′- dihydroxy diphenyl ketone, 4,4′-dihydroxy diphenylsulphone, trimethyl indane bisphenol and tetramethyl spirobiindane bisphenol were prepared by using phase transfer catalyst. Synthesized materials were separately blended with 4,4′-bismaleimido diphenyl methane (BMIM) in mole ratios (0.5:0.5). The materials were thermally cured and the structural characterisation and the thermal properties of these cross-linked materials are investigated using Fourier-transform infrared (FTIR) spectrophotometer and thermogravimetric analyzer (TGA). Among the different materials investigated polyMRPE, polyMBPEBPA and polyMSPE show higher onset degradation temperature of 300 °C indicating higher thermal stability. The degradation kinetics is investigated using Flynn-Wall-Ozawa (FWO), Vyazovkin (VYZ) and Friedman (FRD) methods. Amongst the various cured materials investigated, the activation energy (Ea-D) values obtained for polyMRPE and polyMKPE were observed to increase continuously from α = 0.2 to 0.8 and the values range from 199 kJ/mol to 245 kJ/mol and 153 kJ/mol to 295 kJ/mol respectively. The crosslinked materials resulting from these bispropargyl monomers definitely need more energy for bond cleavage due to the presence of more aromatic units. The volatile products obtained during the thermal degradation of the polymers were analyzed using thermogravimetric-Fourier transform infrared analyses (TG-FTIR). The phenols, substituted phenols, carbon monoxide, carbon dioxide and small amount of aniline were found to be the major products during thermal degradation of these cured blends.