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Studies on structurally different diamines and bisphenol benzoxazines
- Source :
- High Performance Polymers. 28:466-478
- Publication Year :
- 2015
- Publisher :
- SAGE Publications, 2015.
-
Abstract
- The compounds resorcinolbisbenzoxazine, quinolbisbenzoxazine, p-phenylene diaminebisbenzoxazine, and m-phenylenediaminebisbenzoxazine are prepared. The structural and thermal characterizations of the materials are done using Fourier transform infrared spectroscopy (FTIR), proton nuclear magnetic resonance (1H NMR) and 13C NMR, and differential scanning calorimetry. Both FTIR and NMR studies reveal the presence of oxazine rings in the synthesized monomers. The curing exotherm of these bisbenzoxazines is much influenced by the nature of the aromatic unit present in the chosen compound and also on the type of the benzoxazine unit in the system. Curing kinetics is performed using Flynn–Wall–Ozawa, Vyazovkin, and Friedman methods. The apparent activation energies ( Ea-C) for the thermal curing of the synthesized monomers varied and are dependent on the nature and the position of the functional groups present in the compound. The highest Ea-C values are noted for the compounds having the functionalizations being para oriented.
- Subjects :
- Polymers and Plastics
Bisphenol
Organic Chemistry
Kinetics
02 engineering and technology
Carbon-13 NMR
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
0104 chemical sciences
chemistry.chemical_compound
Monomer
Differential scanning calorimetry
chemistry
Polymer chemistry
Materials Chemistry
Proton NMR
Organic chemistry
Fourier transform infrared spectroscopy
0210 nano-technology
Curing (chemistry)
Subjects
Details
- ISSN :
- 13616412 and 09540083
- Volume :
- 28
- Database :
- OpenAIRE
- Journal :
- High Performance Polymers
- Accession number :
- edsair.doi...........08d79dd4ea75ea115b241308e7bcd26a