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- Title
Polyurethane/Soya Protein Isolate Green Composites: Spectral, Microstructural, Thermal, Swelling, and Biodegradation Behaviors.
- Authors
Madhukar, B. S.; Bhadre Gowda, D. G.; Hemalatha, K.; Somashekar, R.; Siddaramaiah,
- Abstract
ABSTRACT: A series of polyurethane (PU) green composites were synthesized with varying amounts, viz. 0, 2, 4, 8, and 12 wt% of soya protein isolate (SPI). Formation of the urethane linkage in the prepared green composites is revealed by infrared spectroscopy. The glass transition temperature (<italic>T</italic>g) of the fabricated PU/SPI composites has been evaluated by differential scanning calorimeter. Thermal stability and degradation analysis of the PU/SPI composites have been performed using a thermogravimetric analyzer (TGA). TGA thermograms clearly revealed that the fabricated composites were thermally stable upto 181°C and show a three‐step of thermal degradation. The water uptake behaviors of PU/SPI systems have been studied at different chemical environments such as distilled water, salt solution, acidic and alkaline solutions. The microcrystalline parameters such as crystallite size (〈<italic>N</italic>〉) and surface weighted crystal size (<italic>Ds</italic>) have been evaluated from wide‐angle X‐ray scattering profiles using two different asymmetric distribution functions. PU/SPI green composites were subjected to biodegradation in the presence of <italic>Aspergillus niger</italic>. The structure–property response of the PU/SPI green composites has been established on the basis of these parameters.
- Subjects
POLYURETHANES; SOY isolate fiber; ASTERACEAE; BIODEGRADATION; CHEMICAL decomposition
- Publication
Advances in Polymer Technology, 2018, Vol 37, Issue 2, p399
- ISSN
0730-6679
- Publication type
Article
- DOI
10.1002/adv.21679