Polyurethane-nitrile rubber blends

Citation
S. Desai et al., Polyurethane-nitrile rubber blends, J MACR S PU, 38(7), 2001, pp. 711-729
Citations number
24
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
JOURNAL OF MACROMOLECULAR SCIENCE-PURE AND APPLIED CHEMISTRY
ISSN journal
1060-1325 → ACNP
Volume
38
Issue
7
Year of publication
2001
Pages
711 - 729
Database
ISI
SICI code
1060-1325(2001)38:7<711:PRB>2.0.ZU;2-K
Abstract
Polyurethane (PU)/nitrile rubber (NBR) blends of different compositions wer e prepared by a combination of solution blending and mastication process. T he thermal, mechanical, dynamic mechanical, and morphological properties in dicated synergistic behavior of the two components. Incorporation of NBR in PU showed an increase in the % elongation, thermal stability and solvent r esistance of the PU network, while the PU network could attribute improved tensile strength to NBR. The blend rich in PU exhibited optimum tensile str ength, whereas the blends rich in NBR exhibited optimum % elongation at bre ak. Morphology revealed that the minor component was dispersed in the major continuous phase. DMA showed the existence of two separate glass transitio ns. The loss tangent plots showed inward shift of the two peaks with increa sing the NBR content indicating increasing miscibility. The increase in car bon black content in blends increased the stress-strain properties up to so me extent.