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| Titel: |
DYNAMIC MECHANICAL STUDIES OF POLYURETHANE COMPOSITES FILLED WITH GLASS MICROFILLERS |
| Auteur: |
Chuang, Tsu-Hwang Yang, Thomas C. K. Chang, An-Hwa |
| Verschenen in: |
International journal of polymeric materials |
| Paginering: | Jaargang 53 (2004) nr. 5 pagina's 465-474 |
| Jaar: |
2004-05 |
| Inhoud: |
Ceramic microspheres with unique composition and diameter, modified by different surface treatments, were blended with polyurethane (PU) in various proportions to improve the visco-elastic and mechanical properties of PU composites. Results of dynamic mechanical spectra indicate that the introduction of micro-beads H50, D32 and K37 into the PU network leads to the shift of glass transition temperature. Besides, the intensity of loss tanĪ“ of PU composites decreased as a function of the filler's concentration, due to reduced concentration of polymer backbones. Both the shift of Tg as well as the changes of loss tanĪ“ show that the introduction of microspheres not only creates physical bonding with PU but also causes steric effects due to the adsorption of N-H and C=O functional groups of PU on the filler surface. However, the introduction of various microfillers shows the composites to have different Young's modulus. This evidence shows that the rigidity and elasticity of polymer composite can be finely tuned by the introduction of various surface-treated microfillers as well as the amount of filler added. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 8 van 37 gevonden artikelen
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