|
| << vorige |
Tijdschrift beschrijving
Alle jaargangen van het bijbehorende tijdschrift
Alle afleveringen van het bijbehorende jaargang
Alle artikelen van de bijbehorende aflevering
Details van artikel 6 van 6 gevonden artikelen
| Titel: |
Viscoelastic and Ultimate Behaviour of Swollen Poly (2-hydroxyethyl methacrylate) Networks Filled with Poly (2-hydroxyethyl methacrylate) in the Rubbery Region |
| Auteur: |
Ilavska, M. Cerna, J. Bocek, B. Hrouz, J. |
| Verschenen in: |
International journal of polymeric materials |
| Paginering: | Jaargang 7 (1979) nr. 1-2 pagina's 93-109 |
| Jaar: |
1979-01-01 |
| Inhoud: |
Composite systems of the crosslinked and soluble poly(2-hydroxyethyl methacrylate) (PHEMA) matrix with various contents of crosslinked PHEMA particles containing 0.4, 1.0 and 20.0 wt. percent ethylenedimethacrylate as the crosslinking agent were prepared. Stress relaxations at the elongation λ = 1.1, stress-strain curves, Poisson's ratios, the degree of swelling and ultimate characteristics of samples swollen in water at 25°C were measured. With increasing filler content the time effects in the systems and the stress-at-break σb, and strain-at-break, σb, also increase; these results corroborate the viscoelastic concept of the ultimate behaviour. An agreement was found between the experimentally determined course of the initial modulus G0 and that predicted by Van der Poel as a function of the volume fraction of filler νf only for those systems in which the content of the crosslinking agent in the filler is smaller than in the matrix; systems with a higher content of the crosslinking agent in the filler than in the matrix require νf* = 3νf to fit the theory. Water present during the formation of filled systems preferentially swells the filler particles and reduces the polymerfiller interaction, which has a negative effect on the modulus G0 and on σb and εb. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 6 van 6 gevonden artikelen
| << vorige |