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| Titel: |
Effect of the Composition of the Copolymers of 2-Hydroxyethyl Methacrylate and n-Butyl Methacrylate on the Parameters of the Low-Temperature Relaxation Motions of the Side Chains |
| Auteur: |
Kolasiak, J. |
| Verschenen in: |
International journal of polymeric materials |
| Paginering: | Jaargang 1 (1972) nr. 2 pagina's 125-131 |
| Jaar: |
1972-01-01 |
| Inhoud: |
The random copolymers of 2-hydroxyethyl methacrylate and n-butyl methacrylate were used to investigate the effect of the concentration of the side chains on the parameters of their low-temperature relaxation motions. The dynamic mechanical measurements were performed on a torsion pendulum at a frequency about 1 Hz in the temperature region from -196 to 20°C. The presence of the second component (up to a content of about 40% by weight) causes a decrease in the height and a deformation of the low-temperature loss maximum of the prevailing component, while the shift of the loss maximum on the temperature axis is not pronounced. Two loss maxima, analogous to the loss maxima of the homopolymers, appear only at compositions close to the equimolar composition; the sorbed water prevailingly affects the mobility of the 2-hydroxyethyl methacrylate side chains. The results indicate that the low-temperature relaxation motion of the side chains in polymethacrylates depends on the interaction of the individual side chains with their close surroundings, and not on the average composition of the copolymers. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
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