The elasticity of polythene melts
- 1 July 1952
- journal article
- research article
- Published by Wiley in Journal of Polymer Science
- Vol. 9 (1) , 41-52
- https://doi.org/10.1002/pol.1952.120090103
Abstract
The elasticity of polythene melts was measured with a resonance method by inducing shear oscillations in the region about 30 cycles/second at small shear amplitudes. The experiments covered a temperature region of 130° to 230°C. and a range of (osmotic) molecular weights from 12,000–64,000. Shear moduli of the order 105 to 105 dyne cm.−2 were observed and a single relaxation time appeared sufficient to characterize the mechanical behavior of the polythene melts at a given temperature. The variation of mechanical parameters with temperature and molecular weight is brought into relation with known data on the amount of chain branching.Keywords
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