Ultrasonic and thermal properties of γ-irradiated low-density polyethylene
Author | Zahran, R. R. |
Author | Kandeil, A. Y. |
Author | Higazy, A. A. |
Author | Kassem, M. E. |
Available date | 2015-11-05T06:57:47Z |
Publication Date | 1993 |
Publication Name | Applied Polymer Science |
Resource | Wiley Online Library |
Citation | Zahran, R. R., Kandeil, A. Y., Higazy, A. A. and Kassem, M. E. (1993), Ultrasonic and thermal properties of ?-irradiated low-density polyethylene. J. Appl. Polym. Sci., 49:�1291�1297 |
ISSN | 1097-4628 |
Abstract | The ultrasonic pulse-echo technique and differential thermal analysis were utilized to characterize and to monitor the effect of ?-irradiation on the sonic modulus and the heat effect of low-density polyethylene. The sonic wave velocity, sonic modulus, and specific gravity exhibit a minimum for samples irradiated at 10 Mrad. A minimum in the heat capacity was observed at 1 Mrad. The estimated relative change of the activation energy of ordering exhibits a minimum at 100 Mrad. Below 10 Mrad, the perturbation and the loss of the crystalline phase override the effect of radiation cross-linking. From 10 to 100 Mrad, the effect of cross-linking as well as that of crystallinity are prevailing. Oxidative degradation is dominating above 100 Mrad. |
Language | en |
Publisher | John Wiley & Sons, Inc. |
Subject | Ultrasons Polyethylene. γ-irradiated |
Type | Article |
Pagination | 1291–1297 |
Issue Number | 7 |
Volume Number | 49 |
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Chemical Engineering [1155 items ]