Abstract
Simultaneous cross-linking and chain scission reactions that are induced by ionizing radiation have been simulated with a computer. These studies were performed for both bulk- and solution-cured poly(dimethylsiloxane) (PDMS) systems. Variations of network structures and mechanical properties that depend on the degree of cross-linking are presented. It is shown that radiation-cured networks are barely connected and contain large amounts of defect structures. More than 90% of the defects are found to be dangling ends, and isolated ends are dominant in this population. The weight fraction of loops is quite small, but they deplete a large fraction of the cross-links. These results are in good agreement with experiment and with other calculations. Potential correlations between network structures and the Mooney-Rivlin coefficients 2C1and 2C2 are also discussed.
Original language | English |
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Pages (from-to) | 2787-2793 |
Number of pages | 7 |
Journal | Macromolecules |
Volume | 19 |
Issue number | 11 |
DOIs | |
Publication status | Published - 1986 Jan 1 |
All Science Journal Classification (ASJC) codes
- Organic Chemistry
- Polymers and Plastics
- Inorganic Chemistry
- Materials Chemistry