| Autor: |
S.G. Durgar'yan, Yu. P. Yampolskii, V. G. Filippova, N.K Gladkova |
| Rok vydání: |
1985 |
| Předmět: |
|
| Zdroj: |
Polymer Science U.S.S.R.. 27:2155-2164 |
| ISSN: |
0032-3950 |
| DOI: |
10.1016/0032-3950(85)90500-3 |
| Popis: |
The coefficients of diffusion, D , and permeability, P , of saturated and unsaturated C 1 –C 4 hydrocarbons have been measured in type AB and type BAB block-copolymers of vinyltrimethylsilane and hexamethylcyclotrisiloxane. The values of D and P rise rapidly as the siloxane concentration in the block-copolymer is increased. The curves for P and D as a function of composition are compared with the predictions of various morphological models of the block-copolymer. Features of the dependence of P and D on the block-copolymer's composition enable it to be postulated that the transfer of the various hydrocarbon molecules in a heterophase block-copolymer occurs by diverse diffusion paths. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
