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| Titel: |
A New Structural Model of the Amorphous Polymer for the Description of Initiated Chain Reactions |
| Auteur: |
Mikheyev, Yu. A. |
| Verschenen in: |
International journal of polymeric materials |
| Paginering: | Jaargang 16 (1992) nr. 1-4 pagina's 221-235 |
| Jaar: |
1992-02-01 |
| Inhoud: |
The structural-physical bases of a kinetic description of chain reactions in amorphous polymers are presented. A model of the supermolecular “carcass-cellular” structure is formulated and discussed. The ways in which microheterogeneous elements of the polymeric body must act in the chain reaction are outlined. In the model, a special role is attached to the carcass cell which localizes within itself the molecules of admixed initiators. The carcass cell has the structure of a micelle. Its shell is composed of a mosaic of paracrystalline domains which are oriented with their planes along the micellar surface. In bulk polymer, the shell domains of adjacent micelles are coalesced to form the unified three-dimensional paracrystalline carcass. The portions of the polymer chain links, which are not included in the carcass, form the microporous spongy core within the cells. There are peculiarities connected with the structure of the intracellular sponge, which cause certain free radical processes initiated in the cell to be separated into coupled nonidentical reaction chains which are distributed among the intracellular microphases being formed. In addition, the reactional nonsteady state must appear if structural changes occur simultaneously in the spongy core. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 2 van 32 gevonden artikelen
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