Influence of shrinkage of polymer on the stationarity of propagation of frontal polymerization heat waves
| Autor: | Anahit Z. Varderesyan, Armenuhi G. Ketyan, S. P. Davtyan, A.O. Tonoyan, Aram H. Minasyan |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
chemistry.chemical_classification
Materials science Polymers and Plastics General Chemical Engineering Industrial chemistry 02 engineering and technology Polymer Heat wave 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences chemistry Polymerization Chemical engineering Materials Chemistry 0210 nano-technology Shrinkage |
| Zdroj: | Journal of Polymer Engineering. 39:769-773 |
| ISSN: | 2191-0340 0334-6447 |
| DOI: | 10.1515/polyeng-2019-0160 |
| Popis: | The purpose of this work was to study the causes of the formation of nonlinear and spin modes in the process of frontal polymerization (FP). The latter is an autowave process of the propagation of polymerization heat waves, and is a nontraditional method for the synthesis of various polymers and polymeric composites. Monomers of metal-complexes of acrylamide with and without additions of inert and nano-fillers were chosen as objects of study. Research data on dilatometric analysis, as well as on kinetics and macrokinetics of the polymerization processes of the monomers in frontal mode are presented. On the basis of the results obtained, a conclusion was drawn on the stability loss and transition boundary from a stationary mode to nonstationary one during FP. It was shown that, during the polymerization processes, shrinkage of the resulting polymer composites occurs, commensurate with the phase of the heat wave oscillations, which disturbs the propagating heat waves from layer to layer and violates the stationarity of the process. This, in turn, results in the formation of spin-like rings and a nonstationary mode of FP. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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