Influence of shrinkage of polymer on the stationarity of propagation of frontal polymerization heat waves
-
Anahit O. Tonoyan
,
Aram H. Minasyan
Abstract
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.
Acknowledgments
This work was supported by Science Committee of the Ministry of Education and Science of Armenia.
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©2019 Walter de Gruyter GmbH, Berlin/Boston
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Artikel in diesem Heft
- Frontmatter
- Material properties
- Chitosan as an emerging object for biological and biomedical applications
- Investigation of the properties of polystyrene-based wood plastic composites: effects of the flame retardant loading and magnetic fields
- An attempt to correlate the physical properties of fossil and subfossil resins with their age and geographic location
- Effect of heat treatment on the thermophysical properties of copper-powder-filled polycarbonate and polycarbonate containing paraffin
- Preparation and assembly
- Preparation of hydrophilic reactive polyurethane and its application of anti-water erodibility in ecological restoration
- Antimicrobial gelatin/sericin/clay films for packaging of hygiene products
- Functional sol-gel coated electrospun polyamide 6,6/ZnO composite nanofibers
- Influence of the incorporation of different chemically functionalized carbon nanotubes in polyurethane resin applied on aluminum
- Engineering and processing
- Influence of shrinkage of polymer on the stationarity of propagation of frontal polymerization heat waves
- Influence of titanium oxide-based colourants on the morphological and tribomechanical properties of injection-moulded polyoxymethylene spur gears
