Epoxy-Glass Microballoon Syntactic Foams: Rheological Optimization of the Processing Window
In this paper, we discuss the chemorheology of epoxy based syntactic foams containing glass microballoons of varying density, with an aim of establishing the effect of microballoon loading on its processability. The primary objective is to determine the maximum microballoon loading that disperses un...
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Advances in Polymer Technology |
| Online Access: | http://dx.doi.org/10.1155/2019/9180302 |
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| author | A. V. Ullas Devendra Kumar Prasun Kumar Roy |
| author_facet | A. V. Ullas Devendra Kumar Prasun Kumar Roy |
| author_sort | A. V. Ullas |
| collection | DOAJ |
| description | In this paper, we discuss the chemorheology of epoxy based syntactic foams containing glass microballoons of varying density, with an aim of establishing the effect of microballoon loading on its processability. The primary objective is to determine the maximum microballoon loading that disperses uniformly in the resin without the aid of any diluent. The viscosity and dynamic mechanical properties of epoxy formulations containing varying amounts of glass microballoons were established by parallel plate rheometry. Our studies reveal that solventless processing of formulations with microballoon loading > 60% poses practical difficulties due to prohibitively high viscosities, although a packing efficiency of 74% is theoretically allowed in the case of hexagonal close packing. The presence of microballoons does not alter the curing mechanism. The mechanical properties of syntactic foams were inversely proportional to the loading and type of glass microballoons. |
| format | Article |
| id | doaj-art-427d08ef84a34c8c8ca52d04820eb13e |
| institution | Kabale University |
| issn | 0730-6679 1098-2329 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Polymer Technology |
| spelling | doaj-art-427d08ef84a34c8c8ca52d04820eb13e2025-02-03T06:14:10ZengWileyAdvances in Polymer Technology0730-66791098-23292019-01-01201910.1155/2019/91803029180302Epoxy-Glass Microballoon Syntactic Foams: Rheological Optimization of the Processing WindowA. V. Ullas0Devendra Kumar1Prasun Kumar Roy2Centre for Fire, Explosive and Environment Safety, DRDO, Timarpur, Delhi 110054, IndiaDepartment of Applied Chemistry and Polymer Technology, Delhi Technological University, Delhi 110042, IndiaCentre for Fire, Explosive and Environment Safety, DRDO, Timarpur, Delhi 110054, IndiaIn this paper, we discuss the chemorheology of epoxy based syntactic foams containing glass microballoons of varying density, with an aim of establishing the effect of microballoon loading on its processability. The primary objective is to determine the maximum microballoon loading that disperses uniformly in the resin without the aid of any diluent. The viscosity and dynamic mechanical properties of epoxy formulations containing varying amounts of glass microballoons were established by parallel plate rheometry. Our studies reveal that solventless processing of formulations with microballoon loading > 60% poses practical difficulties due to prohibitively high viscosities, although a packing efficiency of 74% is theoretically allowed in the case of hexagonal close packing. The presence of microballoons does not alter the curing mechanism. The mechanical properties of syntactic foams were inversely proportional to the loading and type of glass microballoons.http://dx.doi.org/10.1155/2019/9180302 |
| spellingShingle | A. V. Ullas Devendra Kumar Prasun Kumar Roy Epoxy-Glass Microballoon Syntactic Foams: Rheological Optimization of the Processing Window Advances in Polymer Technology |
| title | Epoxy-Glass Microballoon Syntactic Foams: Rheological Optimization of the Processing Window |
| title_full | Epoxy-Glass Microballoon Syntactic Foams: Rheological Optimization of the Processing Window |
| title_fullStr | Epoxy-Glass Microballoon Syntactic Foams: Rheological Optimization of the Processing Window |
| title_full_unstemmed | Epoxy-Glass Microballoon Syntactic Foams: Rheological Optimization of the Processing Window |
| title_short | Epoxy-Glass Microballoon Syntactic Foams: Rheological Optimization of the Processing Window |
| title_sort | epoxy glass microballoon syntactic foams rheological optimization of the processing window |
| url | http://dx.doi.org/10.1155/2019/9180302 |
| work_keys_str_mv | AT avullas epoxyglassmicroballoonsyntacticfoamsrheologicaloptimizationoftheprocessingwindow AT devendrakumar epoxyglassmicroballoonsyntacticfoamsrheologicaloptimizationoftheprocessingwindow AT prasunkumarroy epoxyglassmicroballoonsyntacticfoamsrheologicaloptimizationoftheprocessingwindow |