Characteristic exothermic behavior and short-range ordering in aggregates of ultimately fine fibers made of monodisperse polystyrene
We investigated the thermal behavior and structure formation of electrospun (ES) fiber mats and freeze-dried (FD) foams consisting of very fine fibrous network structure, and compared the results with those of self-standing membranes, in which the motion of boundary molecules is not restrained by co...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-09-01
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| Series: | Results in Materials |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590048X23000560 |
| _version_ | 1797683041278099456 |
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| author | Hanako Asai Yuuki Tanaka Satoshi Irie Kenji Hisada |
| author_facet | Hanako Asai Yuuki Tanaka Satoshi Irie Kenji Hisada |
| author_sort | Hanako Asai |
| collection | DOAJ |
| description | We investigated the thermal behavior and structure formation of electrospun (ES) fiber mats and freeze-dried (FD) foams consisting of very fine fibrous network structure, and compared the results with those of self-standing membranes, in which the motion of boundary molecules is not restrained by contacting solids. We chose monodisperse polystyrene (PS) as a material polymer to examine the molecular weight effect as well. For the ES fibers and FD foams, a characteristic exothermic peak was observed at around 110 °C in DSC curve at 1st scan, while such exothermic peak did not appear for the self-standing films and bulk. To further investigate the nano-periodic structure inside materials during heating, we carried out WAXD measurements. Although the PS used in this study was atactic, the ES fibers formed ordered structure near its glass-transition temperature (Tg). Furthermore, the FD foams exhibited high short-range order even in the unheated state, and the regularity was more developed by heating above 120 °C. |
| first_indexed | 2024-03-12T00:09:41Z |
| format | Article |
| id | doaj.art-f6554d3df409479ea92b6ff6983d7822 |
| institution | Directory Open Access Journal |
| issn | 2590-048X |
| language | English |
| last_indexed | 2024-03-12T00:09:41Z |
| publishDate | 2023-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Materials |
| spelling | doaj.art-f6554d3df409479ea92b6ff6983d78222023-09-16T05:31:31ZengElsevierResults in Materials2590-048X2023-09-0119100418Characteristic exothermic behavior and short-range ordering in aggregates of ultimately fine fibers made of monodisperse polystyreneHanako Asai0Yuuki Tanaka1Satoshi Irie2Kenji Hisada3Frontier Fiber Technology and Science Course, Graduate School of Engineering, University of Fukui, 3-9-1 Bunkyo, Fukui, 910-8507, Japan; Corresponding author.Frontier Fiber Technology and Science Course, Graduate School of Engineering, University of Fukui, 3-9-1 Bunkyo, Fukui, 910-8507, JapanMaterials Science and Engineering Course, Graduate School of Engineering, University of Fukui, 3-9-1 Bunkyo, Fukui, 910-8507, JapanFrontier Fiber Technology and Science Course, Graduate School of Engineering, University of Fukui, 3-9-1 Bunkyo, Fukui, 910-8507, JapanWe investigated the thermal behavior and structure formation of electrospun (ES) fiber mats and freeze-dried (FD) foams consisting of very fine fibrous network structure, and compared the results with those of self-standing membranes, in which the motion of boundary molecules is not restrained by contacting solids. We chose monodisperse polystyrene (PS) as a material polymer to examine the molecular weight effect as well. For the ES fibers and FD foams, a characteristic exothermic peak was observed at around 110 °C in DSC curve at 1st scan, while such exothermic peak did not appear for the self-standing films and bulk. To further investigate the nano-periodic structure inside materials during heating, we carried out WAXD measurements. Although the PS used in this study was atactic, the ES fibers formed ordered structure near its glass-transition temperature (Tg). Furthermore, the FD foams exhibited high short-range order even in the unheated state, and the regularity was more developed by heating above 120 °C.http://www.sciencedirect.com/science/article/pii/S2590048X23000560Monodisperse polystyreneFine fiberShort-range ordering |
| spellingShingle | Hanako Asai Yuuki Tanaka Satoshi Irie Kenji Hisada Characteristic exothermic behavior and short-range ordering in aggregates of ultimately fine fibers made of monodisperse polystyrene Results in Materials Monodisperse polystyrene Fine fiber Short-range ordering |
| title | Characteristic exothermic behavior and short-range ordering in aggregates of ultimately fine fibers made of monodisperse polystyrene |
| title_full | Characteristic exothermic behavior and short-range ordering in aggregates of ultimately fine fibers made of monodisperse polystyrene |
| title_fullStr | Characteristic exothermic behavior and short-range ordering in aggregates of ultimately fine fibers made of monodisperse polystyrene |
| title_full_unstemmed | Characteristic exothermic behavior and short-range ordering in aggregates of ultimately fine fibers made of monodisperse polystyrene |
| title_short | Characteristic exothermic behavior and short-range ordering in aggregates of ultimately fine fibers made of monodisperse polystyrene |
| title_sort | characteristic exothermic behavior and short range ordering in aggregates of ultimately fine fibers made of monodisperse polystyrene |
| topic | Monodisperse polystyrene Fine fiber Short-range ordering |
| url | http://www.sciencedirect.com/science/article/pii/S2590048X23000560 |
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