2017年5月5日
Strain-induced molecular aggregation states around a crack tip in a segmented polyurethane film under uniaxial stretching
Polymer (United Kingdom)
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- ,
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- 巻
- 116
- 号
- 開始ページ
- 458
- 終了ページ
- 465
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1016/j.polymer.2016.12.033
- 出版者・発行元
- Elsevier Ltd
The development of molecular aggregation structures during stretching deformation and local structure mapping around a crack tip of a segmented polyurethane elastomer film were investigated by in situ simultaneous small-angle X-ray scattering (SAXS) and wide-angle X-ray diffraction (WAXD) and by micro-beam WAXD, respectively. Both the hard segment (HS) domain orientation and the strain-induced crystallization of poly(ε-caprolactone) chains were tracked by the WAXD pattern due to the high crystallinity of the symmetric non-bulky aliphatic HS structure. Strain-induced crystallization occurred locally at the vicinity of the crack tip, and the crystallinity immediately decayed in the exterior, whereas the HS domain orientation was observed throughout the stretched film. The mechanisms underlying crack arrest and the mechanical strength of polyurethane elastomer films are associated with the local strain-induced crystallization at the crack tip, the mechanical stability of the HS domains, and the avoidance of local stress concentration through the HS domain orientation.
- リンク情報
-
- DOI
- https://doi.org/10.1016/j.polymer.2016.12.033
- Web of Science
- https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000401109600050&DestApp=WOS_CPL
- Scopus Url
- http://www.scopus.com/inward/record.url?eid=2-s2.0-85008498789&partnerID=MN8TOARS
- ID情報
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- DOI : 10.1016/j.polymer.2016.12.033
- ISSN : 0032-3861
- eISSN : 1873-2291
- ORCIDのPut Code : 36505288
- SCOPUS ID : 85008498789
- Web of Science ID : WOS:000401109600050