Macroscopically homogeneous deformation in injection molded polypropylene induced by annealing studied with microbeam X-ray scattering
書誌事項
- 公開日
- 2015-07
- 権利情報
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- https://www.elsevier.com/tdm/userlicense/1.0/
- DOI
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- 10.1016/j.polymer.2015.06.039
- 公開者
- Elsevier BV
この論文をさがす
説明
Abstract In a previous study (Shinohara et al., Macromolecules, 2012, 45, 1398–1407), we have found that the annealing of injection molded polypropylene makes its macroscopic deformation fairly homogeneous despite the existence of a non-oriented core layer composed of the spherulite structure. In this study, to elucidate the mechanism for the homogeneous deformation behavior induced by annealing, we conduct a scanning microbeam x-ray scattering measurement of injection molded polypropylene under uniaxial stretching and analyze the structural change at each layer for the first time. It is observed that a plastic deformation of the crystals at each layer of the annealed sample is suppressed compared to that of an as-prepared sample. Furthermore, in the highly oriented layers of the annealed sample, homogeneous cavitation accompanied by the formation of the void with a narrow size distribution is observed. We conclude that the homogeneous cavitation induces strain hardening in the oriented layers, and that the hardened oriented layers dominate the total deformation behavior.
収録刊行物
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- Polymer
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Polymer 70 315-325, 2015-07
Elsevier BV