Dielectric Relaxation Phenomena of Polylactic Acid with 𝜷-Crystalline Chitin
𝛽-crystalline chitin was added to polylactic acid (PLA), and this PLA was then heat-treated at 100∘C for one minute. The crystallinity of the heat-treated PLA increased to more than 40%, and its crystallization speed also increased significantly. The temperature dependency of these materials’ relati...
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| Format: | Article |
| Language: | English |
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Wiley
2012-01-01
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| Series: | International Journal of Polymer Science |
| Online Access: | http://dx.doi.org/10.1155/2012/389491 |
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| author | Katsuyoshi Shinyama Toru Oi Shigetaka Fujita |
| author_facet | Katsuyoshi Shinyama Toru Oi Shigetaka Fujita |
| author_sort | Katsuyoshi Shinyama |
| collection | DOAJ |
| description | 𝛽-crystalline chitin was added to polylactic acid (PLA), and this PLA was then heat-treated at 100∘C for one minute. The crystallinity of the heat-treated PLA increased to more than 40%, and its crystallization speed also increased significantly. The temperature dependency of these materials’ relative permittivity (𝜀𝑟)
and relative dielectric loss factor (𝜀𝑟) was also examined. The dielectric absorption peak value in 𝜀𝑟 curve of the PLA to which chitin was added and was smaller than that of PLA without chitin. Additionally, the Havriliak-Negami relaxation function was used to produce approximation curves for the frequency dependency of 𝜀𝑟 and 𝜀𝑟 of chitin with PLA added at 80∘C. As a result, the relaxation strength (Δ𝜀) of the chitin with PLA added was smaller than that of the PLA without chitin, and the relaxation time (𝜏) of the chitin with PLA added was approximately 2.5 times larger than that of the PLA without chitin. |
| format | Article |
| id | doaj-art-5c55c7013fa844798742c8658d760d6e |
| institution | OA Journals |
| issn | 1687-9422 1687-9430 |
| language | English |
| publishDate | 2012-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Polymer Science |
| spelling | doaj-art-5c55c7013fa844798742c8658d760d6e2025-08-20T02:05:43ZengWileyInternational Journal of Polymer Science1687-94221687-94302012-01-01201210.1155/2012/389491389491Dielectric Relaxation Phenomena of Polylactic Acid with 𝜷-Crystalline ChitinKatsuyoshi Shinyama0Toru Oi1Shigetaka Fujita2Department of Electronic and Information Engineering, Hachinohe Institute of Technology, 88-1 Myo Ohbiraki, Hachinohe 031-8501, JapanDepartment of Electronic and Information Engineering, Hachinohe Institute of Technology, 88-1 Myo Ohbiraki, Hachinohe 031-8501, JapanDepartment of Electronic and Information Engineering, Hachinohe Institute of Technology, 88-1 Myo Ohbiraki, Hachinohe 031-8501, Japan𝛽-crystalline chitin was added to polylactic acid (PLA), and this PLA was then heat-treated at 100∘C for one minute. The crystallinity of the heat-treated PLA increased to more than 40%, and its crystallization speed also increased significantly. The temperature dependency of these materials’ relative permittivity (𝜀𝑟) and relative dielectric loss factor (𝜀𝑟) was also examined. The dielectric absorption peak value in 𝜀𝑟 curve of the PLA to which chitin was added and was smaller than that of PLA without chitin. Additionally, the Havriliak-Negami relaxation function was used to produce approximation curves for the frequency dependency of 𝜀𝑟 and 𝜀𝑟 of chitin with PLA added at 80∘C. As a result, the relaxation strength (Δ𝜀) of the chitin with PLA added was smaller than that of the PLA without chitin, and the relaxation time (𝜏) of the chitin with PLA added was approximately 2.5 times larger than that of the PLA without chitin.http://dx.doi.org/10.1155/2012/389491 |
| spellingShingle | Katsuyoshi Shinyama Toru Oi Shigetaka Fujita Dielectric Relaxation Phenomena of Polylactic Acid with 𝜷-Crystalline Chitin International Journal of Polymer Science |
| title | Dielectric Relaxation Phenomena of Polylactic Acid with 𝜷-Crystalline Chitin |
| title_full | Dielectric Relaxation Phenomena of Polylactic Acid with 𝜷-Crystalline Chitin |
| title_fullStr | Dielectric Relaxation Phenomena of Polylactic Acid with 𝜷-Crystalline Chitin |
| title_full_unstemmed | Dielectric Relaxation Phenomena of Polylactic Acid with 𝜷-Crystalline Chitin |
| title_short | Dielectric Relaxation Phenomena of Polylactic Acid with 𝜷-Crystalline Chitin |
| title_sort | dielectric relaxation phenomena of polylactic acid with 𝜷 crystalline chitin |
| url | http://dx.doi.org/10.1155/2012/389491 |
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