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Effect of degree of substitution on the microphase separation and mechanical properties of cellooligosaccharide acetate-based elastomers
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| Title: | Effect of degree of substitution on the microphase separation and mechanical properties of cellooligosaccharide acetate-based elastomers |
| Authors: | Katsuhara, Satoshi Browse this author | | Sunagawa, Naoki Browse this author →KAKEN DB | | Igarashi, Kiyohiko Browse this author →KAKEN DB | | Takeuchi, Yutaka Browse this author →KAKEN DB | | Takahashi, Kenji Browse this author →KAKEN DB | | Yamamoto, Takuya Browse this author →KAKEN DB | | Li, Feng Browse this author →KAKEN DB | | Tajima, Kenji Browse this author →KAKEN DB | | Isono, Takuya Browse this author →KAKEN DB | | Satoh, Toshifumi Browse this author →KAKEN DB |
| Keywords: | Thermoplastic elastomer | | Cellulose acetate | | Mechanical properties | | Biodegradability | | Microphase separation | | Self-assembly |
| Issue Date: | 15-Sep-2023 |
| Publisher: | Elsevier |
| Journal Title: | Carbohydrate Polymers |
| Volume: | 316 |
| Start Page: | 120976 |
| Publisher DOI: | 10.1016/j.carbpol.2023.120976 |
| PMID: | 37321706 |
| Abstract: | Thermoplastic elastomers (TPEs) have long been used in a wide range of industries. However, most existing TPEs are petroleum-derived polymers. To realize environmentally benign alternatives to conventional TPEs, cellulose acetate is a promising TPE hard segment because of its sufficient mechanical properties, availability from renewable sources, and biodegradability in natural environments. Because the degree of substitution (DS) of cellulose acetate governs a range of physical properties, it is a useful parameter for designing novel cellulose acetate-based TPEs. In this study, we synthesized cellulose acetate-based ABA-type triblock copolymers (AcCelx- b-PDL-b-AcCelx) containing a celloologosaccharide acetate hard A segment (AcCelx, where x is the DS; x = 3.0, 2.6, and 2.3) and a poly(o-decanolactone) (PDL) soft B segment. Small-angle X-ray scattering showed that decreasing the DS of AcCelx-b-PDL-b-AcCelx resulted in the formation of a more ordered microphase-separated structure. Owing to the microphase separation of the hard cellulosic and soft PDL segments, all the AcCelx-b- PDL-b-AcCelx samples exhibited elastomer-like properties. Moreover, the decrease in DS improved toughness and suppressed stress relaxation. Furthermore, preliminary biodegradation tests in an aqueous environment revealed that the decrease in DS endowed AcCelx-b-PDL-b-AcCelx with greater biodegradability potential. This work demonstrates the usefulness of cellulose acetate-based TPEs as next-generation sustainable materials. |
| Rights: | © <2023>. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ | | http://creativecommons.org/licenses/by-nc-nd/4.0/ |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/92207 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 佐藤 敏文
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