High Molecular-Weight Thermoplastic Polymerization of Kraft Lignin Macromers with Diisocyanate
DC Field | Value | Language |
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dc.contributor.author | Le Dai Duong | - |
dc.contributor.author | Nam, Gi-Yong | - |
dc.contributor.author | Oh, Joon-Suk | - |
dc.contributor.author | Park, In-Kyung | - |
dc.contributor.author | Nguyen Dang Luong | - |
dc.contributor.author | Yoon, Ho-Kyu | - |
dc.contributor.author | Lee, Seong-Hoon | - |
dc.contributor.author | Lee, Youngkwan | - |
dc.contributor.author | Yun, Ju-Ho | - |
dc.contributor.author | Lee, Chong-Gu | - |
dc.contributor.author | Hwang, Suk-Ho | - |
dc.contributor.author | Nam, Jae-Do | - |
dc.date.accessioned | 2021-09-05T17:03:39Z | - |
dc.date.available | 2021-09-05T17:03:39Z | - |
dc.date.created | 2021-06-15 | - |
dc.date.issued | 2014 | - |
dc.identifier.issn | 1930-2126 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/101066 | - |
dc.description.abstract | A high molecular-weight thermoplastic lignin-based polymer was successfully synthesized by adjusting the degree of polymerization while inducing linear growth of lignin macromers via methylene diphenyldiisocyanate. The thermoplastic lignin-urethane polymer was desirably achieved in a narrow range of reaction conditions of 2.5 to 3.5 h at 80 degrees C in this study, and the molecular weight of the resulting lignin-based polyurethanes (LigPU) reached as high as 912,000 g/mole, which is far above any reported values of lignin-based polymer derivatives. The thermal stability of LigPU was greatly improved by the urethane polymerization, giving the initial degradation temperature (T-2%) at 204 degrees C, which should be compared with T-2% = 104 degrees C of the pristine lignin. This was due to the fact that the OH groups in the lignin macromers, having low bond-dissociation energy, were replaced by the urethane bonds. In dielectric analysis, the synthesized LigPU exhibited a softening transition at 175 degrees C corresponding to a combinatorial dual process of the dry T-g,T-dry of the lignin macromers and the softening of methylenediphenyl urethane chains. This work clearly demonstrated that a high molecular weight of thermoplastic LigPU could be desirably synthesized, broadening the lignin application for value added and eco-friendly products through common melt processes of polymer blend or composites. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | NORTH CAROLINA STATE UNIV DEPT WOOD & PAPER SCI | - |
dc.subject | THERMAL-DECOMPOSITION | - |
dc.subject | POLYURETHANES | - |
dc.title | High Molecular-Weight Thermoplastic Polymerization of Kraft Lignin Macromers with Diisocyanate | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Yoon, Ho-Kyu | - |
dc.identifier.wosid | 000336960700042 | - |
dc.identifier.bibliographicCitation | BIORESOURCES, v.9, no.2, pp.2359 - 2371 | - |
dc.relation.isPartOf | BIORESOURCES | - |
dc.citation.title | BIORESOURCES | - |
dc.citation.volume | 9 | - |
dc.citation.number | 2 | - |
dc.citation.startPage | 2359 | - |
dc.citation.endPage | 2371 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Materials Science | - |
dc.relation.journalWebOfScienceCategory | Materials Science, Paper & Wood | - |
dc.subject.keywordPlus | THERMAL-DECOMPOSITION | - |
dc.subject.keywordPlus | POLYURETHANES | - |
dc.subject.keywordAuthor | Lignin | - |
dc.subject.keywordAuthor | Lignin-based polyurethane | - |
dc.subject.keywordAuthor | Eco-friendly | - |
dc.subject.keywordAuthor | Dielectric analysis | - |
dc.subject.keywordAuthor | Glass transition temperature | - |
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