Polymorphic phase transition and thermal stability in squaric acid (H2C4O4)
DC Field | Value | Language |
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dc.contributor.author | Lee, Kwang-Sei | - |
dc.contributor.author | Kweon, Jin Jung | - |
dc.contributor.author | Oh, In-Hwan | - |
dc.contributor.author | Lee, Cheol Eui | - |
dc.date.accessioned | 2021-09-06T17:57:31Z | - |
dc.date.available | 2021-09-06T17:57:31Z | - |
dc.date.created | 2021-06-18 | - |
dc.date.issued | 2012-07 | - |
dc.identifier.issn | 0022-3697 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/107986 | - |
dc.description.abstract | Phase transformations in squaric acid (H2C4O4) have been investigated by thermogravimetry and differential scanning calorimetry with different heating rates beta. The mass loss in TG apparently begins at onset temperatures T-di=245 +/- 5 degrees C (beta=5 degrees C min(-1)), 262 +/- 5 degrees C (beta=10 degrees C min(-1)), and 275 +/- 5 degrees C (beta=20 degrees C min(-1)). A polymorphic phase transition was recognized as a weak endothermic peak in DSC around 101 degrees C (T-c(+)). Further heating with beta=10 degrees C min(-1) in DSC revealed deviation of the baseline around 310 degrees C (T-i), and a large unusual exothermic peak around 355 degrees C (T-p), which are interpreted as an onset and a peak temperature of thermal decomposition, respectively. The activation energy of the thermal decomposition was obtained by employing relevant models. Thermal decomposition was recognized as a carbonization process, resulting in amorphous carbon. (C) 2012 Elsevier Ltd. All rights reserved. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | PERGAMON-ELSEVIER SCIENCE LTD | - |
dc.subject | ORDER-DISORDER | - |
dc.subject | AMINO-ACIDS | - |
dc.subject | CRYSTALS | - |
dc.subject | DYNAMICS | - |
dc.subject | SOLIDS | - |
dc.title | Polymorphic phase transition and thermal stability in squaric acid (H2C4O4) | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Lee, Cheol Eui | - |
dc.identifier.doi | 10.1016/j.jpcs.2012.02.013 | - |
dc.identifier.scopusid | 2-s2.0-84862779689 | - |
dc.identifier.wosid | 000303639500016 | - |
dc.identifier.bibliographicCitation | JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, v.73, no.7, pp.890 - 895 | - |
dc.relation.isPartOf | JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | - |
dc.citation.title | JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | - |
dc.citation.volume | 73 | - |
dc.citation.number | 7 | - |
dc.citation.startPage | 890 | - |
dc.citation.endPage | 895 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Chemistry | - |
dc.relation.journalResearchArea | Physics | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Multidisciplinary | - |
dc.relation.journalWebOfScienceCategory | Physics, Condensed Matter | - |
dc.subject.keywordPlus | ORDER-DISORDER | - |
dc.subject.keywordPlus | AMINO-ACIDS | - |
dc.subject.keywordPlus | CRYSTALS | - |
dc.subject.keywordPlus | DYNAMICS | - |
dc.subject.keywordPlus | SOLIDS | - |
dc.subject.keywordAuthor | Crystal growth | - |
dc.subject.keywordAuthor | Differential scanning calorimetry (DSC) | - |
dc.subject.keywordAuthor | Thermogravimetric analysis (TGA) | - |
dc.subject.keywordAuthor | X-ray diffraction | - |
dc.subject.keywordAuthor | Phase transitions | - |
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