Phase Analysis of the Cellulose Triacetate-Nitromethane System
A comprehensive study was made on the cellulose triacetate-nitromethane system to explore its phase separation within ranges 2–25 wt.% and −5÷+80°C by means of polarization light and electron microscopy, the turbidity spectrum method, differential thermal and X-ray analyses, and rheological techniqu...
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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/10.1155/2012/126362 |
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| author | Anna B. Shipovskaya Natalia O. Gegel Sergei L. Shmakov Sergei Yu. Shchyogolev |
| author_facet | Anna B. Shipovskaya Natalia O. Gegel Sergei L. Shmakov Sergei Yu. Shchyogolev |
| author_sort | Anna B. Shipovskaya |
| collection | DOAJ |
| description | A comprehensive study was made on the cellulose triacetate-nitromethane system to explore its phase separation within ranges 2–25 wt.% and −5÷+80°C by means of polarization light and electron microscopy, the turbidity spectrum method, differential thermal and X-ray analyses, and rheological techniques. The physical state of the polymer was identified within the phase coexistence boundaries on the phase diagram which included three types of phase separation (amorphous (with a UCST at Tcr=57∘C and ccr=7.3 wt.%), crystal, and liquid crystal). The boundaries of the regions determining the coexistence of the liquid crystal (LC) and the partly crystal phase were found to be inside the region of amorphous liquid-liquid phase separation. For cellulose ester-solvent systems, this state diagram is the first experimental evidence for the possibility of coexistence of several phases with amorphous, LC, and crystal polymer ordering. |
| format | Article |
| id | doaj-art-1c3dc012774d46fd893242ebbb69abc4 |
| institution | Kabale University |
| 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-1c3dc012774d46fd893242ebbb69abc42025-08-20T03:54:52ZengWileyInternational Journal of Polymer Science1687-94221687-94302012-01-01201210.1155/2012/126362126362Phase Analysis of the Cellulose Triacetate-Nitromethane SystemAnna B. Shipovskaya0Natalia O. Gegel1Sergei L. Shmakov2Sergei Yu. Shchyogolev3Institute of Chemistry, Saratov State University, 83 Ulitsa Astrakhanskaya, Saratov 410012, RussiaInstitute of Chemistry, Saratov State University, 83 Ulitsa Astrakhanskaya, Saratov 410012, RussiaInstitute of Chemistry, Saratov State University, 83 Ulitsa Astrakhanskaya, Saratov 410012, RussiaInstitute of Biochemistry and Physiology of Plants and Microorganisms, 13 Prospect Entuziastov, Saratov 410049, RussiaA comprehensive study was made on the cellulose triacetate-nitromethane system to explore its phase separation within ranges 2–25 wt.% and −5÷+80°C by means of polarization light and electron microscopy, the turbidity spectrum method, differential thermal and X-ray analyses, and rheological techniques. The physical state of the polymer was identified within the phase coexistence boundaries on the phase diagram which included three types of phase separation (amorphous (with a UCST at Tcr=57∘C and ccr=7.3 wt.%), crystal, and liquid crystal). The boundaries of the regions determining the coexistence of the liquid crystal (LC) and the partly crystal phase were found to be inside the region of amorphous liquid-liquid phase separation. For cellulose ester-solvent systems, this state diagram is the first experimental evidence for the possibility of coexistence of several phases with amorphous, LC, and crystal polymer ordering.http://dx.doi.org/10.1155/2012/126362 |
| spellingShingle | Anna B. Shipovskaya Natalia O. Gegel Sergei L. Shmakov Sergei Yu. Shchyogolev Phase Analysis of the Cellulose Triacetate-Nitromethane System International Journal of Polymer Science |
| title | Phase Analysis of the Cellulose Triacetate-Nitromethane System |
| title_full | Phase Analysis of the Cellulose Triacetate-Nitromethane System |
| title_fullStr | Phase Analysis of the Cellulose Triacetate-Nitromethane System |
| title_full_unstemmed | Phase Analysis of the Cellulose Triacetate-Nitromethane System |
| title_short | Phase Analysis of the Cellulose Triacetate-Nitromethane System |
| title_sort | phase analysis of the cellulose triacetate nitromethane system |
| url | http://dx.doi.org/10.1155/2012/126362 |
| work_keys_str_mv | AT annabshipovskaya phaseanalysisofthecellulosetriacetatenitromethanesystem AT nataliaogegel phaseanalysisofthecellulosetriacetatenitromethanesystem AT sergeilshmakov phaseanalysisofthecellulosetriacetatenitromethanesystem AT sergeiyushchyogolev phaseanalysisofthecellulosetriacetatenitromethanesystem |