A new value for the heat of fusion of a perfect crystal of cellulose acetate
SummaryThe enthalpy of fusion of a perfect crystal (ΔHf°) of cellulose acetate was determined in this work. In order to do so, cellulose samples from different sources were heterogeneously acetylated. The cellulose acetate samples were characterized by differential scanning calorimetry (DSC) and wid...
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| Veröffentlicht in: | Polymer bulletin (Berlin, Germany) Germany), 2006-03, Vol.56 (4-5), p.475-484 |
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| container_title | Polymer bulletin (Berlin, Germany) |
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| creator | CERQUEIRA, Daniel A RODRIGUES FILHO, Guimes ASSUNCAO, Rosana M. N |
| description | SummaryThe enthalpy of fusion of a perfect crystal (ΔHf°) of cellulose acetate was determined in this work. In order to do so, cellulose samples from different sources were heterogeneously acetylated. The cellulose acetate samples were characterized by differential scanning calorimetry (DSC) and wide angle X-ray scattering (WAXS). The diffractograms were deconvoluted into halos and peaks using the Pseudo-Voigt peak function. From these deconvolutions, the hypothesis that best represented the two-phase model was the one in which the amorphous model was represented by the halos at 11° and 21°, considering an ordered amorphous model. The WAXS crystallinities of the samples were then calculated from these values and plotted against the enthalpy of fusion of the materials, and from this relationship the ΔHf° for the cellulose acetate was determined to be 58.8 J/g. |
| doi_str_mv | 10.1007/s00289-006-0511-9 |
| format | Article |
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The WAXS crystallinities of the samples were then calculated from these values and plotted against the enthalpy of fusion of the materials, and from this relationship the ΔHf° for the cellulose acetate was determined to be 58.8 J/g.</description><identifier>ISSN: 0170-0839</identifier><identifier>EISSN: 1436-2449</identifier><identifier>DOI: 10.1007/s00289-006-0511-9</identifier><identifier>CODEN: POBUDR</identifier><language>eng</language><publisher>Heidelberg: Springer</publisher><subject>Applied sciences ; Cellulose acetate ; Cellulose and derivatives ; Enthalpy ; Exact sciences and technology ; Halos ; Heat of fusion ; Natural polymers ; Physicochemistry of polymers ; X-ray scattering</subject><ispartof>Polymer bulletin (Berlin, Germany), 2006-03, Vol.56 (4-5), p.475-484</ispartof><rights>2006 INIST-CNRS</rights><rights>Springer-Verlag 2006.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c369t-f7e9c5bb43d8050f7ca6d2caa3092e46d72742c62c0be5161c5991a0ef3b9df03</citedby><cites>FETCH-LOGICAL-c369t-f7e9c5bb43d8050f7ca6d2caa3092e46d72742c62c0be5161c5991a0ef3b9df03</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.proquest.com/docview/2917871399?pq-origsite=primo$$EHTML$$P50$$Gproquest$$H</linktohtml><link.rule.ids>315,781,785,21393,27929,27930,33749,43810,64390,64394,72474</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=17548928$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>CERQUEIRA, Daniel A</creatorcontrib><creatorcontrib>RODRIGUES FILHO, Guimes</creatorcontrib><creatorcontrib>ASSUNCAO, Rosana M. 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The WAXS crystallinities of the samples were then calculated from these values and plotted against the enthalpy of fusion of the materials, and from this relationship the ΔHf° for the cellulose acetate was determined to be 58.8 J/g.</description><subject>Applied sciences</subject><subject>Cellulose acetate</subject><subject>Cellulose and derivatives</subject><subject>Enthalpy</subject><subject>Exact sciences and technology</subject><subject>Halos</subject><subject>Heat of fusion</subject><subject>Natural polymers</subject><subject>Physicochemistry of polymers</subject><subject>X-ray scattering</subject><issn>0170-0839</issn><issn>1436-2449</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2006</creationdate><recordtype>article</recordtype><sourceid>AFKRA</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><recordid>eNpFkFtLwzAUx4MoOKcfwLeA-Bg9SdqkeRzDGxR80eeQpidso7YzSZV9e1s28Olc-F_gR8gthwcOoB8TgKgMA1AMSs6ZOSMLXkjFRFGYc7IAroFBJc0luUppB9OtFF-QekV7_KU_rhuRhiHSvEG6QZfpEGgY03bo583RPcaAPlMfDym7bn567LqxGxJS5zG7jNfkIrgu4c1pLsnn89PH-pXV7y9v61XNvFQms6DR-LJpCtlWUELQ3qlWeOckGIGFarXQhfBKeGiw5Ir70hjuAINsTBtALsndMXcfh-8RU7a7YYz9VGmF4brSXBozqfhR5eOQUsRg93H75eLBcrAzNHuEZidodoZmZ8_9Kdkl77oQXe-36d-oy6IyopJ_ZIdrWA</recordid><startdate>20060301</startdate><enddate>20060301</enddate><creator>CERQUEIRA, Daniel A</creator><creator>RODRIGUES FILHO, Guimes</creator><creator>ASSUNCAO, Rosana M. 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From these deconvolutions, the hypothesis that best represented the two-phase model was the one in which the amorphous model was represented by the halos at 11° and 21°, considering an ordered amorphous model. The WAXS crystallinities of the samples were then calculated from these values and plotted against the enthalpy of fusion of the materials, and from this relationship the ΔHf° for the cellulose acetate was determined to be 58.8 J/g.</abstract><cop>Heidelberg</cop><cop>Berlin</cop><cop>New York, NY</cop><pub>Springer</pub><doi>10.1007/s00289-006-0511-9</doi><tpages>10</tpages></addata></record> |
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| ispartof | Polymer bulletin (Berlin, Germany), 2006-03, Vol.56 (4-5), p.475-484 |
| issn | 0170-0839 1436-2449 |
| language | eng |
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| source | AUTh Library subscriptions: ProQuest Central; Springer journals; ProQuest Central UK/Ireland |
| subjects | Applied sciences Cellulose acetate Cellulose and derivatives Enthalpy Exact sciences and technology Halos Heat of fusion Natural polymers Physicochemistry of polymers X-ray scattering |
| title | A new value for the heat of fusion of a perfect crystal of cellulose acetate |
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