Effect of Mechanical Compression and Hydrostatic Pressure on the Molecular Mobility of Poly(lactic acid)
Summary The molecular mobility of an organic glass (PLA with 4.3% of D‐lactic acid content) was investigated by calculating the size of the Cooperative Rearranging Regions (CRR) at its glass transition. The samples were exposed to different external constraints – namely a large deformation by mechan...
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| Veröffentlicht in: | Macromolecular symposia. 2014-07, Vol.341 (1), p.26-33 |
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| container_title | Macromolecular symposia. |
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| creator | Bouthegourd, Emilie Esposito, Antonella Saiter, Allisson |
| description | Summary
The molecular mobility of an organic glass (PLA with 4.3% of D‐lactic acid content) was investigated by calculating the size of the Cooperative Rearranging Regions (CRR) at its glass transition. The samples were exposed to different external constraints – namely a large deformation by mechanical compression at T |
| doi_str_mv | 10.1002/masy.201300154 |
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The molecular mobility of an organic glass (PLA with 4.3% of D‐lactic acid content) was investigated by calculating the size of the Cooperative Rearranging Regions (CRR) at its glass transition. The samples were exposed to different external constraints – namely a large deformation by mechanical compression at T < Tg (prior to measurement) or different hydrostatic pressures (during the measurement). The measurements were performed by Differential Scanning Calorimetry (DSC) techniques: standard, temperature modulated (TM‐DSC) and high pressure (HP‐DSC). It was shown that mechanical deformations above the elastic limit increase the CRR size and shift the Tg value to higher temperatures, but have no effect on the value of ΔCp(Tg). On the other hand, increasing the hydrostatic pressure during the measurement (1 to 100 bar) decreases the CRR size, slightly influences Tg and does not change the value of ΔCp(Tg).</description><identifier>ISSN: 1022-1360</identifier><identifier>EISSN: 1521-3900</identifier><identifier>DOI: 10.1002/masy.201300154</identifier><language>eng</language><publisher>Weinheim: Blackwell Publishing Ltd</publisher><subject>Compressing ; compression ; Condensed Matter ; CRR ; Deformation ; Differential scanning calorimetry ; Elastic limit ; Engineering Sciences ; Glass transition ; Hydrostatic pressure ; Materials ; Materials Science ; Mathematical analysis ; molecular mobility ; Physics ; PLA ; pressure ; Soft Condensed Matter</subject><ispartof>Macromolecular symposia., 2014-07, Vol.341 (1), p.26-33</ispartof><rights>2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim</rights><rights>Distributed under a Creative Commons Attribution 4.0 International License</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c4594-7c47c52491d760a8a1ded7a14d7d1a666c357a468f62552acbcb9036028e940c3</citedby><cites>FETCH-LOGICAL-c4594-7c47c52491d760a8a1ded7a14d7d1a666c357a468f62552acbcb9036028e940c3</cites><orcidid>0000-0001-9275-6865 ; 0000-0003-0507-1417</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1002%2Fmasy.201300154$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1002%2Fmasy.201300154$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>230,314,778,782,883,1414,27911,27912,45561,45562</link.rule.ids><backlink>$$Uhttps://hal.science/hal-02155238$$DView record in HAL$$Hfree_for_read</backlink></links><search><creatorcontrib>Bouthegourd, Emilie</creatorcontrib><creatorcontrib>Esposito, Antonella</creatorcontrib><creatorcontrib>Saiter, Allisson</creatorcontrib><title>Effect of Mechanical Compression and Hydrostatic Pressure on the Molecular Mobility of Poly(lactic acid)</title><title>Macromolecular symposia.</title><addtitle>Macromol. Symp</addtitle><description>Summary
The molecular mobility of an organic glass (PLA with 4.3% of D‐lactic acid content) was investigated by calculating the size of the Cooperative Rearranging Regions (CRR) at its glass transition. The samples were exposed to different external constraints – namely a large deformation by mechanical compression at T < Tg (prior to measurement) or different hydrostatic pressures (during the measurement). The measurements were performed by Differential Scanning Calorimetry (DSC) techniques: standard, temperature modulated (TM‐DSC) and high pressure (HP‐DSC). It was shown that mechanical deformations above the elastic limit increase the CRR size and shift the Tg value to higher temperatures, but have no effect on the value of ΔCp(Tg). On the other hand, increasing the hydrostatic pressure during the measurement (1 to 100 bar) decreases the CRR size, slightly influences Tg and does not change the value of ΔCp(Tg).</description><subject>Compressing</subject><subject>compression</subject><subject>Condensed Matter</subject><subject>CRR</subject><subject>Deformation</subject><subject>Differential scanning calorimetry</subject><subject>Elastic limit</subject><subject>Engineering Sciences</subject><subject>Glass transition</subject><subject>Hydrostatic pressure</subject><subject>Materials</subject><subject>Materials Science</subject><subject>Mathematical analysis</subject><subject>molecular mobility</subject><subject>Physics</subject><subject>PLA</subject><subject>pressure</subject><subject>Soft Condensed Matter</subject><issn>1022-1360</issn><issn>1521-3900</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2014</creationdate><recordtype>article</recordtype><recordid>eNqFkcFv0zAUhyMEEmPsyjkSl-2Q8mwndn2sqrFOatgkYIiT9eo4qocbFzsB8t_PUVCFduHkJ7_ve_LzL8veEVgQAPrhgHFcUCAMgFTli-yMVJQUTAK8TDVQWhDG4XX2JsZHAJBSkLNsf922Rve5b_Pa6D12VqPL1_5wDCZG67scuybfjE3wscfe6vx-agzB5KnX701ee2f04DCkamed7cdp2L1346VDPRmobXP1NnvVoovm4u95nn39eP1lvSm2dze369W20GUly0LoUuiKlpI0ggMukTSmEUjKRjQEOeeaVQJLvmw5rSqKeqd3EtJedGlkCZqdZ1fz3D06dQz2gGFUHq3arLZqugNKksiWv0hiL2f2GPzPwcReHWzUxjnsjB-iSqAUlJZiQt8_Qx_9ELq0iSKcQ8VAUpqoxUzp9F0xmPb0AgJqCklNIalTSEmQs_DbOjP-h1b16vP3f91idm3szZ-Ti-GH4oKJSn37dKM4IbSu2YOS7AmDqaMI</recordid><startdate>201407</startdate><enddate>201407</enddate><creator>Bouthegourd, Emilie</creator><creator>Esposito, Antonella</creator><creator>Saiter, Allisson</creator><general>Blackwell Publishing Ltd</general><general>Wiley Subscription Services, Inc</general><general>Wiley-VCH Verlag</general><scope>BSCLL</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8FD</scope><scope>JG9</scope><scope>1XC</scope><orcidid>https://orcid.org/0000-0001-9275-6865</orcidid><orcidid>https://orcid.org/0000-0003-0507-1417</orcidid></search><sort><creationdate>201407</creationdate><title>Effect of Mechanical Compression and Hydrostatic Pressure on the Molecular Mobility of Poly(lactic acid)</title><author>Bouthegourd, Emilie ; Esposito, Antonella ; Saiter, Allisson</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c4594-7c47c52491d760a8a1ded7a14d7d1a666c357a468f62552acbcb9036028e940c3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2014</creationdate><topic>Compressing</topic><topic>compression</topic><topic>Condensed Matter</topic><topic>CRR</topic><topic>Deformation</topic><topic>Differential scanning calorimetry</topic><topic>Elastic limit</topic><topic>Engineering Sciences</topic><topic>Glass transition</topic><topic>Hydrostatic pressure</topic><topic>Materials</topic><topic>Materials Science</topic><topic>Mathematical analysis</topic><topic>molecular mobility</topic><topic>Physics</topic><topic>PLA</topic><topic>pressure</topic><topic>Soft Condensed Matter</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Bouthegourd, Emilie</creatorcontrib><creatorcontrib>Esposito, Antonella</creatorcontrib><creatorcontrib>Saiter, Allisson</creatorcontrib><collection>Istex</collection><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>Hyper Article en Ligne (HAL)</collection><jtitle>Macromolecular symposia.</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Bouthegourd, Emilie</au><au>Esposito, Antonella</au><au>Saiter, Allisson</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effect of Mechanical Compression and Hydrostatic Pressure on the Molecular Mobility of Poly(lactic acid)</atitle><jtitle>Macromolecular symposia.</jtitle><addtitle>Macromol. Symp</addtitle><date>2014-07</date><risdate>2014</risdate><volume>341</volume><issue>1</issue><spage>26</spage><epage>33</epage><pages>26-33</pages><issn>1022-1360</issn><eissn>1521-3900</eissn><abstract>Summary
The molecular mobility of an organic glass (PLA with 4.3% of D‐lactic acid content) was investigated by calculating the size of the Cooperative Rearranging Regions (CRR) at its glass transition. The samples were exposed to different external constraints – namely a large deformation by mechanical compression at T < Tg (prior to measurement) or different hydrostatic pressures (during the measurement). The measurements were performed by Differential Scanning Calorimetry (DSC) techniques: standard, temperature modulated (TM‐DSC) and high pressure (HP‐DSC). It was shown that mechanical deformations above the elastic limit increase the CRR size and shift the Tg value to higher temperatures, but have no effect on the value of ΔCp(Tg). On the other hand, increasing the hydrostatic pressure during the measurement (1 to 100 bar) decreases the CRR size, slightly influences Tg and does not change the value of ΔCp(Tg).</abstract><cop>Weinheim</cop><pub>Blackwell Publishing Ltd</pub><doi>10.1002/masy.201300154</doi><tpages>8</tpages><orcidid>https://orcid.org/0000-0001-9275-6865</orcidid><orcidid>https://orcid.org/0000-0003-0507-1417</orcidid></addata></record> |
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| language | eng |
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| source | Wiley Online Library Journals Frontfile Complete |
| subjects | Compressing compression Condensed Matter CRR Deformation Differential scanning calorimetry Elastic limit Engineering Sciences Glass transition Hydrostatic pressure Materials Materials Science Mathematical analysis molecular mobility Physics PLA pressure Soft Condensed Matter |
| title | Effect of Mechanical Compression and Hydrostatic Pressure on the Molecular Mobility of Poly(lactic acid) |
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