Linearity of heat capacity step near the onset of α glass transition in poly(n-alkylmethacrylate)s
DSC measurements around the glass transition in the homologous series of seven poly(n-alkylmethacrylate)s (alkyl=methyl, ethyl, propyl, butyl, pentyl, hexyl, octyl) are presented. The step height Δcp decreases linearly with the number of n-alkyl C-atoms in the side chain. The usual glass step in the...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
|---|
| Format: |
E-Artikel |
|---|---|
| Sprache: |
Englisch |
| Erschienen: |
1996 |
|---|
| Umfang: |
8 Ill. ; 3 Tab. 5 |
|---|
| Reproduktion: |
Wiley InterScience Backfile Collection 1832-2000 |
|---|---|
| Übergeordnetes Werk: |
in: Acta Polymerica - Weinheim : Wiley-VCH, 47(1996), Seite 525-529 |
| Übergeordnetes Werk: |
volume:47 ; year:1996 ; month:11 ; pages:525-529 ; extent:5 |
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| 520 | |a DSC measurements around the glass transition in the homologous series of seven poly(n-alkylmethacrylate)s (alkyl=methyl, ethyl, propyl, butyl, pentyl, hexyl, octyl) are presented. The step height Δcp decreases linearly with the number of n-alkyl C-atoms in the side chain. The usual glass step in the DSC curves, e. g. for poly(methylmethacrylate), degenerates to a bend near poly(n-octylmethacrylate). This finding is discussed as a result of a linear relation between the caloric relaxation strength Δcp and the temperature difference from the α onset Tonset in the splitting region of poly(n-alkylmethacrylate)s, with Δcp → 0 for T → Tonset. The number of monomeric units per cooperatively rearranging region at Tg decreases from PMMA (Nα∼20) to PnOMA (Nα<5). This demonstrates that the cooperativity at the α onset in poly(n-alkylmethacrylate)s is very small, as expected from a fluctuation approach to the glass transition. | ||
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(DE-627)NLEJ163378525 DE-627 ger DE-627 rakwb eng Linearity of heat capacity step near the onset of α glass transition in poly(n-alkylmethacrylate)s 1996 8 Ill. 3 Tab. 5 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier DSC measurements around the glass transition in the homologous series of seven poly(n-alkylmethacrylate)s (alkyl=methyl, ethyl, propyl, butyl, pentyl, hexyl, octyl) are presented. The step height Δcp decreases linearly with the number of n-alkyl C-atoms in the side chain. The usual glass step in the DSC curves, e. g. for poly(methylmethacrylate), degenerates to a bend near poly(n-octylmethacrylate). This finding is discussed as a result of a linear relation between the caloric relaxation strength Δcp and the temperature difference from the α onset Tonset in the splitting region of poly(n-alkylmethacrylate)s, with Δcp → 0 for T → Tonset. The number of monomeric units per cooperatively rearranging region at Tg decreases from PMMA (Nα∼20) to PnOMA (Nα<5). This demonstrates that the cooperativity at the α onset in poly(n-alkylmethacrylate)s is very small, as expected from a fluctuation approach to the glass transition. Wiley InterScience Backfile Collection 1832-2000 Hempel, E. oth Beiner, M. oth Renner, T. oth Donth, E. oth in Acta Polymerica Weinheim : Wiley-VCH 47(1996), Seite 525-529 (DE-627)NLEJ15907133X (DE-600)1474947-6 0323-7648 nnns volume:47 year:1996 month:11 pages:525-529 extent:5 http://dx.doi.org/10.1002/actp.1996.010471109 text/html Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-WIS GBV_NL_ARTICLE AR 47 1996 11-12 525-529 5 |
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(DE-627)NLEJ163378525 DE-627 ger DE-627 rakwb eng Linearity of heat capacity step near the onset of α glass transition in poly(n-alkylmethacrylate)s 1996 8 Ill. 3 Tab. 5 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier DSC measurements around the glass transition in the homologous series of seven poly(n-alkylmethacrylate)s (alkyl=methyl, ethyl, propyl, butyl, pentyl, hexyl, octyl) are presented. The step height Δcp decreases linearly with the number of n-alkyl C-atoms in the side chain. The usual glass step in the DSC curves, e. g. for poly(methylmethacrylate), degenerates to a bend near poly(n-octylmethacrylate). This finding is discussed as a result of a linear relation between the caloric relaxation strength Δcp and the temperature difference from the α onset Tonset in the splitting region of poly(n-alkylmethacrylate)s, with Δcp → 0 for T → Tonset. The number of monomeric units per cooperatively rearranging region at Tg decreases from PMMA (Nα∼20) to PnOMA (Nα<5). This demonstrates that the cooperativity at the α onset in poly(n-alkylmethacrylate)s is very small, as expected from a fluctuation approach to the glass transition. Wiley InterScience Backfile Collection 1832-2000 Hempel, E. oth Beiner, M. oth Renner, T. oth Donth, E. oth in Acta Polymerica Weinheim : Wiley-VCH 47(1996), Seite 525-529 (DE-627)NLEJ15907133X (DE-600)1474947-6 0323-7648 nnns volume:47 year:1996 month:11 pages:525-529 extent:5 http://dx.doi.org/10.1002/actp.1996.010471109 text/html Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-WIS GBV_NL_ARTICLE AR 47 1996 11-12 525-529 5 |
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(DE-627)NLEJ163378525 DE-627 ger DE-627 rakwb eng Linearity of heat capacity step near the onset of α glass transition in poly(n-alkylmethacrylate)s 1996 8 Ill. 3 Tab. 5 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier DSC measurements around the glass transition in the homologous series of seven poly(n-alkylmethacrylate)s (alkyl=methyl, ethyl, propyl, butyl, pentyl, hexyl, octyl) are presented. The step height Δcp decreases linearly with the number of n-alkyl C-atoms in the side chain. The usual glass step in the DSC curves, e. g. for poly(methylmethacrylate), degenerates to a bend near poly(n-octylmethacrylate). This finding is discussed as a result of a linear relation between the caloric relaxation strength Δcp and the temperature difference from the α onset Tonset in the splitting region of poly(n-alkylmethacrylate)s, with Δcp → 0 for T → Tonset. The number of monomeric units per cooperatively rearranging region at Tg decreases from PMMA (Nα∼20) to PnOMA (Nα<5). This demonstrates that the cooperativity at the α onset in poly(n-alkylmethacrylate)s is very small, as expected from a fluctuation approach to the glass transition. Wiley InterScience Backfile Collection 1832-2000 Hempel, E. oth Beiner, M. oth Renner, T. oth Donth, E. oth in Acta Polymerica Weinheim : Wiley-VCH 47(1996), Seite 525-529 (DE-627)NLEJ15907133X (DE-600)1474947-6 0323-7648 nnns volume:47 year:1996 month:11 pages:525-529 extent:5 http://dx.doi.org/10.1002/actp.1996.010471109 text/html Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-WIS GBV_NL_ARTICLE AR 47 1996 11-12 525-529 5 |
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(DE-627)NLEJ163378525 DE-627 ger DE-627 rakwb eng Linearity of heat capacity step near the onset of α glass transition in poly(n-alkylmethacrylate)s 1996 8 Ill. 3 Tab. 5 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier DSC measurements around the glass transition in the homologous series of seven poly(n-alkylmethacrylate)s (alkyl=methyl, ethyl, propyl, butyl, pentyl, hexyl, octyl) are presented. The step height Δcp decreases linearly with the number of n-alkyl C-atoms in the side chain. The usual glass step in the DSC curves, e. g. for poly(methylmethacrylate), degenerates to a bend near poly(n-octylmethacrylate). This finding is discussed as a result of a linear relation between the caloric relaxation strength Δcp and the temperature difference from the α onset Tonset in the splitting region of poly(n-alkylmethacrylate)s, with Δcp → 0 for T → Tonset. The number of monomeric units per cooperatively rearranging region at Tg decreases from PMMA (Nα∼20) to PnOMA (Nα<5). This demonstrates that the cooperativity at the α onset in poly(n-alkylmethacrylate)s is very small, as expected from a fluctuation approach to the glass transition. Wiley InterScience Backfile Collection 1832-2000 Hempel, E. oth Beiner, M. oth Renner, T. oth Donth, E. oth in Acta Polymerica Weinheim : Wiley-VCH 47(1996), Seite 525-529 (DE-627)NLEJ15907133X (DE-600)1474947-6 0323-7648 nnns volume:47 year:1996 month:11 pages:525-529 extent:5 http://dx.doi.org/10.1002/actp.1996.010471109 text/html Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-WIS GBV_NL_ARTICLE AR 47 1996 11-12 525-529 5 |
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(DE-627)NLEJ163378525 DE-627 ger DE-627 rakwb eng Linearity of heat capacity step near the onset of α glass transition in poly(n-alkylmethacrylate)s 1996 8 Ill. 3 Tab. 5 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier DSC measurements around the glass transition in the homologous series of seven poly(n-alkylmethacrylate)s (alkyl=methyl, ethyl, propyl, butyl, pentyl, hexyl, octyl) are presented. The step height Δcp decreases linearly with the number of n-alkyl C-atoms in the side chain. The usual glass step in the DSC curves, e. g. for poly(methylmethacrylate), degenerates to a bend near poly(n-octylmethacrylate). This finding is discussed as a result of a linear relation between the caloric relaxation strength Δcp and the temperature difference from the α onset Tonset in the splitting region of poly(n-alkylmethacrylate)s, with Δcp → 0 for T → Tonset. The number of monomeric units per cooperatively rearranging region at Tg decreases from PMMA (Nα∼20) to PnOMA (Nα<5). This demonstrates that the cooperativity at the α onset in poly(n-alkylmethacrylate)s is very small, as expected from a fluctuation approach to the glass transition. Wiley InterScience Backfile Collection 1832-2000 Hempel, E. oth Beiner, M. oth Renner, T. oth Donth, E. oth in Acta Polymerica Weinheim : Wiley-VCH 47(1996), Seite 525-529 (DE-627)NLEJ15907133X (DE-600)1474947-6 0323-7648 nnns volume:47 year:1996 month:11 pages:525-529 extent:5 http://dx.doi.org/10.1002/actp.1996.010471109 text/html Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-WIS GBV_NL_ARTICLE AR 47 1996 11-12 525-529 5 |
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linearity of heat capacity step near the onset of α glass transition in poly(n-alkylmethacrylate)s |
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Linearity of heat capacity step near the onset of α glass transition in poly(n-alkylmethacrylate)s |
| abstract |
DSC measurements around the glass transition in the homologous series of seven poly(n-alkylmethacrylate)s (alkyl=methyl, ethyl, propyl, butyl, pentyl, hexyl, octyl) are presented. The step height Δcp decreases linearly with the number of n-alkyl C-atoms in the side chain. The usual glass step in the DSC curves, e. g. for poly(methylmethacrylate), degenerates to a bend near poly(n-octylmethacrylate). This finding is discussed as a result of a linear relation between the caloric relaxation strength Δcp and the temperature difference from the α onset Tonset in the splitting region of poly(n-alkylmethacrylate)s, with Δcp → 0 for T → Tonset. The number of monomeric units per cooperatively rearranging region at Tg decreases from PMMA (Nα∼20) to PnOMA (Nα<5). This demonstrates that the cooperativity at the α onset in poly(n-alkylmethacrylate)s is very small, as expected from a fluctuation approach to the glass transition. |
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DSC measurements around the glass transition in the homologous series of seven poly(n-alkylmethacrylate)s (alkyl=methyl, ethyl, propyl, butyl, pentyl, hexyl, octyl) are presented. The step height Δcp decreases linearly with the number of n-alkyl C-atoms in the side chain. The usual glass step in the DSC curves, e. g. for poly(methylmethacrylate), degenerates to a bend near poly(n-octylmethacrylate). This finding is discussed as a result of a linear relation between the caloric relaxation strength Δcp and the temperature difference from the α onset Tonset in the splitting region of poly(n-alkylmethacrylate)s, with Δcp → 0 for T → Tonset. The number of monomeric units per cooperatively rearranging region at Tg decreases from PMMA (Nα∼20) to PnOMA (Nα<5). This demonstrates that the cooperativity at the α onset in poly(n-alkylmethacrylate)s is very small, as expected from a fluctuation approach to the glass transition. |
| abstract_unstemmed |
DSC measurements around the glass transition in the homologous series of seven poly(n-alkylmethacrylate)s (alkyl=methyl, ethyl, propyl, butyl, pentyl, hexyl, octyl) are presented. The step height Δcp decreases linearly with the number of n-alkyl C-atoms in the side chain. The usual glass step in the DSC curves, e. g. for poly(methylmethacrylate), degenerates to a bend near poly(n-octylmethacrylate). This finding is discussed as a result of a linear relation between the caloric relaxation strength Δcp and the temperature difference from the α onset Tonset in the splitting region of poly(n-alkylmethacrylate)s, with Δcp → 0 for T → Tonset. The number of monomeric units per cooperatively rearranging region at Tg decreases from PMMA (Nα∼20) to PnOMA (Nα<5). This demonstrates that the cooperativity at the α onset in poly(n-alkylmethacrylate)s is very small, as expected from a fluctuation approach to the glass transition. |
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<?xml version="1.0" encoding="UTF-8"?><collection xmlns="http://www.loc.gov/MARC21/slim"><record><leader>01000caa a22002652 4500</leader><controlfield tag="001">NLEJ163378525</controlfield><controlfield tag="003">DE-627</controlfield><controlfield tag="005">20210707113600.0</controlfield><controlfield tag="007">cr uuu---uuuuu</controlfield><controlfield tag="008">070201s1996 xx |||||o 00| ||eng c</controlfield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-627)NLEJ163378525</subfield></datafield><datafield tag="040" ind1=" " ind2=" "><subfield code="a">DE-627</subfield><subfield code="b">ger</subfield><subfield code="c">DE-627</subfield><subfield code="e">rakwb</subfield></datafield><datafield tag="041" ind1=" " ind2=" "><subfield code="a">eng</subfield></datafield><datafield tag="245" ind1="1" ind2="0"><subfield code="a">Linearity of heat capacity step near the onset of α glass transition in poly(n-alkylmethacrylate)s</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="c">1996</subfield></datafield><datafield tag="300" ind1=" " ind2=" "><subfield code="b">8 Ill.</subfield><subfield code="b">3 Tab.</subfield></datafield><datafield tag="300" ind1=" " ind2=" "><subfield code="a">5</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">nicht spezifiziert</subfield><subfield code="b">zzz</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">nicht spezifiziert</subfield><subfield code="b">z</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">nicht spezifiziert</subfield><subfield code="b">zu</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">DSC measurements around the glass transition in the homologous series of seven poly(n-alkylmethacrylate)s (alkyl=methyl, ethyl, propyl, butyl, pentyl, hexyl, octyl) are presented. The step height Δcp decreases linearly with the number of n-alkyl C-atoms in the side chain. The usual glass step in the DSC curves, e. g. for poly(methylmethacrylate), degenerates to a bend near poly(n-octylmethacrylate). This finding is discussed as a result of a linear relation between the caloric relaxation strength Δcp and the temperature difference from the α onset Tonset in the splitting region of poly(n-alkylmethacrylate)s, with Δcp → 0 for T → Tonset. The number of monomeric units per cooperatively rearranging region at Tg decreases from PMMA (Nα∼20) to PnOMA (Nα<5). This demonstrates that the cooperativity at the α onset in poly(n-alkylmethacrylate)s is very small, as expected from a fluctuation approach to the glass transition.</subfield></datafield><datafield tag="533" ind1=" " ind2=" "><subfield code="f">Wiley InterScience Backfile Collection 1832-2000</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Hempel, E.</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Beiner, M.</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Renner, T.</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Donth, E.</subfield><subfield code="4">oth</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">in</subfield><subfield code="t">Acta Polymerica</subfield><subfield code="d">Weinheim : Wiley-VCH</subfield><subfield code="g">47(1996), Seite 525-529</subfield><subfield code="w">(DE-627)NLEJ15907133X</subfield><subfield code="w">(DE-600)1474947-6</subfield><subfield code="x">0323-7648</subfield><subfield code="7">nnns</subfield></datafield><datafield tag="773" ind1="1" ind2="8"><subfield code="g">volume:47</subfield><subfield code="g">year:1996</subfield><subfield code="g">month:11</subfield><subfield code="g">pages:525-529</subfield><subfield code="g">extent:5</subfield></datafield><datafield tag="856" ind1="4" ind2="0"><subfield code="u">http://dx.doi.org/10.1002/actp.1996.010471109</subfield><subfield code="q">text/html</subfield><subfield code="z">Deutschlandweit zugänglich</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_USEFLAG_U</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">ZDB-1-WIS</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_NL_ARTICLE</subfield></datafield><datafield tag="951" ind1=" " ind2=" "><subfield code="a">AR</subfield></datafield><datafield tag="952" ind1=" " ind2=" "><subfield code="d">47</subfield><subfield code="j">1996</subfield><subfield code="c">11-12</subfield><subfield code="h">525-529</subfield><subfield code="g">5</subfield></datafield></record></collection>
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