Thermal decomposition of poly(sec-amyl methacrylate)
The thermal decomposition of poly(sec-amyl methacrylate) is studied by simultaneous thermogravimetry-gas chromatography-mass spectrometry and by pyrolysis-gas chromatography. The TG curve has four distinct breaks and a plateau. Results of the identification of the evolved gas at the individual break...
Ausführliche Beschreibung
Gespeichert in:
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E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
1985 |
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| Umfang: |
5 Ill. ; 2 Tab. 7 |
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| Reproduktion: |
Wiley InterScience Backfile Collection 1832-2000 |
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| Übergeordnetes Werk: |
in: Journal of Polymer Science: Polymer Chemistry Edition - New York : John Wiley & Sons, Inc., 23(1985) vom: Feb., Seite 343-349 |
| Übergeordnetes Werk: |
volume:23 ; year:1985 ; month:02 ; pages:343-349 ; extent:7 |
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| 520 | |a The thermal decomposition of poly(sec-amyl methacrylate) is studied by simultaneous thermogravimetry-gas chromatography-mass spectrometry and by pyrolysis-gas chromatography. The TG curve has four distinct breaks and a plateau. Results of the identification of the evolved gas at the individual breaks by GC-MS techniques lead to the conclusion that these breaks correspond to the individual processes in the decomposition mechanism like that of poly(tert-butyl methacrylate): the first break, the depolymerization initiated at the unsaturated chain ends; the second break, the depolymerization initiated at the saturated chain ends; the third break, the ester decomposition; the plateau, the inhibition of decomposition by the formation of poly(methacrylic anhydride); the fourth break, the decomposition of poly(methacrylic anhydride). The extent of ester decomposition is related to the substituent constants based on Hammett equation. The ester decomposition product is separated into three pentene isomers by pyrolysis-gas chromatography: trans-2-pentene, cis-2-pentene, and 1-pentene. As raising decomposition temperature, the composition ratio of trans-2-pentene decreases and becomes constant above 620 K, and the composition ratios of cis-2-pentene and 1-pentene increase and also become constant above 620 K. These results are accounted for by mobility of atoms included in the substituent at forming a ring transition state. | ||
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(DE-627)NLEJ163417520 DE-627 ger DE-627 rakwb eng Thermal decomposition of poly(sec-amyl methacrylate) 1985 5 Ill. 2 Tab. 7 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The thermal decomposition of poly(sec-amyl methacrylate) is studied by simultaneous thermogravimetry-gas chromatography-mass spectrometry and by pyrolysis-gas chromatography. The TG curve has four distinct breaks and a plateau. Results of the identification of the evolved gas at the individual breaks by GC-MS techniques lead to the conclusion that these breaks correspond to the individual processes in the decomposition mechanism like that of poly(tert-butyl methacrylate): the first break, the depolymerization initiated at the unsaturated chain ends; the second break, the depolymerization initiated at the saturated chain ends; the third break, the ester decomposition; the plateau, the inhibition of decomposition by the formation of poly(methacrylic anhydride); the fourth break, the decomposition of poly(methacrylic anhydride). The extent of ester decomposition is related to the substituent constants based on Hammett equation. The ester decomposition product is separated into three pentene isomers by pyrolysis-gas chromatography: trans-2-pentene, cis-2-pentene, and 1-pentene. As raising decomposition temperature, the composition ratio of trans-2-pentene decreases and becomes constant above 620 K, and the composition ratios of cis-2-pentene and 1-pentene increase and also become constant above 620 K. These results are accounted for by mobility of atoms included in the substituent at forming a ring transition state. Wiley InterScience Backfile Collection 1832-2000 Kojima, Takakazu oth Kurotu, Takuzo oth Masuda, Ken-Ichi oth Hosaka, Yoshinobu oth in Journal of Polymer Science: Polymer Chemistry Edition New York : John Wiley & Sons, Inc. 23(1985) vom: Feb., Seite 343-349 (DE-627)NLEJ159071348 0360-6376 nnns volume:23 year:1985 month:02 pages:343-349 extent:7 http://dx.doi.org/10.1002/pol.1985.170230210 text/html Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-WIS GBV_NL_ARTICLE AR 23 1985 2 343-349 7 |
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(DE-627)NLEJ163417520 DE-627 ger DE-627 rakwb eng Thermal decomposition of poly(sec-amyl methacrylate) 1985 5 Ill. 2 Tab. 7 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The thermal decomposition of poly(sec-amyl methacrylate) is studied by simultaneous thermogravimetry-gas chromatography-mass spectrometry and by pyrolysis-gas chromatography. The TG curve has four distinct breaks and a plateau. Results of the identification of the evolved gas at the individual breaks by GC-MS techniques lead to the conclusion that these breaks correspond to the individual processes in the decomposition mechanism like that of poly(tert-butyl methacrylate): the first break, the depolymerization initiated at the unsaturated chain ends; the second break, the depolymerization initiated at the saturated chain ends; the third break, the ester decomposition; the plateau, the inhibition of decomposition by the formation of poly(methacrylic anhydride); the fourth break, the decomposition of poly(methacrylic anhydride). The extent of ester decomposition is related to the substituent constants based on Hammett equation. The ester decomposition product is separated into three pentene isomers by pyrolysis-gas chromatography: trans-2-pentene, cis-2-pentene, and 1-pentene. As raising decomposition temperature, the composition ratio of trans-2-pentene decreases and becomes constant above 620 K, and the composition ratios of cis-2-pentene and 1-pentene increase and also become constant above 620 K. These results are accounted for by mobility of atoms included in the substituent at forming a ring transition state. Wiley InterScience Backfile Collection 1832-2000 Kojima, Takakazu oth Kurotu, Takuzo oth Masuda, Ken-Ichi oth Hosaka, Yoshinobu oth in Journal of Polymer Science: Polymer Chemistry Edition New York : John Wiley & Sons, Inc. 23(1985) vom: Feb., Seite 343-349 (DE-627)NLEJ159071348 0360-6376 nnns volume:23 year:1985 month:02 pages:343-349 extent:7 http://dx.doi.org/10.1002/pol.1985.170230210 text/html Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-WIS GBV_NL_ARTICLE AR 23 1985 2 343-349 7 |
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(DE-627)NLEJ163417520 DE-627 ger DE-627 rakwb eng Thermal decomposition of poly(sec-amyl methacrylate) 1985 5 Ill. 2 Tab. 7 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The thermal decomposition of poly(sec-amyl methacrylate) is studied by simultaneous thermogravimetry-gas chromatography-mass spectrometry and by pyrolysis-gas chromatography. The TG curve has four distinct breaks and a plateau. Results of the identification of the evolved gas at the individual breaks by GC-MS techniques lead to the conclusion that these breaks correspond to the individual processes in the decomposition mechanism like that of poly(tert-butyl methacrylate): the first break, the depolymerization initiated at the unsaturated chain ends; the second break, the depolymerization initiated at the saturated chain ends; the third break, the ester decomposition; the plateau, the inhibition of decomposition by the formation of poly(methacrylic anhydride); the fourth break, the decomposition of poly(methacrylic anhydride). The extent of ester decomposition is related to the substituent constants based on Hammett equation. The ester decomposition product is separated into three pentene isomers by pyrolysis-gas chromatography: trans-2-pentene, cis-2-pentene, and 1-pentene. As raising decomposition temperature, the composition ratio of trans-2-pentene decreases and becomes constant above 620 K, and the composition ratios of cis-2-pentene and 1-pentene increase and also become constant above 620 K. These results are accounted for by mobility of atoms included in the substituent at forming a ring transition state. Wiley InterScience Backfile Collection 1832-2000 Kojima, Takakazu oth Kurotu, Takuzo oth Masuda, Ken-Ichi oth Hosaka, Yoshinobu oth in Journal of Polymer Science: Polymer Chemistry Edition New York : John Wiley & Sons, Inc. 23(1985) vom: Feb., Seite 343-349 (DE-627)NLEJ159071348 0360-6376 nnns volume:23 year:1985 month:02 pages:343-349 extent:7 http://dx.doi.org/10.1002/pol.1985.170230210 text/html Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-WIS GBV_NL_ARTICLE AR 23 1985 2 343-349 7 |
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(DE-627)NLEJ163417520 DE-627 ger DE-627 rakwb eng Thermal decomposition of poly(sec-amyl methacrylate) 1985 5 Ill. 2 Tab. 7 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The thermal decomposition of poly(sec-amyl methacrylate) is studied by simultaneous thermogravimetry-gas chromatography-mass spectrometry and by pyrolysis-gas chromatography. The TG curve has four distinct breaks and a plateau. Results of the identification of the evolved gas at the individual breaks by GC-MS techniques lead to the conclusion that these breaks correspond to the individual processes in the decomposition mechanism like that of poly(tert-butyl methacrylate): the first break, the depolymerization initiated at the unsaturated chain ends; the second break, the depolymerization initiated at the saturated chain ends; the third break, the ester decomposition; the plateau, the inhibition of decomposition by the formation of poly(methacrylic anhydride); the fourth break, the decomposition of poly(methacrylic anhydride). The extent of ester decomposition is related to the substituent constants based on Hammett equation. The ester decomposition product is separated into three pentene isomers by pyrolysis-gas chromatography: trans-2-pentene, cis-2-pentene, and 1-pentene. As raising decomposition temperature, the composition ratio of trans-2-pentene decreases and becomes constant above 620 K, and the composition ratios of cis-2-pentene and 1-pentene increase and also become constant above 620 K. These results are accounted for by mobility of atoms included in the substituent at forming a ring transition state. Wiley InterScience Backfile Collection 1832-2000 Kojima, Takakazu oth Kurotu, Takuzo oth Masuda, Ken-Ichi oth Hosaka, Yoshinobu oth in Journal of Polymer Science: Polymer Chemistry Edition New York : John Wiley & Sons, Inc. 23(1985) vom: Feb., Seite 343-349 (DE-627)NLEJ159071348 0360-6376 nnns volume:23 year:1985 month:02 pages:343-349 extent:7 http://dx.doi.org/10.1002/pol.1985.170230210 text/html Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-WIS GBV_NL_ARTICLE AR 23 1985 2 343-349 7 |
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(DE-627)NLEJ163417520 DE-627 ger DE-627 rakwb eng Thermal decomposition of poly(sec-amyl methacrylate) 1985 5 Ill. 2 Tab. 7 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The thermal decomposition of poly(sec-amyl methacrylate) is studied by simultaneous thermogravimetry-gas chromatography-mass spectrometry and by pyrolysis-gas chromatography. The TG curve has four distinct breaks and a plateau. Results of the identification of the evolved gas at the individual breaks by GC-MS techniques lead to the conclusion that these breaks correspond to the individual processes in the decomposition mechanism like that of poly(tert-butyl methacrylate): the first break, the depolymerization initiated at the unsaturated chain ends; the second break, the depolymerization initiated at the saturated chain ends; the third break, the ester decomposition; the plateau, the inhibition of decomposition by the formation of poly(methacrylic anhydride); the fourth break, the decomposition of poly(methacrylic anhydride). The extent of ester decomposition is related to the substituent constants based on Hammett equation. The ester decomposition product is separated into three pentene isomers by pyrolysis-gas chromatography: trans-2-pentene, cis-2-pentene, and 1-pentene. As raising decomposition temperature, the composition ratio of trans-2-pentene decreases and becomes constant above 620 K, and the composition ratios of cis-2-pentene and 1-pentene increase and also become constant above 620 K. These results are accounted for by mobility of atoms included in the substituent at forming a ring transition state. Wiley InterScience Backfile Collection 1832-2000 Kojima, Takakazu oth Kurotu, Takuzo oth Masuda, Ken-Ichi oth Hosaka, Yoshinobu oth in Journal of Polymer Science: Polymer Chemistry Edition New York : John Wiley & Sons, Inc. 23(1985) vom: Feb., Seite 343-349 (DE-627)NLEJ159071348 0360-6376 nnns volume:23 year:1985 month:02 pages:343-349 extent:7 http://dx.doi.org/10.1002/pol.1985.170230210 text/html Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-WIS GBV_NL_ARTICLE AR 23 1985 2 343-349 7 |
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The thermal decomposition of poly(sec-amyl methacrylate) is studied by simultaneous thermogravimetry-gas chromatography-mass spectrometry and by pyrolysis-gas chromatography. The TG curve has four distinct breaks and a plateau. Results of the identification of the evolved gas at the individual breaks by GC-MS techniques lead to the conclusion that these breaks correspond to the individual processes in the decomposition mechanism like that of poly(tert-butyl methacrylate): the first break, the depolymerization initiated at the unsaturated chain ends; the second break, the depolymerization initiated at the saturated chain ends; the third break, the ester decomposition; the plateau, the inhibition of decomposition by the formation of poly(methacrylic anhydride); the fourth break, the decomposition of poly(methacrylic anhydride). The extent of ester decomposition is related to the substituent constants based on Hammett equation. The ester decomposition product is separated into three pentene isomers by pyrolysis-gas chromatography: trans-2-pentene, cis-2-pentene, and 1-pentene. As raising decomposition temperature, the composition ratio of trans-2-pentene decreases and becomes constant above 620 K, and the composition ratios of cis-2-pentene and 1-pentene increase and also become constant above 620 K. These results are accounted for by mobility of atoms included in the substituent at forming a ring transition state. |
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The thermal decomposition of poly(sec-amyl methacrylate) is studied by simultaneous thermogravimetry-gas chromatography-mass spectrometry and by pyrolysis-gas chromatography. The TG curve has four distinct breaks and a plateau. Results of the identification of the evolved gas at the individual breaks by GC-MS techniques lead to the conclusion that these breaks correspond to the individual processes in the decomposition mechanism like that of poly(tert-butyl methacrylate): the first break, the depolymerization initiated at the unsaturated chain ends; the second break, the depolymerization initiated at the saturated chain ends; the third break, the ester decomposition; the plateau, the inhibition of decomposition by the formation of poly(methacrylic anhydride); the fourth break, the decomposition of poly(methacrylic anhydride). The extent of ester decomposition is related to the substituent constants based on Hammett equation. The ester decomposition product is separated into three pentene isomers by pyrolysis-gas chromatography: trans-2-pentene, cis-2-pentene, and 1-pentene. As raising decomposition temperature, the composition ratio of trans-2-pentene decreases and becomes constant above 620 K, and the composition ratios of cis-2-pentene and 1-pentene increase and also become constant above 620 K. These results are accounted for by mobility of atoms included in the substituent at forming a ring transition state. |
| abstract_unstemmed |
The thermal decomposition of poly(sec-amyl methacrylate) is studied by simultaneous thermogravimetry-gas chromatography-mass spectrometry and by pyrolysis-gas chromatography. The TG curve has four distinct breaks and a plateau. Results of the identification of the evolved gas at the individual breaks by GC-MS techniques lead to the conclusion that these breaks correspond to the individual processes in the decomposition mechanism like that of poly(tert-butyl methacrylate): the first break, the depolymerization initiated at the unsaturated chain ends; the second break, the depolymerization initiated at the saturated chain ends; the third break, the ester decomposition; the plateau, the inhibition of decomposition by the formation of poly(methacrylic anhydride); the fourth break, the decomposition of poly(methacrylic anhydride). The extent of ester decomposition is related to the substituent constants based on Hammett equation. The ester decomposition product is separated into three pentene isomers by pyrolysis-gas chromatography: trans-2-pentene, cis-2-pentene, and 1-pentene. As raising decomposition temperature, the composition ratio of trans-2-pentene decreases and becomes constant above 620 K, and the composition ratios of cis-2-pentene and 1-pentene increase and also become constant above 620 K. These results are accounted for by mobility of atoms included in the substituent at forming a ring transition state. |
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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">NLEJ163417520</controlfield><controlfield tag="003">DE-627</controlfield><controlfield tag="005">20230506151826.0</controlfield><controlfield tag="007">cr uuu---uuuuu</controlfield><controlfield tag="008">070201s1985 xx |||||o 00| ||eng c</controlfield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-627)NLEJ163417520</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">Thermal decomposition of poly(sec-amyl methacrylate)</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="c">1985</subfield></datafield><datafield tag="300" ind1=" " ind2=" "><subfield code="b">5 Ill.</subfield><subfield code="b">2 Tab.</subfield></datafield><datafield tag="300" ind1=" " ind2=" "><subfield code="a">7</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">The thermal decomposition of poly(sec-amyl methacrylate) is studied by simultaneous thermogravimetry-gas chromatography-mass spectrometry and by pyrolysis-gas chromatography. The TG curve has four distinct breaks and a plateau. Results of the identification of the evolved gas at the individual breaks by GC-MS techniques lead to the conclusion that these breaks correspond to the individual processes in the decomposition mechanism like that of poly(tert-butyl methacrylate): the first break, the depolymerization initiated at the unsaturated chain ends; the second break, the depolymerization initiated at the saturated chain ends; the third break, the ester decomposition; the plateau, the inhibition of decomposition by the formation of poly(methacrylic anhydride); the fourth break, the decomposition of poly(methacrylic anhydride). The extent of ester decomposition is related to the substituent constants based on Hammett equation. The ester decomposition product is separated into three pentene isomers by pyrolysis-gas chromatography: trans-2-pentene, cis-2-pentene, and 1-pentene. As raising decomposition temperature, the composition ratio of trans-2-pentene decreases and becomes constant above 620 K, and the composition ratios of cis-2-pentene and 1-pentene increase and also become constant above 620 K. These results are accounted for by mobility of atoms included in the substituent at forming a ring transition state.</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">Kojima, Takakazu</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Kurotu, Takuzo</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Masuda, Ken-Ichi</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Hosaka, Yoshinobu</subfield><subfield code="4">oth</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">in</subfield><subfield code="t">Journal of Polymer Science: Polymer Chemistry Edition</subfield><subfield code="d">New York : John Wiley & Sons, Inc.</subfield><subfield code="g">23(1985) vom: Feb., Seite 343-349</subfield><subfield code="w">(DE-627)NLEJ159071348</subfield><subfield code="x">0360-6376</subfield><subfield code="7">nnns</subfield></datafield><datafield tag="773" ind1="1" ind2="8"><subfield code="g">volume:23</subfield><subfield code="g">year:1985</subfield><subfield code="g">month:02</subfield><subfield code="g">pages:343-349</subfield><subfield code="g">extent:7</subfield></datafield><datafield tag="856" ind1="4" ind2="0"><subfield code="u">http://dx.doi.org/10.1002/pol.1985.170230210</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">23</subfield><subfield code="j">1985</subfield><subfield code="c">2</subfield><subfield code="h">343-349</subfield><subfield code="g">7</subfield></datafield></record></collection>
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