Determination of Free-Radical Propagation Rate Coefficients for Alkyl Methacrylates by Pulsed-Laser Polymerization
Values of free-radical propagation rate coefficients (k p) for two new methacrylate monomers2-ethylhexyl and isodecyl methacrylateshave been measured in the temperature range 10−90 °C by analyzing molecular weight distributions of polymer produced by pulsed-laser polymerization (the PLP/MWD techni...
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| Veröffentlicht in: | Macromolecules 1997-06, Vol.30 (12), p.3490-3493 |
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| container_title | Macromolecules |
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| creator | Hutchinson, R. A Beuermann, S Paquet, D. A McMinn, J. H |
| description | Values of free-radical propagation rate coefficients (k p) for two new methacrylate monomers2-ethylhexyl and isodecyl methacrylateshave been measured in the temperature range 10−90 °C by analyzing molecular weight distributions of polymer produced by pulsed-laser polymerization (the PLP/MWD technique). In addition, new PLP/MWD results for n-butyl and n-dodecyl methacrylates are reported, and previously published data for ethyl and isobutyl methacrylates are reanalyzed. The temperature dependence of k p for these six monomers is compared to that recently reported for methyl methacrylate. A consistent increase of k p with size of the ester group is observed, with values for n-dodecyl methacrylate 50−60% higher than those for methyl methacrylate. Although this increase is statistically significant, it is less certain whether it is attributable to a decrease in the activation energy or an increase in the frequency factor. The experimental results favor the former explanation. |
| doi_str_mv | 10.1021/ma970176u |
| format | Article |
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A ; Beuermann, S ; Paquet, D. A ; McMinn, J. H</creator><creatorcontrib>Hutchinson, R. A ; Beuermann, S ; Paquet, D. A ; McMinn, J. H</creatorcontrib><description>Values of free-radical propagation rate coefficients (k p) for two new methacrylate monomers2-ethylhexyl and isodecyl methacrylateshave been measured in the temperature range 10−90 °C by analyzing molecular weight distributions of polymer produced by pulsed-laser polymerization (the PLP/MWD technique). In addition, new PLP/MWD results for n-butyl and n-dodecyl methacrylates are reported, and previously published data for ethyl and isobutyl methacrylates are reanalyzed. The temperature dependence of k p for these six monomers is compared to that recently reported for methyl methacrylate. A consistent increase of k p with size of the ester group is observed, with values for n-dodecyl methacrylate 50−60% higher than those for methyl methacrylate. Although this increase is statistically significant, it is less certain whether it is attributable to a decrease in the activation energy or an increase in the frequency factor. The experimental results favor the former explanation.</description><identifier>ISSN: 0024-9297</identifier><identifier>EISSN: 1520-5835</identifier><identifier>DOI: 10.1021/ma970176u</identifier><identifier>CODEN: MAMOBX</identifier><language>eng</language><publisher>Washington, DC: American Chemical Society</publisher><subject>Applied sciences ; Exact sciences and technology ; Physicochemistry of polymers ; Polymerization ; Polymers and radiations</subject><ispartof>Macromolecules, 1997-06, Vol.30 (12), p.3490-3493</ispartof><rights>Copyright © 1997 American Chemical Society</rights><rights>1997 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a390t-b06aa4b19bbeebfcdb00a515b0cbc3a52e4b278a455eee345a3c31724e6e94553</citedby><cites>FETCH-LOGICAL-a390t-b06aa4b19bbeebfcdb00a515b0cbc3a52e4b278a455eee345a3c31724e6e94553</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://pubs.acs.org/doi/pdf/10.1021/ma970176u$$EPDF$$P50$$Gacs$$H</linktopdf><linktohtml>$$Uhttps://pubs.acs.org/doi/10.1021/ma970176u$$EHTML$$P50$$Gacs$$H</linktohtml><link.rule.ids>314,780,784,2765,27076,27924,27925,56738,56788</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=2701522$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Hutchinson, R. A</creatorcontrib><creatorcontrib>Beuermann, S</creatorcontrib><creatorcontrib>Paquet, D. A</creatorcontrib><creatorcontrib>McMinn, J. H</creatorcontrib><title>Determination of Free-Radical Propagation Rate Coefficients for Alkyl Methacrylates by Pulsed-Laser Polymerization</title><title>Macromolecules</title><addtitle>Macromolecules</addtitle><description>Values of free-radical propagation rate coefficients (k p) for two new methacrylate monomers2-ethylhexyl and isodecyl methacrylateshave been measured in the temperature range 10−90 °C by analyzing molecular weight distributions of polymer produced by pulsed-laser polymerization (the PLP/MWD technique). In addition, new PLP/MWD results for n-butyl and n-dodecyl methacrylates are reported, and previously published data for ethyl and isobutyl methacrylates are reanalyzed. The temperature dependence of k p for these six monomers is compared to that recently reported for methyl methacrylate. A consistent increase of k p with size of the ester group is observed, with values for n-dodecyl methacrylate 50−60% higher than those for methyl methacrylate. Although this increase is statistically significant, it is less certain whether it is attributable to a decrease in the activation energy or an increase in the frequency factor. The experimental results favor the former explanation.</description><subject>Applied sciences</subject><subject>Exact sciences and technology</subject><subject>Physicochemistry of polymers</subject><subject>Polymerization</subject><subject>Polymers and radiations</subject><issn>0024-9297</issn><issn>1520-5835</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1997</creationdate><recordtype>article</recordtype><recordid>eNptkEtPwzAQhC0EEuVx4B_4AAcOAT_ipjmW8pSKKKUIxMVauxswpEllpxLh12MI6onTSjvfzmqGkAPOTjgT_HQBecZ41l9tkB5XgiVqINUm6TEm0iQXebZNdkJ4Z4xzlcoe8efYoF-4ChpXV7Qu6KVHTKYwdxZKOvH1El47bQoN0lGNReGsw6oJtKg9HZYfbUlvsXkD69syMoGalk5WZcB5MoaAnk7qsl2gd1-_Rntkq4Co7v_NXfJ4eTEbXSfju6ub0XCcgMxZkxjWB0gNz41BNIWdG8ZAcWWYNVaCEpgakQ0gVQoRZapAWskzkWIf87iUu-S487W-DsFjoZfeLcC3mjP9U5ZelxXZw45dQoi5Cw-VdWF9ICKmhIhY0mEuNPi5lsF_6H4mM6VnkwedPz2f3U9fZlpG_qjjwQb9Xq98FQP_8_4bIJKHTQ</recordid><startdate>19970616</startdate><enddate>19970616</enddate><creator>Hutchinson, R. 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H</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a390t-b06aa4b19bbeebfcdb00a515b0cbc3a52e4b278a455eee345a3c31724e6e94553</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1997</creationdate><topic>Applied sciences</topic><topic>Exact sciences and technology</topic><topic>Physicochemistry of polymers</topic><topic>Polymerization</topic><topic>Polymers and radiations</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Hutchinson, R. A</creatorcontrib><creatorcontrib>Beuermann, S</creatorcontrib><creatorcontrib>Paquet, D. A</creatorcontrib><creatorcontrib>McMinn, J. H</creatorcontrib><collection>Istex</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><jtitle>Macromolecules</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Hutchinson, R. A</au><au>Beuermann, S</au><au>Paquet, D. A</au><au>McMinn, J. H</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Determination of Free-Radical Propagation Rate Coefficients for Alkyl Methacrylates by Pulsed-Laser Polymerization</atitle><jtitle>Macromolecules</jtitle><addtitle>Macromolecules</addtitle><date>1997-06-16</date><risdate>1997</risdate><volume>30</volume><issue>12</issue><spage>3490</spage><epage>3493</epage><pages>3490-3493</pages><issn>0024-9297</issn><eissn>1520-5835</eissn><coden>MAMOBX</coden><abstract>Values of free-radical propagation rate coefficients (k p) for two new methacrylate monomers2-ethylhexyl and isodecyl methacrylateshave been measured in the temperature range 10−90 °C by analyzing molecular weight distributions of polymer produced by pulsed-laser polymerization (the PLP/MWD technique). In addition, new PLP/MWD results for n-butyl and n-dodecyl methacrylates are reported, and previously published data for ethyl and isobutyl methacrylates are reanalyzed. The temperature dependence of k p for these six monomers is compared to that recently reported for methyl methacrylate. A consistent increase of k p with size of the ester group is observed, with values for n-dodecyl methacrylate 50−60% higher than those for methyl methacrylate. Although this increase is statistically significant, it is less certain whether it is attributable to a decrease in the activation energy or an increase in the frequency factor. The experimental results favor the former explanation.</abstract><cop>Washington, DC</cop><pub>American Chemical Society</pub><doi>10.1021/ma970176u</doi><tpages>4</tpages></addata></record> |
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| source | ACS Publications |
| subjects | Applied sciences Exact sciences and technology Physicochemistry of polymers Polymerization Polymers and radiations |
| title | Determination of Free-Radical Propagation Rate Coefficients for Alkyl Methacrylates by Pulsed-Laser Polymerization |
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