High-pressure free-radical copolymerization of ethene and 2-ethylhexyl acrylate
The free‐radical copolymerization of ethene (E) and 2‐ethylhexyl acrylate (EHA) is studied between 150 and 250°C and at pressures from 1500 to 2500 bar. The reactions which were induced either thermally or laser‐photochemically are carried out in two types of continuously operated devices and also w...
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| Veröffentlicht in: | Macromolecular chemistry and physics 1996-12, Vol.197 (12), p.4119-4134 |
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| container_title | Macromolecular chemistry and physics |
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| creator | Buback, Michael Dröge, Thomas Herk, Alex Van Mähling, Frank-Olaf |
| description | The free‐radical copolymerization of ethene (E) and 2‐ethylhexyl acrylate (EHA) is studied between 150 and 250°C and at pressures from 1500 to 2500 bar. The reactions which were induced either thermally or laser‐photochemically are carried out in two types of continuously operated devices and also within a batch reactor. The precision in the determination of reactivity ratios is considered in detail for the continuous experiments taking the error structure of the copolymer composition measurement into account. The reactivity ratios rE and rEHA at 220°C and 2000 bar are found to be 0,050 ± 0,002 and 3,9 ± 0,9, respectively. From the ethene rich reaction mixtures rE is available with higher precision than is rEHA. The E/EHA reactivity ratios are found to be very close to literature data for the E/butyl acrylate (BA) copolymerization. Fitting of the combined data set, for E/EHA and E/BA, yields for the activation energy and activation volume of the ethene reactivity ratio EA(rE) = (11,9 −1,4+1,5) kJ · mol−1 and ΔV≠(rE) = ‐(8,2 ± 3,5) cm3 · mol−1, respectively. |
| doi_str_mv | 10.1002/macp.1996.021971212 |
| format | Article |
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Chem. Phys</addtitle><description>The free‐radical copolymerization of ethene (E) and 2‐ethylhexyl acrylate (EHA) is studied between 150 and 250°C and at pressures from 1500 to 2500 bar. The reactions which were induced either thermally or laser‐photochemically are carried out in two types of continuously operated devices and also within a batch reactor. The precision in the determination of reactivity ratios is considered in detail for the continuous experiments taking the error structure of the copolymer composition measurement into account. The reactivity ratios rE and rEHA at 220°C and 2000 bar are found to be 0,050 ± 0,002 and 3,9 ± 0,9, respectively. From the ethene rich reaction mixtures rE is available with higher precision than is rEHA. The E/EHA reactivity ratios are found to be very close to literature data for the E/butyl acrylate (BA) copolymerization. Fitting of the combined data set, for E/EHA and E/BA, yields for the activation energy and activation volume of the ethene reactivity ratio EA(rE) = (11,9 −1,4+1,5) kJ · mol−1 and ΔV≠(rE) = ‐(8,2 ± 3,5) cm3 · mol−1, respectively.</description><subject>Applied sciences</subject><subject>Copolymerization</subject><subject>Exact sciences and technology</subject><subject>Organic polymers</subject><subject>Physicochemistry of polymers</subject><subject>Preparation, kinetics, thermodynamics, mechanism and catalysts</subject><issn>1022-1352</issn><issn>1521-3935</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1996</creationdate><recordtype>article</recordtype><recordid>eNqNkE9Lw0AQxYMoWKufwEsOXrfubnazyUUoVVtpreIfBC_LZDNro2kTdiM2fnpTKsWjp3kD771hfkFwyuiAUcrPl2DqAUvTeEA5SxXjjO8FPSY5I1Eayf1OU84JiyQ_DI68f6eUJjRVveBuUrwtSO3Q-0-HoXWIxEFeGChDU9VV2S7RFd_QFNUqrGyIzQJXGMIqDznplrZc4LotQzCuLaHB4-DAQunx5Hf2g-frq6fRhMzuxjej4YwYwQQnNgcpeUxjtDxXVOUqkdCpVHCwAowyhlqbpCJnXDEUYGWWZZBZFBQzjKJ-EG17jau8d2h17YoluFYzqjdM9IaJ3jDROyZd6mybqsF3H1oHK1P4XZSLlCYi6WwXW9tXUWL7n2Z9Oxzd_71DtgWFb3C9KwD3oWMVKalf5mM9lZfT14c51Y_RD4DLhao</recordid><startdate>199612</startdate><enddate>199612</enddate><creator>Buback, Michael</creator><creator>Dröge, Thomas</creator><creator>Herk, Alex Van</creator><creator>Mähling, Frank-Olaf</creator><general>Hüthig & Wepf Verlag</general><general>Wiley</general><scope>BSCLL</scope><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>199612</creationdate><title>High-pressure free-radical copolymerization of ethene and 2-ethylhexyl acrylate</title><author>Buback, Michael ; Dröge, Thomas ; Herk, Alex Van ; Mähling, Frank-Olaf</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c4142-fda552606ef2d707d785a2d7942af4ac7cc0ff894d1271e4af5bbbabfe40ebe33</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1996</creationdate><topic>Applied sciences</topic><topic>Copolymerization</topic><topic>Exact sciences and technology</topic><topic>Organic polymers</topic><topic>Physicochemistry of polymers</topic><topic>Preparation, kinetics, thermodynamics, mechanism and catalysts</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Buback, Michael</creatorcontrib><creatorcontrib>Dröge, Thomas</creatorcontrib><creatorcontrib>Herk, Alex Van</creatorcontrib><creatorcontrib>Mähling, Frank-Olaf</creatorcontrib><collection>Istex</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><jtitle>Macromolecular chemistry and physics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Buback, Michael</au><au>Dröge, Thomas</au><au>Herk, Alex Van</au><au>Mähling, Frank-Olaf</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>High-pressure free-radical copolymerization of ethene and 2-ethylhexyl acrylate</atitle><jtitle>Macromolecular chemistry and physics</jtitle><addtitle>Macromol. Chem. Phys</addtitle><date>1996-12</date><risdate>1996</risdate><volume>197</volume><issue>12</issue><spage>4119</spage><epage>4134</epage><pages>4119-4134</pages><issn>1022-1352</issn><eissn>1521-3935</eissn><abstract>The free‐radical copolymerization of ethene (E) and 2‐ethylhexyl acrylate (EHA) is studied between 150 and 250°C and at pressures from 1500 to 2500 bar. The reactions which were induced either thermally or laser‐photochemically are carried out in two types of continuously operated devices and also within a batch reactor. The precision in the determination of reactivity ratios is considered in detail for the continuous experiments taking the error structure of the copolymer composition measurement into account. The reactivity ratios rE and rEHA at 220°C and 2000 bar are found to be 0,050 ± 0,002 and 3,9 ± 0,9, respectively. From the ethene rich reaction mixtures rE is available with higher precision than is rEHA. The E/EHA reactivity ratios are found to be very close to literature data for the E/butyl acrylate (BA) copolymerization. Fitting of the combined data set, for E/EHA and E/BA, yields for the activation energy and activation volume of the ethene reactivity ratio EA(rE) = (11,9 −1,4+1,5) kJ · mol−1 and ΔV≠(rE) = ‐(8,2 ± 3,5) cm3 · mol−1, respectively.</abstract><cop>Zug</cop><pub>Hüthig & Wepf Verlag</pub><doi>10.1002/macp.1996.021971212</doi><tpages>16</tpages><oa>free_for_read</oa></addata></record> |
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| ispartof | Macromolecular chemistry and physics, 1996-12, Vol.197 (12), p.4119-4134 |
| issn | 1022-1352 1521-3935 |
| language | eng |
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| source | Wiley Journals |
| subjects | Applied sciences Copolymerization Exact sciences and technology Organic polymers Physicochemistry of polymers Preparation, kinetics, thermodynamics, mechanism and catalysts |
| title | High-pressure free-radical copolymerization of ethene and 2-ethylhexyl acrylate |
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