Polymerization of isoprene in n-heptane with triethylaluminum-titanium tetrachloride catalyst. I. Effect of Al/Ti ratio on stereoregularity, conversion, molecular weight, and molecular weight distribution
The influence of the Al/Ti ratio of the heterogeneous Ziegler–Natta catalyst system AlEt3–TiCl4 on the isoprene polymerization in n‐heptane at 30°C in a bench scale reactor was investigated. Each batch run consisted of 50 mL isoprene, 200 mL n‐heptane with 0.45 and 0.5g catalyst. Conversion of isopr...
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| Veröffentlicht in: | Journal of applied polymer science 1989-08, Vol.38 (3), p.477-482 |
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| container_title | Journal of applied polymer science |
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| creator | Al-Jarrah, Mustafa M. F. Abdul-Latif, Numan A. Al-Madfai, Suham H. F. Apikian, Rita L. |
| description | The influence of the Al/Ti ratio of the heterogeneous Ziegler–Natta catalyst system AlEt3–TiCl4 on the isoprene polymerization in n‐heptane at 30°C in a bench scale reactor was investigated. Each batch run consisted of 50 mL isoprene, 200 mL n‐heptane with 0.45 and 0.5g catalyst. Conversion of isoprene and molecular weights of polyisoprene increased with increasing Al/Ti ratio, reaching their maxima values at 1.0 and 1.2, respectively. Conversion and molecular weights decreased remarkably at a higher ratio of Al/Ti. As this ratio decreases from the value of 1.2 to 0.4, the cis1,4 content in polyisoprene decreased from 97 to 25%. When the ratio of Al/Ti increased from 1.2 to 2.2 the cis‐1,4 structure of polyisoprene decreased from 97 to 85%. |
| doi_str_mv | 10.1002/app.1989.070380307 |
| format | Article |
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I. Effect of Al/Ti ratio on stereoregularity, conversion, molecular weight, and molecular weight distribution</title><source>Wiley Online Library - AutoHoldings Journals</source><creator>Al-Jarrah, Mustafa M. F. ; Abdul-Latif, Numan A. ; Al-Madfai, Suham H. F. ; Apikian, Rita L.</creator><creatorcontrib>Al-Jarrah, Mustafa M. F. ; Abdul-Latif, Numan A. ; Al-Madfai, Suham H. F. ; Apikian, Rita L.</creatorcontrib><description>The influence of the Al/Ti ratio of the heterogeneous Ziegler–Natta catalyst system AlEt3–TiCl4 on the isoprene polymerization in n‐heptane at 30°C in a bench scale reactor was investigated. Each batch run consisted of 50 mL isoprene, 200 mL n‐heptane with 0.45 and 0.5g catalyst. Conversion of isoprene and molecular weights of polyisoprene increased with increasing Al/Ti ratio, reaching their maxima values at 1.0 and 1.2, respectively. Conversion and molecular weights decreased remarkably at a higher ratio of Al/Ti. As this ratio decreases from the value of 1.2 to 0.4, the cis1,4 content in polyisoprene decreased from 97 to 25%. When the ratio of Al/Ti increased from 1.2 to 2.2 the cis‐1,4 structure of polyisoprene decreased from 97 to 85%.</description><identifier>ISSN: 0021-8995</identifier><identifier>EISSN: 1097-4628</identifier><identifier>DOI: 10.1002/app.1989.070380307</identifier><identifier>CODEN: JAPNAB</identifier><language>eng</language><publisher>New York: Wiley Subscription Services, Inc., A Wiley Company</publisher><subject>Applied sciences ; Exact sciences and technology ; Organic polymers ; Physicochemistry of polymers ; Polymerization ; Preparation, kinetics, thermodynamics, mechanism and catalysts</subject><ispartof>Journal of applied polymer science, 1989-08, Vol.38 (3), p.477-482</ispartof><rights>Copyright © 1989 John Wiley & Sons, Inc.</rights><rights>1990 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><cites>FETCH-LOGICAL-c2317-2a5cf3afc7b49d05a2fd3eba853786b93de5dfa129962df5f09d7e043cccee963</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1002%2Fapp.1989.070380307$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1002%2Fapp.1989.070380307$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,778,782,1414,27907,27908,45557,45558</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=6618323$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Al-Jarrah, Mustafa M. F.</creatorcontrib><creatorcontrib>Abdul-Latif, Numan A.</creatorcontrib><creatorcontrib>Al-Madfai, Suham H. F.</creatorcontrib><creatorcontrib>Apikian, Rita L.</creatorcontrib><title>Polymerization of isoprene in n-heptane with triethylaluminum-titanium tetrachloride catalyst. I. Effect of Al/Ti ratio on stereoregularity, conversion, molecular weight, and molecular weight distribution</title><title>Journal of applied polymer science</title><addtitle>J. Appl. Polym. Sci</addtitle><description>The influence of the Al/Ti ratio of the heterogeneous Ziegler–Natta catalyst system AlEt3–TiCl4 on the isoprene polymerization in n‐heptane at 30°C in a bench scale reactor was investigated. Each batch run consisted of 50 mL isoprene, 200 mL n‐heptane with 0.45 and 0.5g catalyst. Conversion of isoprene and molecular weights of polyisoprene increased with increasing Al/Ti ratio, reaching their maxima values at 1.0 and 1.2, respectively. Conversion and molecular weights decreased remarkably at a higher ratio of Al/Ti. As this ratio decreases from the value of 1.2 to 0.4, the cis1,4 content in polyisoprene decreased from 97 to 25%. When the ratio of Al/Ti increased from 1.2 to 2.2 the cis‐1,4 structure of polyisoprene decreased from 97 to 85%.</description><subject>Applied sciences</subject><subject>Exact sciences and technology</subject><subject>Organic polymers</subject><subject>Physicochemistry of polymers</subject><subject>Polymerization</subject><subject>Preparation, kinetics, thermodynamics, mechanism and catalysts</subject><issn>0021-8995</issn><issn>1097-4628</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1989</creationdate><recordtype>article</recordtype><recordid>eNqNUcuO0zAUjRBIlIEfYOUFyyZjx83DEpsyMx1GGkGRBrG0bp3ricF5yHYo4Rv5KBwVVUhsWF353vOST5K8ZjRjlOaXMI4ZE7XIaEV5TTmtniQrRkWVbsq8fpqsIoiltRDF8-SF918pZayg5Sr5tR_s3KEzPyGYoSeDJsYPo8MeielJn7Y4BoiPowktCc5gaGcLdupMP3VpMPFopo4EDA5UawdnGiQKAtjZh4zcZeRGa1RhUd7aywdD3OJEopcP6HBw-DhZcCbMa6KG_js6H4OsSTdYVMuFHNE8tmFNoG_-2ZLG-JjqMC3pXybPNFiPr_7Mi-Tz7ubh6n16__H27mp7n6qcsyrNoVCag1bVYSMaWkCuG44HqAte1eVB8AaLRgPLhSjzRheaiqZCuuFKKURR8oskP-kqN3jvUMvRmQ7cLBmVSx8y9iGXPuS5j0h6cyKN4BVY7aBXxp-ZZclqnvMIe3uCHY3F-T-E5Xa__9slPdHjt-CPMx3cN1lWvCrklw-3cid2n_bvrpkU_DdPh7Ow</recordid><startdate>19890805</startdate><enddate>19890805</enddate><creator>Al-Jarrah, Mustafa M. 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F.</creatorcontrib><creatorcontrib>Apikian, Rita L.</creatorcontrib><collection>Istex</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><jtitle>Journal of applied polymer science</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Al-Jarrah, Mustafa M. F.</au><au>Abdul-Latif, Numan A.</au><au>Al-Madfai, Suham H. F.</au><au>Apikian, Rita L.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Polymerization of isoprene in n-heptane with triethylaluminum-titanium tetrachloride catalyst. I. Effect of Al/Ti ratio on stereoregularity, conversion, molecular weight, and molecular weight distribution</atitle><jtitle>Journal of applied polymer science</jtitle><addtitle>J. Appl. Polym. Sci</addtitle><date>1989-08-05</date><risdate>1989</risdate><volume>38</volume><issue>3</issue><spage>477</spage><epage>482</epage><pages>477-482</pages><issn>0021-8995</issn><eissn>1097-4628</eissn><coden>JAPNAB</coden><abstract>The influence of the Al/Ti ratio of the heterogeneous Ziegler–Natta catalyst system AlEt3–TiCl4 on the isoprene polymerization in n‐heptane at 30°C in a bench scale reactor was investigated. Each batch run consisted of 50 mL isoprene, 200 mL n‐heptane with 0.45 and 0.5g catalyst. Conversion of isoprene and molecular weights of polyisoprene increased with increasing Al/Ti ratio, reaching their maxima values at 1.0 and 1.2, respectively. Conversion and molecular weights decreased remarkably at a higher ratio of Al/Ti. As this ratio decreases from the value of 1.2 to 0.4, the cis1,4 content in polyisoprene decreased from 97 to 25%. When the ratio of Al/Ti increased from 1.2 to 2.2 the cis‐1,4 structure of polyisoprene decreased from 97 to 85%.</abstract><cop>New York</cop><pub>Wiley Subscription Services, Inc., A Wiley Company</pub><doi>10.1002/app.1989.070380307</doi><tpages>6</tpages></addata></record> |
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| ispartof | Journal of applied polymer science, 1989-08, Vol.38 (3), p.477-482 |
| issn | 0021-8995 1097-4628 |
| language | eng |
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| source | Wiley Online Library - AutoHoldings Journals |
| subjects | Applied sciences Exact sciences and technology Organic polymers Physicochemistry of polymers Polymerization Preparation, kinetics, thermodynamics, mechanism and catalysts |
| title | Polymerization of isoprene in n-heptane with triethylaluminum-titanium tetrachloride catalyst. I. Effect of Al/Ti ratio on stereoregularity, conversion, molecular weight, and molecular weight distribution |
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