Effect of Isotacticity on Formation of Mesomorphic Phase of Isotactic Polypropylene
The effect of isotacticity on the mesomorphic phase-forming properties of isotactic polypropylene (iPP) is reported. Only iPP having high isotacticity (iPP-HT) can form the mesomorphic phase by a rapid quench, but iPP having low isotacticity (iPP-LT) cannot form the mesomorphic phase though it cryst...
Gespeichert in:
| Veröffentlicht in: | Macromolecules 2005-10, Vol.38 (21), p.8749-8754 |
|---|---|
| Hauptverfasser: | , , , |
| Format: | Artikel |
| Sprache: | eng |
| Schlagworte: | |
| Online-Zugang: | Volltext |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| container_end_page | 8754 |
|---|---|
| container_issue | 21 |
| container_start_page | 8749 |
| container_title | Macromolecules |
| container_volume | 38 |
| creator | Konishi, Takashi Nishida, Koji Kanaya, Toshiji Kaji, Keisuke |
| description | The effect of isotacticity on the mesomorphic phase-forming properties of isotactic polypropylene (iPP) is reported. Only iPP having high isotacticity (iPP-HT) can form the mesomorphic phase by a rapid quench, but iPP having low isotacticity (iPP-LT) cannot form the mesomorphic phase though it crystallizes by the same quenching rate. These results suggest that the mesomorphic phase of iPP is closely related to the stereoregularity of the polymer chain. The mesomorphic phase in the iPP-HT shows longer regular 3/1 helices than in the crystalline iPP-LT. The structure and formation mechanism of the mesomorphic iPP are considered analogous to those of liquid crystals since the average length of the long regular 3/1 helices in the mesomorphic iPP acting as rodlike segments is sufficiently large to fulfill a criterion for the formation of liquid crystalline phase. From this criterion, the minimum requirement of isotacticity to form the mesomorphic phase is also estimated. |
| doi_str_mv | 10.1021/ma050908f |
| format | Article |
| fullrecord | <record><control><sourceid>acs_cross</sourceid><recordid>TN_cdi_crossref_primary_10_1021_ma050908f</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>a248196951</sourcerecordid><originalsourceid>FETCH-LOGICAL-a399t-f6f41ca0b5b55ad8f5c297489a87f3131ebffa9c004c45fad76d50650c64aade3</originalsourceid><addsrcrecordid>eNptkEFLw0AQhRdRsFYP_oNcPHiIzia7SfYopdWCYkE9h-lkh6Yk2bAbD_n3RioWwdMMzPce854Q1xLuJCTyvkXQYKDgEzGTOoFYF6k-FTOARMUmMfm5uAhhDyClVulMvC2ZLQ2R42gd3IA01FQPY-S6aOV8i0M9bdPxxQbXOt_vaoo2Owz2jyLauGbsvevHxnb2UpwxNsFe_cy5-Fgt3xdP8fPr43rx8BxjaswQc8ZKEsJWb7XGqmBN03-qMFjknMpU2i0zGgJQpDRjlWeVhkwDZQqxsulc3B58ybsQvOWy93WLfiwllN9tlL9tTOzNge0xEDbssaM6HAV5IhUoeeSQQrl3n76bEvzj9wXwrmwz</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype></control><display><type>article</type><title>Effect of Isotacticity on Formation of Mesomorphic Phase of Isotactic Polypropylene</title><source>ACS Publications</source><creator>Konishi, Takashi ; Nishida, Koji ; Kanaya, Toshiji ; Kaji, Keisuke</creator><creatorcontrib>Konishi, Takashi ; Nishida, Koji ; Kanaya, Toshiji ; Kaji, Keisuke</creatorcontrib><description>The effect of isotacticity on the mesomorphic phase-forming properties of isotactic polypropylene (iPP) is reported. Only iPP having high isotacticity (iPP-HT) can form the mesomorphic phase by a rapid quench, but iPP having low isotacticity (iPP-LT) cannot form the mesomorphic phase though it crystallizes by the same quenching rate. These results suggest that the mesomorphic phase of iPP is closely related to the stereoregularity of the polymer chain. The mesomorphic phase in the iPP-HT shows longer regular 3/1 helices than in the crystalline iPP-LT. The structure and formation mechanism of the mesomorphic iPP are considered analogous to those of liquid crystals since the average length of the long regular 3/1 helices in the mesomorphic iPP acting as rodlike segments is sufficiently large to fulfill a criterion for the formation of liquid crystalline phase. From this criterion, the minimum requirement of isotacticity to form the mesomorphic phase is also estimated.</description><identifier>ISSN: 0024-9297</identifier><identifier>EISSN: 1520-5835</identifier><identifier>DOI: 10.1021/ma050908f</identifier><identifier>CODEN: MAMOBX</identifier><language>eng</language><publisher>Washington, DC: American Chemical Society</publisher><subject>Applied sciences ; Crystallization ; Exact sciences and technology ; Organic polymers ; Physicochemistry of polymers ; Properties and characterization</subject><ispartof>Macromolecules, 2005-10, Vol.38 (21), p.8749-8754</ispartof><rights>Copyright © 2005 American Chemical Society</rights><rights>2005 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a399t-f6f41ca0b5b55ad8f5c297489a87f3131ebffa9c004c45fad76d50650c64aade3</citedby><cites>FETCH-LOGICAL-a399t-f6f41ca0b5b55ad8f5c297489a87f3131ebffa9c004c45fad76d50650c64aade3</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/ma050908f$$EPDF$$P50$$Gacs$$H</linktopdf><linktohtml>$$Uhttps://pubs.acs.org/doi/10.1021/ma050908f$$EHTML$$P50$$Gacs$$H</linktohtml><link.rule.ids>314,778,782,2754,27063,27911,27912,56725,56775</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=17214041$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Konishi, Takashi</creatorcontrib><creatorcontrib>Nishida, Koji</creatorcontrib><creatorcontrib>Kanaya, Toshiji</creatorcontrib><creatorcontrib>Kaji, Keisuke</creatorcontrib><title>Effect of Isotacticity on Formation of Mesomorphic Phase of Isotactic Polypropylene</title><title>Macromolecules</title><addtitle>Macromolecules</addtitle><description>The effect of isotacticity on the mesomorphic phase-forming properties of isotactic polypropylene (iPP) is reported. Only iPP having high isotacticity (iPP-HT) can form the mesomorphic phase by a rapid quench, but iPP having low isotacticity (iPP-LT) cannot form the mesomorphic phase though it crystallizes by the same quenching rate. These results suggest that the mesomorphic phase of iPP is closely related to the stereoregularity of the polymer chain. The mesomorphic phase in the iPP-HT shows longer regular 3/1 helices than in the crystalline iPP-LT. The structure and formation mechanism of the mesomorphic iPP are considered analogous to those of liquid crystals since the average length of the long regular 3/1 helices in the mesomorphic iPP acting as rodlike segments is sufficiently large to fulfill a criterion for the formation of liquid crystalline phase. From this criterion, the minimum requirement of isotacticity to form the mesomorphic phase is also estimated.</description><subject>Applied sciences</subject><subject>Crystallization</subject><subject>Exact sciences and technology</subject><subject>Organic polymers</subject><subject>Physicochemistry of polymers</subject><subject>Properties and characterization</subject><issn>0024-9297</issn><issn>1520-5835</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2005</creationdate><recordtype>article</recordtype><recordid>eNptkEFLw0AQhRdRsFYP_oNcPHiIzia7SfYopdWCYkE9h-lkh6Yk2bAbD_n3RioWwdMMzPce854Q1xLuJCTyvkXQYKDgEzGTOoFYF6k-FTOARMUmMfm5uAhhDyClVulMvC2ZLQ2R42gd3IA01FQPY-S6aOV8i0M9bdPxxQbXOt_vaoo2Owz2jyLauGbsvevHxnb2UpwxNsFe_cy5-Fgt3xdP8fPr43rx8BxjaswQc8ZKEsJWb7XGqmBN03-qMFjknMpU2i0zGgJQpDRjlWeVhkwDZQqxsulc3B58ybsQvOWy93WLfiwllN9tlL9tTOzNge0xEDbssaM6HAV5IhUoeeSQQrl3n76bEvzj9wXwrmwz</recordid><startdate>20051018</startdate><enddate>20051018</enddate><creator>Konishi, Takashi</creator><creator>Nishida, Koji</creator><creator>Kanaya, Toshiji</creator><creator>Kaji, Keisuke</creator><general>American Chemical Society</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>20051018</creationdate><title>Effect of Isotacticity on Formation of Mesomorphic Phase of Isotactic Polypropylene</title><author>Konishi, Takashi ; Nishida, Koji ; Kanaya, Toshiji ; Kaji, Keisuke</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a399t-f6f41ca0b5b55ad8f5c297489a87f3131ebffa9c004c45fad76d50650c64aade3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2005</creationdate><topic>Applied sciences</topic><topic>Crystallization</topic><topic>Exact sciences and technology</topic><topic>Organic polymers</topic><topic>Physicochemistry of polymers</topic><topic>Properties and characterization</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Konishi, Takashi</creatorcontrib><creatorcontrib>Nishida, Koji</creatorcontrib><creatorcontrib>Kanaya, Toshiji</creatorcontrib><creatorcontrib>Kaji, Keisuke</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><jtitle>Macromolecules</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Konishi, Takashi</au><au>Nishida, Koji</au><au>Kanaya, Toshiji</au><au>Kaji, Keisuke</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effect of Isotacticity on Formation of Mesomorphic Phase of Isotactic Polypropylene</atitle><jtitle>Macromolecules</jtitle><addtitle>Macromolecules</addtitle><date>2005-10-18</date><risdate>2005</risdate><volume>38</volume><issue>21</issue><spage>8749</spage><epage>8754</epage><pages>8749-8754</pages><issn>0024-9297</issn><eissn>1520-5835</eissn><coden>MAMOBX</coden><abstract>The effect of isotacticity on the mesomorphic phase-forming properties of isotactic polypropylene (iPP) is reported. Only iPP having high isotacticity (iPP-HT) can form the mesomorphic phase by a rapid quench, but iPP having low isotacticity (iPP-LT) cannot form the mesomorphic phase though it crystallizes by the same quenching rate. These results suggest that the mesomorphic phase of iPP is closely related to the stereoregularity of the polymer chain. The mesomorphic phase in the iPP-HT shows longer regular 3/1 helices than in the crystalline iPP-LT. The structure and formation mechanism of the mesomorphic iPP are considered analogous to those of liquid crystals since the average length of the long regular 3/1 helices in the mesomorphic iPP acting as rodlike segments is sufficiently large to fulfill a criterion for the formation of liquid crystalline phase. From this criterion, the minimum requirement of isotacticity to form the mesomorphic phase is also estimated.</abstract><cop>Washington, DC</cop><pub>American Chemical Society</pub><doi>10.1021/ma050908f</doi><tpages>6</tpages></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0024-9297 |
| ispartof | Macromolecules, 2005-10, Vol.38 (21), p.8749-8754 |
| issn | 0024-9297 1520-5835 |
| language | eng |
| recordid | cdi_crossref_primary_10_1021_ma050908f |
| source | ACS Publications |
| subjects | Applied sciences Crystallization Exact sciences and technology Organic polymers Physicochemistry of polymers Properties and characterization |
| title | Effect of Isotacticity on Formation of Mesomorphic Phase of Isotactic Polypropylene |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-01-16T01%3A30%3A13IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-acs_cross&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Effect%20of%20Isotacticity%20on%20Formation%20of%20Mesomorphic%20Phase%20of%20Isotactic%20Polypropylene&rft.jtitle=Macromolecules&rft.au=Konishi,%20Takashi&rft.date=2005-10-18&rft.volume=38&rft.issue=21&rft.spage=8749&rft.epage=8754&rft.pages=8749-8754&rft.issn=0024-9297&rft.eissn=1520-5835&rft.coden=MAMOBX&rft_id=info:doi/10.1021/ma050908f&rft_dat=%3Cacs_cross%3Ea248196951%3C/acs_cross%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_id=info:pmid/&rfr_iscdi=true |