Effect of diisocyanate structures on the properties of liquid crystalline polyurethanes
Thermotropic liquid crystalline polyurethanes (LCPUs) were synthesized through the polyaddition reaction of 2,4‐toluene diisocyanate (2,4‐TDI), 4,4′‐diphenylmethane diisocyanate (MDI), or o‐toluidine diisocyanate (ODI) with 4,4′‐bis(6‐hydroxyhexoxy)biphenyl, and the effect of the structures of the d...
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| Veröffentlicht in: | Polymer engineering and science 2007-04, Vol.47 (4), p.439-446 |
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| creator | Lee, Mooyoung Hong, Sung Chul Lee, Sang-Won |
| description | Thermotropic liquid crystalline polyurethanes (LCPUs) were synthesized through the polyaddition reaction of 2,4‐toluene diisocyanate (2,4‐TDI), 4,4′‐diphenylmethane diisocyanate (MDI), or o‐toluidine diisocyanate (ODI) with 4,4′‐bis(6‐hydroxyhexoxy)biphenyl, and the effect of the structures of the diisocyanates on the properties of LCPUs were investigated. Intrinsic viscosities of the polymers were in the range of 0.23–0.30 dL/g. Mesomorphic behavior of the polyurethanes were investigated by differential scanning calorimetry, polarized optical microscopy, and wide‐angle X‐ray scattering. Different mesomorphic behaviors were observed according to the different structural characteristics of diisocyanates. Polyurethanes employing 2,4‐TDI and MDI exhibited monotropic behaviors, while that with ODI showed enantiotropic behavior. POLYM. ENG. SCI., 47:439–446, 2007. © 2007 Society of Plastics Engineers. |
| doi_str_mv | 10.1002/pen.20684 |
| format | Article |
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Intrinsic viscosities of the polymers were in the range of 0.23–0.30 dL/g. Mesomorphic behavior of the polyurethanes were investigated by differential scanning calorimetry, polarized optical microscopy, and wide‐angle X‐ray scattering. Different mesomorphic behaviors were observed according to the different structural characteristics of diisocyanates. Polyurethanes employing 2,4‐TDI and MDI exhibited monotropic behaviors, while that with ODI showed enantiotropic behavior. POLYM. ENG. SCI., 47:439–446, 2007. © 2007 Society of Plastics Engineers.</description><identifier>ISSN: 0032-3888</identifier><identifier>EISSN: 1548-2634</identifier><identifier>DOI: 10.1002/pen.20684</identifier><identifier>CODEN: PYESAZ</identifier><language>eng</language><publisher>Hoboken: Wiley Subscription Services, Inc., A Wiley Company</publisher><subject>Applied sciences ; Chemical reactions ; Chemical synthesis ; Crystallization ; Exact sciences and technology ; Isocyanates ; Organic polymers ; Physicochemistry of polymers ; Polymers with particular structures ; Polyurethane ; Polyurethanes ; Preparation, kinetics, thermodynamics, mechanism and catalysts ; Properties</subject><ispartof>Polymer engineering and science, 2007-04, Vol.47 (4), p.439-446</ispartof><rights>Copyright © 2007 Society of Plastics Engineers</rights><rights>2008 INIST-CNRS</rights><rights>COPYRIGHT 2007 Society of Plastics Engineers, Inc.</rights><rights>Copyright Society of Plastics Engineers Apr 2007</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c5724-938b0b25db7d5cd93f8a4346560d771daadac1b8a350f53f2da84430743afcd83</citedby><cites>FETCH-LOGICAL-c5724-938b0b25db7d5cd93f8a4346560d771daadac1b8a350f53f2da84430743afcd83</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%2Fpen.20684$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1002%2Fpen.20684$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,776,780,1411,27903,27904,45553,45554</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=18652222$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Lee, Mooyoung</creatorcontrib><creatorcontrib>Hong, Sung Chul</creatorcontrib><creatorcontrib>Lee, Sang-Won</creatorcontrib><title>Effect of diisocyanate structures on the properties of liquid crystalline polyurethanes</title><title>Polymer engineering and science</title><addtitle>Polym Eng Sci</addtitle><description>Thermotropic liquid crystalline polyurethanes (LCPUs) were synthesized through the polyaddition reaction of 2,4‐toluene diisocyanate (2,4‐TDI), 4,4′‐diphenylmethane diisocyanate (MDI), or o‐toluidine diisocyanate (ODI) with 4,4′‐bis(6‐hydroxyhexoxy)biphenyl, and the effect of the structures of the diisocyanates on the properties of LCPUs were investigated. Intrinsic viscosities of the polymers were in the range of 0.23–0.30 dL/g. Mesomorphic behavior of the polyurethanes were investigated by differential scanning calorimetry, polarized optical microscopy, and wide‐angle X‐ray scattering. Different mesomorphic behaviors were observed according to the different structural characteristics of diisocyanates. Polyurethanes employing 2,4‐TDI and MDI exhibited monotropic behaviors, while that with ODI showed enantiotropic behavior. POLYM. ENG. SCI., 47:439–446, 2007. © 2007 Society of Plastics Engineers.</description><subject>Applied sciences</subject><subject>Chemical reactions</subject><subject>Chemical synthesis</subject><subject>Crystallization</subject><subject>Exact sciences and technology</subject><subject>Isocyanates</subject><subject>Organic polymers</subject><subject>Physicochemistry of polymers</subject><subject>Polymers with particular structures</subject><subject>Polyurethane</subject><subject>Polyurethanes</subject><subject>Preparation, kinetics, thermodynamics, mechanism and catalysts</subject><subject>Properties</subject><issn>0032-3888</issn><issn>1548-2634</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2007</creationdate><recordtype>article</recordtype><sourceid>8G5</sourceid><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><sourceid>GUQSH</sourceid><sourceid>M2O</sourceid><recordid>eNp1kV1rFDEYhQdRcK1e-A8GQcGL2eZzJnNZ27UWapW20svwbj62qbPJNsmg8-9N3VVR1uQi8PKck5OcqnqJ0RwjRA43xs8JagV7VM0wZ6IhLWWPqxlClDRUCPG0epbSHSos5f2sullYa1Sug621cymoCTxkU6ccR5XHaFIdfJ1vTb2JYWNidg8TWw_ufnS6VnFKGYbB-QKEYSqCfAvepOfVEwtDMi9250H15f3i-vhDc_7p9Oz46LxRvCOs6alYoiXhetlprnRPrQBGWctbpLsOawANCi8FUI4sp5ZoEIxR1DEKVmlBD6o3W98S7340Kcu1S8oMQwkRxiRJ35d7BCvgq3_AuzBGX7JJgkVLGMK0QM0WWsFgpPM25AhqZbyJMARvrCvjI9xiwVpK28LP9_Bla7N2aq_g7V-CwmTzPa9gTEmeXV3uZVUMKUVj5Sa6NcRJYiQfypalbPmz7MK-3r0OkoLBRvDKpT8C0XJSVuEOt9y3Emz6v6H8vLj45bz7EpdK0t8KiF9l29GOy5uLU9l9vO7w1eU7eUJ_AOBqxng</recordid><startdate>200704</startdate><enddate>200704</enddate><creator>Lee, Mooyoung</creator><creator>Hong, Sung Chul</creator><creator>Lee, Sang-Won</creator><general>Wiley Subscription Services, Inc., A Wiley Company</general><general>Wiley Subscription Services</general><general>Society of Plastics Engineers, Inc</general><general>Blackwell Publishing Ltd</general><scope>BSCLL</scope><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>ISR</scope><scope>3V.</scope><scope>7SR</scope><scope>7XB</scope><scope>88I</scope><scope>8AF</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>8FK</scope><scope>8G5</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>ARAPS</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>GNUQQ</scope><scope>GUQSH</scope><scope>HCIFZ</scope><scope>JG9</scope><scope>KB.</scope><scope>L6V</scope><scope>M2O</scope><scope>M2P</scope><scope>M7S</scope><scope>MBDVC</scope><scope>P5Z</scope><scope>P62</scope><scope>PDBOC</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>PTHSS</scope><scope>Q9U</scope><scope>S0X</scope></search><sort><creationdate>200704</creationdate><title>Effect of diisocyanate structures on the properties of liquid crystalline polyurethanes</title><author>Lee, Mooyoung ; 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| identifier | ISSN: 0032-3888 |
| ispartof | Polymer engineering and science, 2007-04, Vol.47 (4), p.439-446 |
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| source | Wiley Online Library Journals Frontfile Complete |
| subjects | Applied sciences Chemical reactions Chemical synthesis Crystallization Exact sciences and technology Isocyanates Organic polymers Physicochemistry of polymers Polymers with particular structures Polyurethane Polyurethanes Preparation, kinetics, thermodynamics, mechanism and catalysts Properties |
| title | Effect of diisocyanate structures on the properties of liquid crystalline polyurethanes |
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