Novel atropisomeric binaphthol containing comb-shaped copolymers forming chiral nematic phases
Novel comb‐shaped liquid crystalline acrylic copolymers consisting of nematogenic methoxy‐phenylbenzoate acrylic monomers (A) together with novel chiral binaphthol (BN) methacrylic monomers (MB‐m) were synthesized in this study. The prepared copolymers differ in spacer lengths of MB‐m (m = 3, 5, 11)...
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| Veröffentlicht in: | Polymer engineering and science 1997-06, Vol.37 (6), p.945-951 |
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| container_title | Polymer engineering and science |
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| creator | Shibaev, V. P. Deussen, H. J. Bobrovsky, A. Yu Shibaev, P. V. Boiko, N. I. Bjørnholm, T. Schaumburg, K. Bechgaard, K. |
| description | Novel comb‐shaped liquid crystalline acrylic copolymers consisting of nematogenic methoxy‐phenylbenzoate acrylic monomers (A) together with novel chiral binaphthol (BN) methacrylic monomers (MB‐m) were synthesized in this study. The prepared copolymers differ in spacer lengths of MB‐m (m = 3, 5, 11) and in their compositions. The homopolymers of the three new chiral BN monomers MB‐m were also prepared. Copolymers with a low concentration of BN monomeric units (less than 16 mol %) display a cholesteric mesophase. The induced chirality in the polymers is due to atropisomerism (chirality due to hindered rotation around single bonds) of the BN molecules. The helical twisting power β (HTP) caused by the atropisomeric units in the synthesized copolymers was shown to decrease significantly on heating. The unusually high negative temperature coefficient of HTP observed above the glass transition temperature (Tg) could be explained in terms of conformational changes of the BN molecules in the copolymers. |
| doi_str_mv | 10.1002/pen.11738 |
| format | Article |
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P. ; Deussen, H. J. ; Bobrovsky, A. Yu ; Shibaev, P. V. ; Boiko, N. I. ; Bjørnholm, T. ; Schaumburg, K. ; Bechgaard, K.</creator><creatorcontrib>Shibaev, V. P. ; Deussen, H. J. ; Bobrovsky, A. Yu ; Shibaev, P. V. ; Boiko, N. I. ; Bjørnholm, T. ; Schaumburg, K. ; Bechgaard, K.</creatorcontrib><description>Novel comb‐shaped liquid crystalline acrylic copolymers consisting of nematogenic methoxy‐phenylbenzoate acrylic monomers (A) together with novel chiral binaphthol (BN) methacrylic monomers (MB‐m) were synthesized in this study. The prepared copolymers differ in spacer lengths of MB‐m (m = 3, 5, 11) and in their compositions. The homopolymers of the three new chiral BN monomers MB‐m were also prepared. Copolymers with a low concentration of BN monomeric units (less than 16 mol %) display a cholesteric mesophase. The induced chirality in the polymers is due to atropisomerism (chirality due to hindered rotation around single bonds) of the BN molecules. The helical twisting power β (HTP) caused by the atropisomeric units in the synthesized copolymers was shown to decrease significantly on heating. The unusually high negative temperature coefficient of HTP observed above the glass transition temperature (Tg) could be explained in terms of conformational changes of the BN molecules in the copolymers.</description><identifier>ISSN: 0032-3888</identifier><identifier>EISSN: 1548-2634</identifier><identifier>DOI: 10.1002/pen.11738</identifier><identifier>CODEN: PYESAZ</identifier><language>eng</language><publisher>Hoboken: Wiley Subscription Services, Inc., A Wiley Company</publisher><subject>Acrylic resins ; Graft copolymers ; Monomers ; Naphtha ; Polymer liquid crystals</subject><ispartof>Polymer engineering and science, 1997-06, Vol.37 (6), p.945-951</ispartof><rights>Copyright © 1997 Society of Plastics Engineers</rights><rights>1997 INIST-CNRS</rights><rights>COPYRIGHT 1997 Society of Plastics Engineers, Inc.</rights><rights>Copyright Society of Plastics Engineers Jun 1997</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c4698-f2bf8902287e93a8e9670d5c2c070906cbf6fdaae201d57d42db27252aa863af3</citedby><cites>FETCH-LOGICAL-c4698-f2bf8902287e93a8e9670d5c2c070906cbf6fdaae201d57d42db27252aa863af3</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.11738$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1002%2Fpen.11738$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>309,310,314,780,784,789,790,1417,23930,23931,25140,27924,27925,45574,45575</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=2718241$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Shibaev, V. P.</creatorcontrib><creatorcontrib>Deussen, H. J.</creatorcontrib><creatorcontrib>Bobrovsky, A. Yu</creatorcontrib><creatorcontrib>Shibaev, P. V.</creatorcontrib><creatorcontrib>Boiko, N. I.</creatorcontrib><creatorcontrib>Bjørnholm, T.</creatorcontrib><creatorcontrib>Schaumburg, K.</creatorcontrib><creatorcontrib>Bechgaard, K.</creatorcontrib><title>Novel atropisomeric binaphthol containing comb-shaped copolymers forming chiral nematic phases</title><title>Polymer engineering and science</title><addtitle>Polym Eng Sci</addtitle><description>Novel comb‐shaped liquid crystalline acrylic copolymers consisting of nematogenic methoxy‐phenylbenzoate acrylic monomers (A) together with novel chiral binaphthol (BN) methacrylic monomers (MB‐m) were synthesized in this study. The prepared copolymers differ in spacer lengths of MB‐m (m = 3, 5, 11) and in their compositions. The homopolymers of the three new chiral BN monomers MB‐m were also prepared. Copolymers with a low concentration of BN monomeric units (less than 16 mol %) display a cholesteric mesophase. The induced chirality in the polymers is due to atropisomerism (chirality due to hindered rotation around single bonds) of the BN molecules. The helical twisting power β (HTP) caused by the atropisomeric units in the synthesized copolymers was shown to decrease significantly on heating. The unusually high negative temperature coefficient of HTP observed above the glass transition temperature (Tg) could be explained in terms of conformational changes of the BN molecules in the copolymers.</description><subject>Acrylic resins</subject><subject>Graft copolymers</subject><subject>Monomers</subject><subject>Naphtha</subject><subject>Polymer liquid crystals</subject><issn>0032-3888</issn><issn>1548-2634</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1997</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>eNp1kV9rFDEUxYMouFYf_AaD-KDgtPkzk2Qey9KuhbJKrfhmuJNJdlJnkjGZVffbm3bXQqGSh1yS3z05Nweh1wQfE4zpyWT8MSGCySdoQepKlpSz6ilaYMxoyaSUz9GLlG5wZlndLND3dfhlhgLmGCaXwmii00XrPEz93Ieh0MHP4Lzzm1yObZl6mEyX6ykMu0ynwoY43l33LsJQeDPCnDWmHpJJL9EzC0Myrw77Efp6fna9_FheflpdLE8vS13xRpaWtlY2mFIpTMNAmoYL3NWaaixwg7luLbcdgKGYdLXoKtq1VNCaAkjOwLIj9GavO8Xwc2vSrG7CNvr8pKJEckxrLDP0YQ9tYDDKeRvmCHpjvMnGgzfW5eNT0jRcSkozXj6C59WZ0enH-HcP-NuvM3_mDWxTUhdfrh6g7_eojiGlaKyaohsh7hTB6jZHlXNUdzlm9u1hNEgaBhvBa5fuG6ggklYkYyd77Hd2tfu_nvp8tv4nfJjPpezzvgPiD8UFE7X6tl4pTtj56np5pVbsL7ubuss</recordid><startdate>199706</startdate><enddate>199706</enddate><creator>Shibaev, V. 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P. ; Deussen, H. J. ; Bobrovsky, A. Yu ; Shibaev, P. V. ; Boiko, N. I. ; Bjørnholm, T. ; Schaumburg, K. ; Bechgaard, K.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c4698-f2bf8902287e93a8e9670d5c2c070906cbf6fdaae201d57d42db27252aa863af3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1997</creationdate><topic>Acrylic resins</topic><topic>Graft copolymers</topic><topic>Monomers</topic><topic>Naphtha</topic><topic>Polymer liquid crystals</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Shibaev, V. P.</creatorcontrib><creatorcontrib>Deussen, H. J.</creatorcontrib><creatorcontrib>Bobrovsky, A. Yu</creatorcontrib><creatorcontrib>Shibaev, P. V.</creatorcontrib><creatorcontrib>Boiko, N. I.</creatorcontrib><creatorcontrib>Bjørnholm, T.</creatorcontrib><creatorcontrib>Schaumburg, K.</creatorcontrib><creatorcontrib>Bechgaard, K.</creatorcontrib><collection>Istex</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Gale In Context: Science</collection><collection>ProQuest Central (Corporate)</collection><collection>Engineered Materials Abstracts</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>Science Database (Alumni Edition)</collection><collection>STEM Database</collection><collection>Technology Research Database</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>ProQuest Central (Alumni) (purchase pre-March 2016)</collection><collection>Research Library (Alumni Edition)</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>Advanced Technologies & Aerospace Collection</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Materials Science Collection</collection><collection>ProQuest Central Korea</collection><collection>ProQuest Central Student</collection><collection>Research Library Prep</collection><collection>SciTech Premium Collection</collection><collection>Materials Research Database</collection><collection>Materials Science Database</collection><collection>ProQuest Engineering Collection</collection><collection>Research Library</collection><collection>Science Database</collection><collection>Engineering Database</collection><collection>Research Library (Corporate)</collection><collection>Advanced Technologies & Aerospace Database</collection><collection>ProQuest Advanced Technologies & Aerospace Collection</collection><collection>Materials Science Collection</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>Engineering Collection</collection><collection>ProQuest Central Basic</collection><collection>SIRS Editorial</collection><jtitle>Polymer engineering and science</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Shibaev, V. P.</au><au>Deussen, H. J.</au><au>Bobrovsky, A. Yu</au><au>Shibaev, P. V.</au><au>Boiko, N. I.</au><au>Bjørnholm, T.</au><au>Schaumburg, K.</au><au>Bechgaard, K.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Novel atropisomeric binaphthol containing comb-shaped copolymers forming chiral nematic phases</atitle><jtitle>Polymer engineering and science</jtitle><addtitle>Polym Eng Sci</addtitle><date>1997-06</date><risdate>1997</risdate><volume>37</volume><issue>6</issue><spage>945</spage><epage>951</epage><pages>945-951</pages><issn>0032-3888</issn><eissn>1548-2634</eissn><coden>PYESAZ</coden><abstract>Novel comb‐shaped liquid crystalline acrylic copolymers consisting of nematogenic methoxy‐phenylbenzoate acrylic monomers (A) together with novel chiral binaphthol (BN) methacrylic monomers (MB‐m) were synthesized in this study. The prepared copolymers differ in spacer lengths of MB‐m (m = 3, 5, 11) and in their compositions. The homopolymers of the three new chiral BN monomers MB‐m were also prepared. Copolymers with a low concentration of BN monomeric units (less than 16 mol %) display a cholesteric mesophase. The induced chirality in the polymers is due to atropisomerism (chirality due to hindered rotation around single bonds) of the BN molecules. The helical twisting power β (HTP) caused by the atropisomeric units in the synthesized copolymers was shown to decrease significantly on heating. The unusually high negative temperature coefficient of HTP observed above the glass transition temperature (Tg) could be explained in terms of conformational changes of the BN molecules in the copolymers.</abstract><cop>Hoboken</cop><pub>Wiley Subscription Services, Inc., A Wiley Company</pub><doi>10.1002/pen.11738</doi><tpages>7</tpages></addata></record> |
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| ispartof | Polymer engineering and science, 1997-06, Vol.37 (6), p.945-951 |
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| language | eng |
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| subjects | Acrylic resins Graft copolymers Monomers Naphtha Polymer liquid crystals |
| title | Novel atropisomeric binaphthol containing comb-shaped copolymers forming chiral nematic phases |
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