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https://doi.org/10.1002/1521-3935(20020101)203:1<122
DC Field | Value | |
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dc.title | Investigation of the effect of an ether moiety on the liquid crystallinity by thin film polymerization | |
dc.contributor.author | Cheng, S.-X. | |
dc.contributor.author | Chung, T.-S. | |
dc.date.accessioned | 2014-06-17T08:32:45Z | |
dc.date.available | 2014-06-17T08:32:45Z | |
dc.date.issued | 2002-01-09 | |
dc.identifier.citation | Cheng, S.-X.,Chung, T.-S. (2002-01-09). Investigation of the effect of an ether moiety on the liquid crystallinity by thin film polymerization. Macromolecular Chemistry and Physics 203 (1) : 122-128. ScholarBank@NUS Repository. <a href="https://doi.org/10.1002/1521-3935(20020101)203:1<122" target="_blank">https://doi.org/10.1002/1521-3935(20020101)203:1<122</a> | |
dc.identifier.issn | 10221352 | |
dc.identifier.uri | http://scholarbank.nus.edu.sg/handle/10635/66642 | |
dc.description.abstract | The effect of an ether moiety on liquid crystallinity was determined by means of in situ thin film polymerization under a polarizing microscope with a heating stage. The polymerization system consists of p-acetoxybenzoic acid (ABA)/acetoxyacetanilide (AAA)/4,4′-oxybis(benzoic acid) (OBA). Because of the swivel structure introduced by the ether group in the OBA monomeric unit, there is a critical composition to form the mesogenic phase during the polymerization. Liquid crystallinity forms when the concentration of the OBA is lower than 25 mol-%. Surprisingly, both LC phase and crystalline phase appear simultaneously in the isotropic phase if the reaction system is at critical composition. In addition, we have observed the disclination strengths change from ±1 to ±1/2 with an increase in ether linkages in the polymerization systems where LC phases appear, which is quite different from the homopolymerization system containing rigid rod-like p-acetoxybenzoic acid (ABA) and other systems without ether linkages where their disclinations have strengths of ±1. Clearly, the chain structure not only determines the formation of liquid crystallinity but also affects the strength of disclinations and the annihilation process. | |
dc.description.uri | http://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1002/1521-3935(20020101)203:1<122 | |
dc.source | Scopus | |
dc.subject | Liquid crystallinity | |
dc.subject | Liquid-crystalline polymers (LCP) | |
dc.subject | Polymerization | |
dc.subject | Thin films | |
dc.type | Article | |
dc.contributor.department | CHEMICAL & ENVIRONMENTAL ENGINEERING | |
dc.description.doi | 10.1002/1521-3935(20020101)203:1<122 | |
dc.description.sourcetitle | Macromolecular Chemistry and Physics | |
dc.description.volume | 203 | |
dc.description.issue | 1 | |
dc.description.page | 122-128 | |
dc.description.coden | MCHPE | |
dc.identifier.isiut | NOT_IN_WOS | |
Appears in Collections: | Staff Publications |
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