Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 김병철 | - |
dc.date.accessioned | 2019-09-24T07:46:03Z | - |
dc.date.available | 2019-09-24T07:46:03Z | - |
dc.date.issued | 2019-04 | - |
dc.identifier.citation | MACROMOLECULAR RESEARCH, v. 27, NO 4, Page. 404-411 | en_US |
dc.identifier.issn | 1598-5032 | - |
dc.identifier.issn | 2092-7673 | - |
dc.identifier.uri | https://link.springer.com/article/10.1007%2Fs13233-019-7058-8 | - |
dc.identifier.uri | https://repository.hanyang.ac.kr/handle/20.500.11754/110624 | - |
dc.description.abstract | The solution of poly(2-cyano-p-phenylene terephthalamide) (CY-PPTA) in N,N-dimethyl acetamide/lithium chloride exhibited a concentration-dependent transition of liquid crystalline textures from nematic-rich to cholesteric-rich with increasing concentration above the critical concentration. The 2D correlation analysis of the FTIR spectra revealed that the dipolar interactions between cyano groups of the polymer increased as concentration increased. The polarized cyano group withdrew the delocalized -electrons in the C-N bond of the amide group of the polymer, increasing its single bond character. The molecular simulation based on this spectroscopic evidence proposed a change of molecular shapes of CY-PPTA from linear rigid rod to semi-rigid helix. The semi-rigid helical conformation where the single bond character was prevalent over the delocalized one in the C-N bond would develop a cholesteric liquid crystalline texture. | en_US |
dc.description.sponsorship | This work was supported by the Industrial Strategic Technology Development Program (10042636, Development of para-Aramid Fibers Spinnable in Organic Solvent) funded by the Ministry of Trade, Industry and Energy (MOTIE) of Korea. | en_US |
dc.language.iso | en | en_US |
dc.publisher | SPRINGER | en_US |
dc.subject | para-aramids | en_US |
dc.subject | liquid crystals | en_US |
dc.subject | cholesteric | en_US |
dc.subject | FTIR | en_US |
dc.subject | 2D correlation spectroscopy | en_US |
dc.title | Enthalpy-Driven Transition of Liquid Crystalline Textures of Poly(2-cyano-p-phenylene terephthalamide) in N,N-Dimethyl Acetamide/Lithium Chloride | en_US |
dc.type | Article | en_US |
dc.relation.no | 4 | - |
dc.relation.volume | 27 | - |
dc.identifier.doi | 10.1007/s13233-019-7058-8 | - |
dc.relation.page | 404-411 | - |
dc.relation.journal | MACROMOLECULAR RESEARCH | - |
dc.contributor.googleauthor | Jung, Dae Eon | - |
dc.contributor.googleauthor | Eom, Youngho | - |
dc.contributor.googleauthor | Kim, Byoung Chul | - |
dc.relation.code | 2019003728 | - |
dc.sector.campus | S | - |
dc.sector.daehak | COLLEGE OF ENGINEERING[S] | - |
dc.sector.department | DEPARTMENT OF ORGANIC AND NANO ENGINEERING | - |
dc.identifier.pid | bckim | - |
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