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dc.contributor.author김병철-
dc.date.accessioned2019-11-22T07:22:30Z-
dc.date.available2019-11-22T07:22:30Z-
dc.date.issued2017-04-
dc.identifier.citationPOLYMER INTERNATIONAL, v. 66, no. 7, page. 1099-1106en_US
dc.identifier.issn0959-8103-
dc.identifier.issn1097-0126-
dc.identifier.urihttps://onlinelibrary.wiley.com/doi/abs/10.1002/pi.5367-
dc.identifier.urihttps://repository.hanyang.ac.kr/handle/20.500.11754/113652-
dc.description.abstractThe physical properties and gelation behavior of polyacrylonitrile (PAN) solutions were investigated in mixed solvents of N,N-dimethylformamide (DMF) and dimethylsulfoxide (DMSO). For the individual solubility parameters, DMSO had the polar term closer to PAN than DMF. Small-angle X-ray scattering profiles and Fourier transform infrared spectra of 20 wt% PAN solutions confirmed that the internal structure and intermolecular complexes between nitrile groups were broken up by the DMSO molecules. The slope of Cole-Cole plot, a measure of the solution heterogeneity, increased with the mole fraction of DMSO (X-DMSO) via three distinct zones. The homogenization was particularly noticeable in Zone 1 (0.0 < X-DMSO < 0.4) and Zone 3 (0.7 < X-DMSO < 1.0). The Huggins constant and UV-visible absorption at 268 nm of dilute solutions decreased sharply above X-DMSO of 0.7 in Zone 3. This indicated a marked increase of PAN solubility by dissociating the intramolecular complexes between nitrile groups. In Zone 1, the storage modulus of 20 wt% PAN solutions decreased but loss modulus remained almost constant with X-DMSO at lower frequency below 1 rad s(-1), indicating the weakening of the true entanglement points of the intermolecular complexes. The mechanism indicated that the intermolecular complexes between nitrile groups were dissociated by DMSO earlier than the intramolecular ones. (c) 2017 Society of Chemical Industryen_US
dc.language.isoen_USen_US
dc.publisherWILEYen_US
dc.subjectpolyacrylonitrile solutionen_US
dc.subjecthomogenizationen_US
dc.subjectsolubility parameteren_US
dc.subjectrheologyen_US
dc.titleThe effect of dimethylsulfoxide on the dissociation process of physical complexes of polyacrylonitrile in N,N-dimethylformamideen_US
dc.typeArticleen_US
dc.relation.no7-
dc.relation.volume66-
dc.identifier.doi10.1002/pi.5367-
dc.relation.page1099-1106-
dc.relation.journalPOLYMER INTERNATIONAL-
dc.contributor.googleauthorEom, Youngho-
dc.contributor.googleauthorKim, Byoung Chul-
dc.relation.code2017002312-
dc.sector.campusS-
dc.sector.daehakCOLLEGE OF ENGINEERING[S]-
dc.sector.departmentDEPARTMENT OF ORGANIC AND NANO ENGINEERING-
dc.identifier.pidbckim-
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COLLEGE OF ENGINEERING[S](공과대학) > ORGANIC AND NANO ENGINEERING(유기나노공학과) > Articles
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