{"@context":{"@vocab":"https://cir.nii.ac.jp/schema/1.0/","rdfs":"http://www.w3.org/2000/01/rdf-schema#","dc":"http://purl.org/dc/elements/1.1/","dcterms":"http://purl.org/dc/terms/","foaf":"http://xmlns.com/foaf/0.1/","prism":"http://prismstandard.org/namespaces/basic/2.0/","cinii":"http://ci.nii.ac.jp/ns/1.0/","datacite":"https://schema.datacite.org/meta/kernel-4/","ndl":"http://ndl.go.jp/dcndl/terms/","jpcoar":"https://github.com/JPCOAR/schema/blob/master/2.0/"},"@id":"https://cir.nii.ac.jp/crid/1390282681264447232.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1295/polymj.26.1387"}},{"identifier":{"@type":"COI","@value":"1:CAS:528:DyaK2MXislemur4%3D"}},{"identifier":{"@type":"NAID","@value":"130004768398"}}],"dc:title":[{"@language":"en","@value":"Second and Third Virial Coefficients for Polyisobutylene in Heptane, an Intermediate Solvent."}],"dc:language":"en","description":[{"type":"abstract","notation":[{"@language":"en","@value":"Light scattering measurements have been made on nine polyisobutylene (PIB) fractions in heptane, an intermediate solvent, at 25°C to determine the second virial coefficient <I>A</I><SUB>2</SUB> and the third virial coefficient <I>A</I><SUB>3</SUB> as functions of weight-average molecular weight <I>M<SUB>w</SUB></I> ranging from 2.7×10<SUP>4</SUP> to 7.8×10<SUP>6</SUP>. For six of the fractions, <I>z</I>-average mean-square radii of gyration have also been determined. In the molecular weight range studied, <I>A</I><SUB>2</SUB> and <I>A</I><SUB>3</SUB> vary as <I>M<SUB>w</SUB></I><SUP>−0.21</SUP> and <I>M<SUB>w</SUB></I><SUP>0.58</SUP>, respectively, and the factor <I>g</I> defined by <I>A</I><SUB>3</SUB>⁄<I>A</I><SUB>2</SUB><SUP>2</SUP><I>M<SUB>w</SUB></I> is about 0.33 almost independent of molecular weight. The data of <I>g</I> and <I>Ψ</I> (the interpenetration function) as functions of the cube of the radius expansion factor α<I><SUB>S</SUB></I>, combined with previous data in cyclohexane, a good solvent, show that the two-parameter theory breaks down unless α<I><SUB>S</SUB></I><SUP>3</SUP> is larger than about 2 for <I>g</I> and about 5 for <I>Ψ</I>. It is concluded from the comparison of these <I>g</I> data with the recent theory of Norisuye <I>et al</I>. that the failure of the two-parameter theory for <I>g</I> at small α<I><SUB>S</SUB></I><SUP>3</SUP> is due primarily to the neglect of three-segment interactions and that the effect of chain stiffness on <I>g</I> in heptane is of minor importance in the <I>M<SUB>w</SUB></I> range studied. On the other hand, the stiffness effect on <I>Ψ</I> for PIB is found to be remarkable even at large α<I><SUB>S</SUB></I><SUP>3</SUP>. In fact, the different dependences of <I>Ψ</I> on α<I><SUB>S</SUB></I><SUP>3</SUP> observed for heptane and cyclohexane solutions are explained semiquantitatively by the Yamakawa theory which takes account of the stiffness effect within the binary cluster approximation."}],"abstractLicenseFlag":"disallow"}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1410282681264447232","@type":"Researcher","personIdentifier":[{"@type":"NRID","@value":"9000283199872"}],"foaf:name":[{"@language":"en","@value":"Akasaka Kazutomo"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Department of Macromolecular Science, Osaka University"}]},{"@id":"https://cir.nii.ac.jp/crid/1410282681264447233","@type":"Researcher","personIdentifier":[{"@type":"NRID","@value":"9000283199873"}],"foaf:name":[{"@language":"en","@value":"Nakamura Yo"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Department of Macromolecular Science, Osaka University"}]},{"@id":"https://cir.nii.ac.jp/crid/1410282681264447104","@type":"Researcher","personIdentifier":[{"@type":"NRID","@value":"9000283199874"}],"foaf:name":[{"@language":"en","@value":"Norisuye Takashi"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Department of Macromolecular Science, Osaka University"}]},{"@id":"https://cir.nii.ac.jp/crid/1410282681264447234","@type":"Researcher","personIdentifier":[{"@type":"NRID","@value":"9000283199875"}],"foaf:name":[{"@language":"en","@value":"Teramoto Akio"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Department of Macromolecular Science, Osaka University"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"00323896"},{"@type":"EISSN","@value":"13490540"}],"prism:publicationName":[{"@language":"en","@value":"Polymer Journal"},{"@language":"en","@value":"Polym. J."}],"dc:publisher":[{"@language":"en","@value":"The Society of Polymer Science, Japan"}],"prism:publicationDate":"1994","prism:volume":"26","prism:number":"12","prism:startingPage":"1387","prism:endingPage":"1395"},"reviewed":"false","dcterms:accessRights":"http://purl.org/coar/access_right/c_abf2","availableAt":"1994","foaf:topic":[{"@id":"https://cir.nii.ac.jp/all?q=Second%20Virial%20Coefficient","dc:title":"Second Virial Coefficient"},{"@id":"https://cir.nii.ac.jp/all?q=Third%20Virial%20Coefficient","dc:title":"Third Virial Coefficient"},{"@id":"https://cir.nii.ac.jp/all?q=Polyisobutylene","dc:title":"Polyisobutylene"},{"@id":"https://cir.nii.ac.jp/all?q=Excluded-Volume%20Effect","dc:title":"Excluded-Volume Effect"},{"@id":"https://cir.nii.ac.jp/all?q=Expansion%20Factor","dc:title":"Expansion Factor"},{"@id":"https://cir.nii.ac.jp/all?q=Three-Segment%20Interaction","dc:title":"Three-Segment Interaction"},{"@id":"https://cir.nii.ac.jp/all?q=Light%20Scattering","dc:title":"Light Scattering"}],"relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1360011143761371392","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"High polymer solutions. 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