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dc.contributor.advisorKalay, Gürhan
dc.contributor.authorErdem, Hacı Bayram
dc.date.accessioned2016-07-01T10:55:28Z
dc.date.available2016-07-01T10:55:28Z
dc.date.issued2002
dc.identifier.urihttp://hdl.handle.net/11693/29194
dc.descriptionCataloged from PDF version of article.en_US
dc.description.abstractThe crystallization behaviour of different commercial grades of isotactic polybutene-1 was investigated and an experimental set-up was designed for this research study. The experimental set-up constructed provides both fast-cooling of the sample and the recording of the growth of spherulites as a real time movie. The radial growth rate of the spherulites were observed to be higher for the grades with higher molecular weights. The results were found to fit to the Lauritzenn-Hoffman crystallization theory, and this theory is used to calculate the lateral surface free energy, σ, and fold surface free energy, σe. The lateral surface free energy was found to be 10.4 erg/cm2 for all the grades investigated. The fold surface free energy calculated to be between 15.5 to 17.4 erg/cm2 . The fold surface free energies and the crystallization rates do not exhibit any dependence on the molecular weight of the polymer. The polymer containing nucleating agents has the highest crystallization rate. It was observed that the likelihood of deviation from spherical shape is greater for the grades with lower molecular weights.en_US
dc.description.statementofresponsibilityErdem, Hacı Bayramen_US
dc.format.extentxiii, 75 leaves, illustrations, 30 cmen_US
dc.language.isoEnglishen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectpolybutene-1en_US
dc.subjectLauritzen-Hoffman theoryen_US
dc.subjectspherulite growth rateen_US
dc.subjectnucleating agenten_US
dc.subjectcrystallization rateen_US
dc.subjectpolymer crystallizationen_US
dc.subject.lccQD382.C78 E73 2002en_US
dc.subject.lcshCrystalline polymers.en_US
dc.titleThe crystallization behaviour of isotactic polybutene-1en_US
dc.typeThesisen_US
dc.departmentDepartment of Chemistryen_US
dc.publisherBilkent Universityen_US
dc.description.degreeM.S.en_US
dc.identifier.itemidBILKUTUPB068048


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