Evaluation of instantaneous and cumulative models for reactivity ratio estimation with multiresponse scenarios

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dc.contributor.authorZhou, Xiaoqinen
dc.date.accessioned2006-08-22T13:56:53Z
dc.date.available2006-08-22T13:56:53Z
dc.date.issued2004en
dc.date.submitted2004en
dc.description.abstractEstimating reactivity ratios in multicomponent polymerizations is becoming increasingly important. At the same time, using cumulative models is becoming imperative, as some multicomponent systems are inherently so fast that instantaneous "approximate" models can not be used. In the first part of the thesis, triad fractions (sequence length characteristics) are employed in a multiresponse scenario, investigating different error structures and levels. A comparison is given between instantaneous triad fraction models and instantaneous composition model, which represent the current state-of-the-art. In the second part of the thesis, extensions are discussed with cumulative composition and triad fraction models over the whole conversion range, thus relating the problem of reactivity ratio estimation to the optimal design of experiments (i. e. optimal sampling) over polymerization time and conversion. The performance of cumulative multiresponse models is superior to that of their instantaneous counterparts, which can be explained from an information content point of view. As a side-project, the existence of azeotropic points is investigated in terpolymer (Alfrey-Goldfinger equation) and tetrapolymer (Walling-Briggs equation) systems.en
dc.formatapplication/pdfen
dc.format.extent2480481 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/10012/959
dc.language.isoenen
dc.pendingfalseen
dc.publisherUniversity of Waterlooen
dc.rightsCopyright: 2004, Zhou, Xiaoqin. All rights reserved.en
dc.subjectChemical Engineeringen
dc.subjectreactivity ratioen
dc.subjectexperimental designen
dc.subjectmultiresponseen
dc.subjectcumulative modelen
dc.subjectazeotropic pointen
dc.subjectterpolymeren
dc.subjectcopolymeren
dc.subjectmulticomponent polymeren
dc.subjecterror structureen
dc.titleEvaluation of instantaneous and cumulative models for reactivity ratio estimation with multiresponse scenariosen
dc.typeMaster Thesisen
uws-etd.degreeMaster of Engineeringen
uws-etd.degree.departmentChemical Engineeringen
uws.peerReviewStatusUnrevieweden
uws.scholarLevelGraduateen
uws.typeOfResourceTexten

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