学位论文详细信息
Evaluation of instantaneous and cumulative models for reactivity ratio estimation with multiresponse scenarios
Chemical Engineering;reactivity ratio;experimental design;multiresponse;cumulative model;azeotropic point;terpolymer;copolymer;multicomponent polymer;error structure
Zhou, Xiaoqin
University of Waterloo
关键词: Chemical Engineering;    reactivity ratio;    experimental design;    multiresponse;    cumulative model;    azeotropic point;    terpolymer;    copolymer;    multicomponent polymer;    error structure;   
Others  :  https://uwspace.uwaterloo.ca/bitstream/10012/959/1/x5zhou2004.pdf
瑞士|英语
来源: UWSPACE Waterloo Institutional Repository
PDF
【 摘 要 】

Estimating 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, whichrepresent 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.

【 预 览 】
附件列表
Files Size Format View
Evaluation of instantaneous and cumulative models for reactivity ratio estimation with multiresponse scenarios 2422KB PDF download
  文献评价指标  
  下载次数:12次 浏览次数:17次