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|Type:||Artigo de evento|
|Title:||Empirie Models Development For Correlation Between Intrinsic And Final Properties Of Lmdpe And Hdpe|
Maciel Filho R.
|Abstract:||The polymer final properties determine in which application area it will be used. Moreover, with the enormous competition of polyolefins market, the knowledge about those properties becomes very important for the industry. A great challenge related to polymers research has been the development of relations enabling prediction of polymer final properties according to the initial operational conditions - either during the polymerization process or the transformation process phases. These relations can be utilized to produce final devices with specified properties. This paper aims to built-up empiric models relating polymers fundamental and final properties. The development was carried out through resin characterizations and variables determination used to built-up empirical models. The independent variables used in the models were fluidity index (FI, which is directly related to resin viscosity and opposite to molecular weight), stress exponent (SEX, which is a direct function of the molecular weight distribution), and density. Polyethylene resins produced in a second-generation petrochemical industry were used as a case study, since it is an important commodity nowadays. These results were obtained for the plastic molding by drawing-blow, rotomolding and monofilament. It is possible to conclude that the empirical models developed may be useful to be used in either product development or for the definition of operation strategy to obtain the product with the desired property.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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