Rheology of Long-Chain Branched Polypropylene Copolymers
| Autor: | Elisa Passaglia, Fabio Zulli, Marco Giordano, Sylvain Augier, Laura Andreozzi |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
Chemical substance
Materials science Polymers and Plastics Thermodynamics Branching (polymer chemistry) Viscoelasticity chemistry.chemical_compound Rheology Materials Chemistry Copolymer shear thinning Composite material rheology polypropylene long-chain branching viscosity shear-thinning functionalization chemistry.chemical_classification Polypropylene Shear thinning General Chemistry Polymer Surfaces Coatings and Films long chain branching chemistry |
| Zdroj: | Journal of applied polymer science 127 (2013): 1423–1432. doi:10.1002/app.38076 info:cnr-pdr/source/autori:Zulli, Fabio; Andreozzi, Laura; Passaglia, Elisa; Augier, Sylvain; Giordano, Marco/titolo:Rheology of Long-Chain Branched Polypropylene Copolymers/doi:10.1002%2Fapp.38076/rivista:Journal of applied polymer science (Print)/anno:2013/pagina_da:1423/pagina_a:1432/intervallo_pagine:1423–1432/volume:127 |
| DOI: | 10.1002/app.38076 |
| Popis: | In this work, we provide more insight into the rheological properties of functionalized polypropylene copolymers with modified architectures, which originate long-chain branching. The evaluation of the average distance between branches and the frac- tion of long-chain branch points has been carried out quantitatively, by numerical fitting of experimental data according to a litera- ture model, and the viscoelastic response of the samples has been analyzed in terms of a Carreau-Yasuda-like model and Cole-Cole plots. These analyses allowed us to discriminate the viscoelastic behavior of the samples on the basis of their feed composition. More- over, we were able to highlight direct correlations between viscosity, long-chain branching level, distance between branching points and functionalization degrees of PP polymers. V C 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 127: 1423-1432, 2013 |
| Databáze: | OpenAIRE |
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