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dc.contributor.author Guapacha Martínez, Jorge Ariel
dc.contributor.author Failla, Marcelo Daniel
dc.contributor.author Valles, Enrique Marcelo
dc.contributor.author Quinzani, Lidia Maria
dc.date.available 2017-03-03T20:25:44Z
dc.date.issued 2014-01
dc.identifier.citation Guapacha Martínez, Jorge Ariel; Failla, Marcelo Daniel; Valles, Enrique Marcelo; Quinzani, Lidia Maria; Molecular, rheological, and thermal study of long-chain branched polypropylene obtained by esterification of anhydride grafted polypropylene; Wiley; Journal Of Applied Polymer Science; 131; 12; 1-2014; 1-2
dc.identifier.issn 0021-8995
dc.identifier.uri http://hdl.handle.net/11336/13517
dc.description.abstract Long-chain branched polypropylene was prepared using reaction in the molten state in the presence of glycerol and a linear polypropylene functionalized with maleic anhydride (PPg). The concentration of glycerol in the melt was varied in the range from 0.1 to 5 wt % to obtain different levels of branching. FTIR spectroscopy results indicate that the OH groups of glycerol react with the anhydrides on the PPg chains giving place to ester groups. The presence of long-chain branches in the molecular structure of PPg was confirmed using multiple-detection size-exclusion chromatography and rheology. These techniques demonstrate that the level of branching increases with glycerol concentration and that the modification of PPg produces materials with a bimodal distribution of polymer species. Moreover, some of the highly modified materials display gel-like behavior. The materials also display thermo-rheological complexity and enhanced activation energy at low frequencies. The crystallization study shows that both the anhydride groups in PPg and the LCBs have opposite nucleating effects. PPg presents the largest activation energy of crystallization and its value decreases with the concentration of glycerol for a given level of crystallization.
dc.format application/pdf
dc.language.iso eng
dc.publisher Wiley
dc.rights info:eu-repo/semantics/restrictedAccess
dc.rights.uri https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject polyolefins
dc.subject structure-propery relations
dc.subject crosslinking
dc.subject.classification Ingeniería de los Materiales
dc.subject.classification Ingeniería de los Materiales
dc.subject.classification INGENIERÍAS Y TECNOLOGÍAS
dc.title Molecular, rheological, and thermal study of long-chain branched polypropylene obtained by esterification of anhydride grafted polypropylene
dc.type info:eu-repo/semantics/article
dc.type info:ar-repo/semantics/artículo
dc.type info:eu-repo/semantics/publishedVersion
dc.date.updated 2017-03-03T19:00:39Z
dc.identifier.eissn 1097-4628
dc.journal.volume 131
dc.journal.number 12
dc.journal.pagination 1-2
dc.journal.pais Estados Unidos
dc.journal.ciudad Hoboken
dc.description.fil Fil: Guapacha Martínez, Jorge Ariel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Bahía Blanca. Planta Piloto de Ingeniería Química (i); Argentina
dc.description.fil Fil: Failla, Marcelo Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Bahía Blanca. Planta Piloto de Ingeniería Química (i); Argentina. Universidad Nacional del Sur. Departamento de Ingeniería; Argentina
dc.description.fil Fil: Valles, Enrique Marcelo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Bahía Blanca. Planta Piloto de Ingeniería Química (i); Argentina
dc.description.fil Fil: Quinzani, Lidia Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Bahía Blanca. Planta Piloto de Ingeniería Química (i); Argentina
dc.journal.title Journal Of Applied Polymer Science
dc.relation.alternativeid info:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1002/app.40357/abstract
dc.relation.alternativeid info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1002/app.40357


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info:eu-repo/semantics/restrictedAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)