Morphological raman analysis of short chain branched ethylene and propylene metallocenic copolymers
Author
dc.contributor.author
Satti, A. J.
Author
dc.contributor.author
Quijada, R.
Author
dc.contributor.author
Pastor, J. M.
Author
dc.contributor.author
Valles, E. M.
Admission date
dc.date.accessioned
2018-09-25T19:30:32Z
Available date
dc.date.available
2018-09-25T19:30:32Z
Publication date
dc.date.issued
2018-05
Cita de ítem
dc.identifier.citation
Polymer Testing 67 (2018) 450–456
es_ES
Identifier
dc.identifier.other
10.1016/j.polymertesting.2018.03.036
Identifier
dc.identifier.uri
https://repositorio.uchile.cl/handle/2250/151749
Abstract
dc.description.abstract
Spectroscopic features in the Raman spectra of semicrystalline polyolefins that characterize different phase morphologies are reported. With growing incorporation of different 1-olefins, changes in the spectra due to different short chain branches are identified for polyethylene and polypropylene, both isotactic and syndiotactic. Bands were assigned to crystalline, semicrystalline and amorphous contents, and quantification was approached with the use of internal reference bands. The degree of crystallinity and the conformational order of the copolymers decrease with the increase in short chain branches content, and the behavior of larger short chains is different depending on the type of polymer analyzed. A semi ordered interphase was found, assigned and followed in all cases, as well as the evolution of amorphous phase with comonomer incorporation.
es_ES
Patrocinador
dc.description.sponsorship
Universidad Nacional del Sur
PGI UNS 24
CONICET (Argentina)
PIP 5836
Universidad de Chile
Universidad de Valladolid (Spain)
CYTED VIII. 11
unesco 331210