Structure characterization of copolymers of ethylene and 1-octadecene

JOURNAL OF POLYMER SCIENCE. PART A-2, POLYMER PHYSICS;
J POLYM SCI A-2 POLYM PHYS

dc.creatorQUIJADA-ABARCA, JUAN
dc.creatorALZAMORA, LUIS
dc.creatorBARRERA-GALLAND, GRISELDA
dc.creatorBENAVENTE-GARCIA, RAUL
dc.creatorNARVAEZ-DINAMARCA, ANA
dc.creatorPEREZ, E.
dc.date2017-04-27T18:51:21Z
dc.date2022-07-07T02:21:05Z
dc.date2017-04-27T18:51:21Z
dc.date2022-07-07T02:21:05Z
dc.date2000
dc.date.accessioned2023-08-22T10:05:42Z
dc.date.available2023-08-22T10:05:42Z
dc.identifier0
dc.identifierD96I1025
dc.identifierD96I1025
dc.identifierWOS:000086983700004
dc.identifier0449-2978
dc.identifierhttps://hdl.handle.net/10533/197354
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8338608
dc.descriptionFour ethylene-1-octadecene copolymers and the corresponding polyethylene homopolymer, synthesized with a metallocene catalyst, have been analyzed by using three characterization techniques in the solid state: differential scanning calorimetry, wide-angle X-ray diffraction, and Raman spectroscopy. Very important annealing effects are observed in the copolymers with higher comonomer content while standing at room temperature, in such a way that the enthalpies of melting derived from the first and second melting are different. The X-ray diffractograms have been analyzed in terms of amorphous and crystalline components, determining both the crystallinity and the position of the different reflections. The variation of the unit cell parameters has been calculated from those reflections. No indication of a possible participation of the relatively long 1-octadecene branches in the crystallization can be deduced from the X-ray data. The degree of crystallinity has also been determined from the Raman spectra, following two procedures. The results indicate that the crystallinities deduced from the band at 1416 cm(-1) are much lower than those derived from the other two characterization techniques. On the contrary, the data from the 1060 cm(-)1 band are practically coincident with the X-ray determinations. (C) 2000 John Wiley & Sons, Inc.
dc.description0
dc.description31
dc.descriptionFONDEF
dc.description0
dc.description0
dc.descriptionFONDEF
dc.description38
dc.languageENG
dc.relationinstname: Conicyt
dc.relationreponame: Repositorio Digital RI2.0
dc.relationinstname: Conicyt
dc.relationreponame: Repositorio Digital RI2.0
dc.relationinfo:eu-repo/grantAgreement/Fondef/D96I1025
dc.relationinfo:eu-repo/semantics/dataset/hdl.handle.net/10533/93477
dc.rightsinfo:eu-repo/semantics/openAccess
dc.titleStructure characterization of copolymers of ethylene and 1-octadecene
dc.titleJOURNAL OF POLYMER SCIENCE. PART A-2, POLYMER PHYSICS
dc.titleJ POLYM SCI A-2 POLYM PHYS
dc.typeArticulo
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/publishedVersion


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