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Influence of tructure on the properties of polypropylene copolymers and termopolymers

AuthorsCaveda,Susana; Pérez, Ernesto ; Blázquez-Blázquez, Enrique; Peña, Begoña; van Grieken, Rafael; Suárez, Inmaculada; Benavente, Rosario
KeywordsIsotactic polypropylene copolymers
Mechanodynamical properties
Optical properties
Issue Date15-Jun-2017
CitationPolymer Testing 62 : 23-32 (2017)
AbstractSeveral Ziegler-Natta copolymers of iPP with ethylene or 1-butene, and terpolymers with both counits have been characterized, devoting special attention to the effect of composition and processing conditions on the crystal structure and final properties. DSC and X-ray diffraction were used to study the polymorphism of copolymers and terpolymers. Comonomer insertion interrupts the isotactic sequences, acting as a structural defect, and the formation of g form is enhanced. Moreover, crystallinity decreases and crystal structure is modified. Comonomer type and concentration determine the extent of these modifications, resulting in important changes in macroscopic properties. In particular, the excellent optical properties of the analyzed terpolymers make them very attractive for applications such as transparent film or packaging
Publisher version (URL)https://dx.doi.org/10.1016/j.polymertesting.2017.06.008
Appears in Collections:(ICTP) Artículos
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