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Title

Unprecedented dependence of stiffness parameters and crystallinity on comonomer content in rapidly cooled propylene-co-1-pentene copolymers

AuthorsGarcía-Peñas, A. CSIC ORCID; Gómez-Elvira González, José Manuel CSIC ORCID ; Lorenzo, Vicente; Pérez, Ernesto CSIC ORCID; Cerrada, María L. CSIC ORCID
KeywordsPropylene-co-1-pentene copolymers
Monoclinic form
Mesomorphic entities
Trigonal crystallites
Stiffness
Crystallinity
Issue Date4-Oct-2017
PublisherElsevier
CitationPolymer 130: 17-25 (2017)
AbstractA thorough evaluation of the mechanical behavior exhibited by fast crystallized propylene-1-pentene copolymers synthesized in a broad range of 1-pentene compositions is here described. Different mechanical magnitudes derived from loading, creep and unloading processes in depth sensing indentation measurements are correlated to structural features. Several ordered forms are able to be developed at the composition interval analyzed in these propylene-1-pentene copolymers applying a fast cooling processing. Moreover, either a single polymorph or distinct ratios of two crystalline lattices can be obtained, depending on comonomer content. Crystallinity as well as the type of existing crystallites play a critical role in the value of those mechanical magnitudes. An atypical and unprecedented dependence of either stiffness or crystallinity on 1-pentene content is observed in these copolymers, associated with their capability of crystallizing in the trigonal form.
Publisher version (URL)http://dx.doi.org/10.1016/j.polymer.2017.10.006
URIhttp://hdl.handle.net/10261/157737
DOI10.1016/j.polymer.2017.10.006
ISSN0032-3861
Appears in Collections:(ICTP) Artículos

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