Blends of Propylene-ran-ethylene and Propylene-ran-(1-butene) Copolymers: Crystal Superstructure and Mechanical Properties (Articolo in rivista)

Type

• Articolo in rivista (Classe)
• Prodotto della ricerca (Classe)

Label

• Blends of Propylene-ran-ethylene and Propylene-ran-(1-butene) Copolymers: Crystal Superstructure and Mechanical Properties (Articolo in rivista) (literal)

Anno

• 2006-01-01T00:00:00+01:00 (literal)

Alternative label

• Z. Bartczak 1, M. Pracella 2 (2006)
  Blends of Propylene-ran-ethylene and Propylene-ran-(1-butene) Copolymers: Crystal Superstructure and Mechanical Properties
  in European Polymer Journal
  (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

• Z. Bartczak 1, M. Pracella 2 (literal)

Pagina inizio

• 1819 (literal)

Pagina fine

• 1829 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

• 42 (literal)

Rivista

• European Polymer Journal (Rivista)

Note

• ISI Web of Science (WOS) (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

• 1. Centre of Molecular and Macromolecular Studies, PAS, Lodz, Polonia 2. Istituto Materiali Compositi e Biomedici, CNR, Pisa (literal)

Titolo

• Blends of Propylene-ran-ethylene and Propylene-ran-(1-butene) Copolymers: Crystal Superstructure and Mechanical Properties (literal)

Abstract

• Blends of isotactic propylene-ran-ethylene (EP) and propylene-ran-(1-butene) (BP) copolymers with various comonomer content (2–3.1 wt.% ethylene, 9.9 wt.% 1-butene), were prepared in Brabender internal mixer at various compositions (25/75, 50/50, 75/25). Static, impact and dynamic mechanical behavior of copolymers and their blends was investigated. The crystalline structure was studied by DSC and SAXS analysis. For all copolymers the lamellar thickness, crystallinity degree and glass transition temperature are lower than those of iPP homopolymer, depending on the comonomer content. It was found that the copolymers exhibit improved impact strength as compared to plain iPP, due to lower crystallinity and higher mobility of chains within amorphous component. Moreover, the elastic modulus as well as the yield behavior of the examined samples resulted to depend primarily on the amount of the crystalline phase and the thickness of the lamellar crystals, respectively. A linear dependence of yield stress on the logarithm of reciprocal lamellar thickness was observed for blends and copolymers, supporting the concept of thermal nucleation of dislocations which control the crystallographic slip processes initiated at the yield point. The blends of BPS with either EPS or EP2 display complete miscibility in the entire range of composition and their mechanical properties are intermediate between those of plain components, changing gradually with the composition. (literal)

Prodotto di

• Institute for composite and biomedical materials (IMCB) (Istituto)
• Polimeri, compositi e nanostrutture con proprietà funzionali programmate (PM.P02.003.001) (Modulo)

Autore CNR

• MARIANO PRACELLA (Unità di personale interno)

Insieme di parole chiave

• Keywords of "Blends of Propylene-ran-ethylene and Propylene-ran-(1-butene) Copolymers: Crystal Superstructure and Mechanical Properties" (Insieme di parole chiave)

Incoming links:

Autore CNR di

• MARIANO PRACELLA (Unità di personale interno)

Prodotto

• Institute for composite and biomedical materials (IMCB) (Istituto)
• Polimeri, compositi e nanostrutture con proprietà funzionali programmate (PM.P02.003.001) (Modulo)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi

• European Polymer Journal (Rivista)

Insieme di parole chiave di

• Keywords of "Blends of Propylene-ran-ethylene and Propylene-ran-(1-butene) Copolymers: Crystal Superstructure and Mechanical Properties" (Insieme di parole chiave)