Miscibility, structure and properties of PP/PIB blends

Péter Szabó, Edina Epacher, E. Földes, B. Pukánszky

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

Polypropylene/polyisobutylene (PP/PIB) blends were prepared in the entire composition range in an internal mixer. The miscibility of the components was estimated by various methods including model calculations, using melting and crystallization characteristics, glass transition temperature, and solvent uptake experiments. The structure was characterized by microscopy, while the mechanical properties of the blends were studied by tensile tests. PP and PIB form heterogeneous two-phase blends in the entire range of composition, but dissolution of some PIB in the amorphous phase of PP is revealed by the composition dependence of various characteristics. The Flory-Huggins interaction parameters derived by the group contribution approach of Small, from the melting temperature of the PP phase, by dynamic mechanical (DMTA) analysis and solvent uptake experiments indicate partial miscibility of PP and PIB, which is further supported by the morphology of the blends, and the composition dependence of mechanical properties. The glass transition temperature of the elastomer phase decreases with increasing PP content because of the development of thermal stresses as a result of good adhesion and different thermal expansion of the two polymers.

Original languageEnglish
Pages (from-to)307-315
Number of pages9
JournalMaterials Science and Engineering A
Volume383
Issue number2
DOIs
Publication statusPublished - Oct 15 2004

Fingerprint

polyisobutylene
Polypropylenes
polypropylene
solubility
Solubility
Chemical analysis
glass transition temperature
melting
mechanical properties
Elastomers
Mechanical properties
elastomers
Dynamic mechanical analysis
tensile tests
thermal stresses
Crystallization
Thermal stress
Thermal expansion
Melting point
thermal expansion

Keywords

  • Compatibility
  • Polyisobutylene
  • Polymer blends
  • Polypropylene

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Miscibility, structure and properties of PP/PIB blends. / Szabó, Péter; Epacher, Edina; Földes, E.; Pukánszky, B.

In: Materials Science and Engineering A, Vol. 383, No. 2, 15.10.2004, p. 307-315.

Research output: Contribution to journalArticle

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