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  • 1990-1994  (1)
  • 1945-1949
  • Polypropylene/polystyreneblends  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Colloid & polymer science 268 (1990), S. 528-535 
    ISSN: 1435-1536
    Keywords: Polypropylene/polystyreneblends ; nucleation ; isothermalcrystallization ; spheruliticgrowth
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Crystallization kinetic parameters, such as spherulitic growth rates, nucleation densities, and Avrami-exponents, have been determined by optical microscopy for isotactic polypropylene blended with atactic polystyrene. It is found that the crystallization of iPP is strongly influenced by the presence of polystyrene. With increasing PS concentration in the blend, the nucleation densities decrease, while the spherulitic growth rates as well as the positions of thermal peaks, measured by DSC, remain independent of sample composition. Due to the formation of interfaces as a consequence of increasing dispersion of polystyrene the nucleation changes from preferentially thermal to athermal.
    Type of Medium: Electronic Resource
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