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Morphology, Crystallization Behavior, and Mechanical Properties of Isotactic Poly(propylene) Nanocomposites based on Organophilic Boehmites
Author(s) -
Streller Rouven C.,
Thomann Ralf,
Torno Olaf,
Mülhaupt Rolf
Publication year - 2009
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/mame.200800360
Subject(s) - materials science , boehmite , crystallite , crystallization , nanocomposite , tacticity , nucleation , composite material , elongation , thermal stability , elastomer , nanometre , morphology (biology) , chemical engineering , polymer , ultimate tensile strength , organic chemistry , polymerization , aluminium , chemistry , genetics , biology , engineering , metallurgy
iPP/organoboehmite nanocomposites were prepared to examine the influence of both boehmite crystallite size and organophilic boehmite modification on morphology development, thermal, and mechanical properties. Effective deagglomeration of the micrometer‐scaled organoboehmites was achieved, producing uniform dispersions of nanometer‐scaled boehmite crystallite assemblies within the iPP matrix. CS‐modified organoboehmites gave improved stiffness at the expense of elongation at break and impact strength. In contrast to CS, boehmites modified with OS2 lowered iPP crystallization (“anti‐nucleation effect”) without affecting crystal modification, affording iPP nanocomposites with significantly larger elongation at break and strain induced crystallization.