TY - JOUR

T1 - Properties and Semicrystalline Structure Evolution of Polypropylene/Montmorillonite Nanocomposites under Mechanical Load

A1 - Stribeck,Norbert

A1 - Zeinolebadi,Ahmad

A1 - Ganjaee Sari,Morteza

A1 - Botta,Stephan

A1 - Jankova Atanasova,Katja

A1 - Hvilsted,Søren

A1 - Drozdov,Aleksey

A1 - Klitkou,Rasmus

A1 - Potarniche,Catalina-Gabriela

A1 - Christiansen,Jesper deClaville

A1 - Ermini,Valentina

AU - Stribeck,Norbert

AU - Zeinolebadi,Ahmad

AU - Ganjaee Sari,Morteza

AU - Botta,Stephan

AU - Jankova Atanasova,Katja

AU - Hvilsted,Søren

AU - Drozdov,Aleksey

AU - Klitkou,Rasmus

AU - Potarniche,Catalina-Gabriela

AU - Christiansen,Jesper deClaville

AU - Ermini,Valentina

PB - American Chemical Society

PY - 2012

Y1 - 2012

N2 - Small-angle X-ray scattering (SAXS) monitors tensile and load-cycling tests of metallocene isotactic polypropylene (PP), a blend of PP and montmorillonite (MMT), and two block copolymer compatibilized PP/MMT nanocomposites. Mechanical properties of the materials are similar, but the semicrystalline nanostructure of the PP differs. This is explained by a nucleation effect of the MMT. Competitive crystal growth diminishes crystallite sizes. The reinforcing effect of the MMT filler appears consumed by weakening the PP matrix. Decays of mechanical and nanostructure response in dynamic load cycling indicate materials fatigue. Lifetimes describe the reinforcing and weakening effects. Addition of 3% MMT halves the fortifying effect of the PP nanostructure. A net gain of reinforcement (11%) is observed with the highly compatibilized composite in which the strength of the semicrystalline PP is reduced to 25%. Other results concern the evolution of Strobl’s block structure and void formation during tensile loading.

AB - Small-angle X-ray scattering (SAXS) monitors tensile and load-cycling tests of metallocene isotactic polypropylene (PP), a blend of PP and montmorillonite (MMT), and two block copolymer compatibilized PP/MMT nanocomposites. Mechanical properties of the materials are similar, but the semicrystalline nanostructure of the PP differs. This is explained by a nucleation effect of the MMT. Competitive crystal growth diminishes crystallite sizes. The reinforcing effect of the MMT filler appears consumed by weakening the PP matrix. Decays of mechanical and nanostructure response in dynamic load cycling indicate materials fatigue. Lifetimes describe the reinforcing and weakening effects. Addition of 3% MMT halves the fortifying effect of the PP nanostructure. A net gain of reinforcement (11%) is observed with the highly compatibilized composite in which the strength of the semicrystalline PP is reduced to 25%. Other results concern the evolution of Strobl’s block structure and void formation during tensile loading.

UR - http://pubs.acs.org/doi/full/10.1021/ma202004f

U2 - 10.1021/ma202004f

DO - 10.1021/ma202004f

JO - Macromolecules

JF - Macromolecules

SN - 0024-9297

IS - 2

VL - 45

SP - 962

EP - 973

ER -