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Orientational Behavior of Ellipsoidal Silica‐Coated Hematite Nanoparticles Integrated within an Elastomeric Matrix and its Mechanical Reinforcement
Author(s) -
SánchezFerrer Antoni,
Mezzenga Raffaele,
Dietsch Hervé
Publication year - 2011
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201000720
Subject(s) - elastomer , small angle x ray scattering , nanoparticle , materials science , composite material , modulus , deformation (meteorology) , elastic modulus , dynamic mechanical analysis , matrix (chemical analysis) , chemical engineering , polymer , nanotechnology , scattering , optics , physics , engineering
The mechanical and orientational properties of IOENs consisting of integrated ellipsoidal SCH spindle‐type nanoparticles within an elastomeric matrix are reported. The influence of the SCH surface chemistry, leading either to dispersed nanoparticles or crosslinked nanoparticles within the surrounding elastomeric matrix, is studied by mechanical uniaxial deformation (stress‐strain) and SAXS measurements under stress. Without surface modifications, the SCH nanoparticles act as defects, and the Young's modulus of the elastomeric matrix remains unmodified. Surface‐modified SCH nanoparticles acting as crosslinkers increase Young's modulus by a factor 1.2. SAXS measurements demonstrate that the integrated ellipsoidal nanoparticles orient upon a deformation larger than 50% independently of the specific integration strategy.