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Effect of Silica‐Coated Poly(butyl methacrylate) ‐block‐ poly(methyl methacrylate) Double‐Shell Particles on the Mechanical Properties of PMMA Composites
Author(s) -
Chakkalakal Golda Louis,
Alexandre Michaël,
BoschettideFierro Adriana,
Abetz Volker
Publication year - 2012
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.201100365
Subject(s) - materials science , composite material , silane , methyl methacrylate , methacrylate , shell (structure) , dispersion (optics) , fourier transform infrared spectroscopy , particle (ecology) , copolymer , chemical engineering , polymer , oceanography , physics , geology , optics , engineering
Silica nanoparticles with an average diameter of 12 nm are grafted with PBMA ‐b‐ PMMA double shells through typical sequential ATRP from bromoisobutyrate initiators anchored at the silica surface using an epoxysilane. A commercially available PMMA homopolymer is used for the preparation of composites with unmodified, silane‐modified and double‐shell ‐modified silica particles. Good mechanical properties are obtained for silica double shell containing systems. The silica content in double shell particle systems is varied from 0 to 2.5 wt%. A significant improvement in impact properties is observed. The surface‐modified silica particles are characterized by ATR‐FTIR, NMR, GPC, and thermal analyses. TEM analysis is used to analyze the nature of dispersion of particles in the composites.