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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
被引:7
作者:
Chakkalakal, Golda Louis
[1
]
Alexandre, Michael
[2
]
Boschetti-de-Fierro, Adriana
[1
]
Abetz, Volker
[1
]
机构:
[1] Helmholtz Zentrum Geesthacht, Polymer Res Inst, D-21502 Geesthacht, Germany
[2] Univ Liege, CERM, B-4000 Liege, Belgium
关键词:
atom-transfer radical polymerization (ATRP);
composites;
core;
shell particles;
poly(methyl methacrylate)s (PMMA);
TRANSFER RADICAL POLYMERIZATION;
NANOPARTICLES;
SURFACE;
SIZE;
D O I:
10.1002/mame.201100365
中图分类号:
T [工业技术];
学科分类号:
08 ;
摘要:
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.
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页码:887 / 893
页数:7
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