Abstract
Nano-sized silica particles were modified with methacryloxy- propyltrimethoxysilane (MPS) followed by in situ copolymerization of methyl methacrylate (MMA) and butyl acrylate (BA). These modified nanoparticles were compounded with polypropylene (PP) to prepare PP/silica nanocomposites. PMMA grafted on nano-silica enhances the dispersion of the nanoparticles and interfacial adhesion, decreases the size of PP spherulites in nanocomposites and leads to increasing the Youngs modulus and toughness of PP/silica nanocomposites at the same time. PBA grafted on nano-silica further improves the dispersion and the interfacial interaction, decreases the size of PP spherulites in PP/silica nanocomposite and leads to further toughening the PP/silica nanocomposite. But, its low modulus decreases the modulus of the PP/silica nanocomposite. The nanocomposites with PP and nano-silica particles modified by P(MMA-co-BA) have balanced stiffness and toughness due to the moderate modulus and solubility parameter of P(MMA-co-BA).
Original language | English |
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Pages (from-to) | 685-694 |
Number of pages | 10 |
Journal | Chinese Journal of Polymer Science (English Edition) |
Volume | 27 |
Issue number | 5 |
DOIs | |
Publication status | Published - Sept 2009 |
Externally published | Yes |
Keywords
- Interface
- Mechanical properties
- Nano composites
ASJC Scopus subject areas
- General Chemical Engineering
- Polymers and Plastics
- Organic Chemistry