ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
In our previous works, a double percolation mechanism of stress volumes was proposed toexplain the special effects generated by small amounts of grafted nanoparticles. Accordingly, it isinferred that strengthening nanoparticle agglomerates and enhancing nanoparticles/polymer matrixinterfacial interaction are the key issues to improve mechanical performance of the matrix polymer.To confirm this idea, in-situ crosslinking was adopted to prepare nanocomposites by adding reactivemonomers and crosslinking agents during melt compounding of nano-silica with polypropylene (PP).It was found that the grafted polymer chains were successfully crosslinked and chemically bonded tothe nano-silica forming crosslinked networks. Meanwhile, matrix molecular chains penetratedthrough the networks to establish the so-called semi-IPN structure that interconnected nanoparticlesby the networks and improved filler/matrix interfacial interaction. As a result, the tiny nanoparticleswere well distributed in the matrix and the toughening and reinforcing effects of the nanoparticles onthe matrix were brought into play at rather low filler loading, as evidenced by mechanicalperformance tests. Besides, β-crystal was detected in the nanocomposites experienced in-situcrosslinking reaction
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.334-335.733.pdf
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