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The effect of the interface structure of different surface‐modified nano‐SiO 2 on the mechanical properties of nylon 66 composites
Author(s) -
Xu Xiangmin,
Li Binjie,
Lu Huimin,
Zhang Zhijun,
Wang Honggang
Publication year - 2007
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.27325
Subject(s) - materials science , composite material , toughness , nanocomposite , ultimate tensile strength , composite number , nanoparticle , modulus , nylon 6 , izod impact strength test , crystallization , adhesion , surface modification , compounding , polymer , chemical engineering , nanotechnology , engineering
Abstract The nylon 66‐based nanocomposites containing two different surface‐modified and unmodified SiO 2 nanoparticles were prepared by melt compounding. The interface structure formed in different composite system and their influences on material mechanical properties were investigated. The results indicated that the interfacial interactions differed between composite systems. The strong interfacial adhesion helped to increase tensile strength and elastic modulus of composites; whereas, the presence of modification layer in silica surface could enhance the toughness of composites, but the improvement of final material toughness was also correlated with the density of the adhered nylon 66 chains around silica nanoparticles. In addition, the results also indicated that the addition of surface‐modified silica nanoparticles has a distinct influence on the nonisothermal crystallization behavior of the nylon 66 matrix when compared with the unmodified silica nanoparticle. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2008