Comparison of quasistatic to impact mechanical properties of multiwall carbon nanotube/polycarbonate composites

被引：5
|
作者：
Bruehwiler, Paul A. [1 ,2 ]
Barbezat, Michel [3 ]
Necola, Adly [3 ]
Kohls, Doug J. [4 ]
Bunk, Oliver [5 ]
Schaefer, Dale W. [4 ]
Poetschke, Petra [6 ]
机构：
[1] Empa, Swiss Fed Labs Mat Testing & Res, CH-9014 St Gallen, Switzerland
[2] Uppsala Univ, Dept Phys & Mat Sci, SE-75121 Uppsala, Sweden
[3] Empa, CH-8600 Dubendorf, Switzerland
[4] Univ Cincinnati, Dept Chem & Mat Engn, Cincinnati, OH 45221 USA
[5] Paul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Switzerland
[6] Leibniz Inst Polymer Res Dresden, Dept Polymer React & Blends, D-01069 Dresden, Germany
来源：
JOURNAL OF MATERIALS RESEARCH | 2010年 / 25卷 / 06期
基金：
美国国家科学基金会;
关键词：
LAYERED-SILICATE NANOCOMPOSITES; SMALL-ANGLE SCATTERING; NANOTUBE COMPOSITES; MOLECULAR-WEIGHT; TAYLOR IMPACT; STRAIN-RATE; POLYCARBONATE; BEHAVIOR; DEFORMATION; POLYMER;
D O I：
10.1557/JMR.2010.0139
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We report the quasistatic tensile and impact penetration properties (falling dart test) of injection-molded polycarbonate samples, as a function of multiwall carbon nanotube (MWNT) concentration (0.0-2.5%). The MWNT were incorporated by dilution of a commercial MWNT/polycarbonate masterbatch. The stiffness and quasistatic yield strength of the composites increased approximately linearly with MWNT concentration in all measurements. The energy absorbed in fracture was, however, a negative function of the MWNT concentration, and exhibited different dependencies in quasistatic and impact tests. Small-angle x-ray scattering (SAXS) showed that the dispersion of the MWNT was similar at all concentrations. The negative effects on energy absorption are attributed to agglomerates remaining in the samples, which were observed in optical microscopy and SAXS. Overall, there was a good correspondence between static and dynamic energy absorption.
引用
收藏
页码：1118 / 1130
页数：13
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