期刊
ACS APPLIED MATERIALS & INTERFACES
卷 6, 期 21, 页码 19456-19464出版社
AMER CHEMICAL SOC
DOI: 10.1021/am505874t
关键词
liquid-crystalline epoxy resins; thermomagnetic processing; molecular orientation; mechanical properties
资金
- Critical Materials Institute, an Energy Innovation Hub - U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy , and Advanced Manufacturing Office [DE-AC05-00OR22725]
- UT-Battelle, LLC
- Air Force Office of Scientific Research [FA9550-12-1-0108]
A thermomagnetic processing method was used to produce a biphenyl-based liquid-crystalline epoxy resin (LCER) with oriented liquid-crystalline (LC) domains. The orientation of the LCER was confirmed and quantified using two-dimensional X-ray diffraction. The effect of molecular alignment on the mechanical and thermomechanical properties of the LCER was investigated using nanoindentation and thermomechanical analysis, respectively. The effect of the orientation on the fracture behavior was also examined. The results showed that macroscopic orientation of the LC domains was achieved, resulting in an epoxy network with an anisotropic modulus, hardness, creep behavior, and thermal expansion.
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