Physical properties of epoxy resin self‐reinforced with organic rigid‐rod compounds |
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| Authors: | SP Lin JL Han RZ Chen JT Yeh KH Hsieh |
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| Affiliation: | 1. Institute of Polymer Science and Engineering, National Taiwan University, Taipei 106, Taiwan;2. Department of Chemical and Materials Engineering, National I‐Lan University, I‐Lan 260, Taiwan;3. Department of Chemical Engineering, National Taiwan University, Taipei 106, Taiwan;4. Department of Textile Science, Nanya Institute of Technology, Taoyuan 414, Taiwan;5. Department of Chemical Engineering, National Taiwan University, Taipei 106, TaiwanInstitute of Polymer Science and Engineering, National Taiwan University, Taipei 106, Taiwan |
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| Abstract: | In this study, nanoscale organic rigid‐rod compounds were utilized as self‐reinforcing composites to enhance the physical properties of an epoxy resin diglycidylether of bisphenol A (DGEBA). First, DGEBA was used to react with an aromatic diisocyanate of methylene diphenyl isocyanate (MDI) to form an urethane linkage. Next, four different organic rigid‐rod compounds including 4′‐hydroxyphenyl‐4‐hydroxybenzoate, phenyl 4‐hydroxybenzoate, 4,4′‐isopropylidenediphenol, and 2‐naphthol were incorporated to react individually with the remaining isocyanate groups of the MDI units after the previous step. Finally, the four different rigid‐rod‐modified DGEBA systems were examined using nuclear magnetic resonance spectroscopy, Fourier transform infrared spectroscopy, scanning electric microscopy, and mechanical property analyses. Each of the four rigid‐rod‐reinforced DGEBA systems exhibited greatly improved mechanical properties, e.g., higher tensile strengths and fracture energies. POLYM. ENG. SCI., 47:1281–1288, 2007. © 2007 Society of Plastics Engineers |
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