| Summary: | 碩士 === 國立臺灣科技大學 === 高分子工程系 === 91 === The transparent low shrinked hybrid materials, DGEBA/MDA/M-PNs, was prepared by ring opening polymerization of diglycidyl ether of bisphenol A (DGEBA) and 4,4’-methylene dianiline(MDA) in the presence of M-PNs, the modified nanoscaled polysilicic acid (PN) with 3-glycidoxypropyltrimethoxysilane (GPTS), phenyltrimethoxysilane (PTS) and 3-(trimethoxysilyl) propylmethacrylate (TPA), respectively, to afford modified PN (M-PNs) including G-PN, P-PN and T-PN. The interfacial force between the organic and inorganic phase, microstructures, thermal and dynamic mechanical properties of the hybrid materials were investigated by FT-IR, TGA, DSC, DMA, TMA and Flexural test. The experimental results showed that M-PNs could not only act as low-profile additives (LPAs) to reduce the shrinkage of the hybrids during curing but also enhance their dynamic mechanical and thermal properties. The difference in the structures of the matrices/M-PNs should affect the internal stress and interfacial force of the resultant hybrids. The different phase behaviors and the parameters of internal stress to reduce the shrinkage of the DGEBA/MDA/M-PNs hybrid materials with were investigated in detail and were compared to each other.
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