Sol–gel derived composites from poly(silicic acid) and 2-hydroxyethylmethacrylate: thermal, physical and morphological properties

Habsuda, Jana; Simon, George P; Cheng, Yi‐Bing; Hewitt, David G.; Diggins, David R; Toh, H. K.; Cser, F.

doi:10.1016/s0032-3861(02)00246-x

Cited by 47 publications

(31 citation statements)

References 34 publications

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“…It can be observed that with the increased content of functionalized NaTiNTs in the nanocomposite the T g of the epoxy matrix also increases (from 72 to 79 8C for nanocomposites with 3 wt.% of NaTiNTs functionalized with APTES). The increase in the T g of the epoxy matrix in the nanocomposites can be explained by the presence, dispersion and interaction between the functionalized NaTiNTs and the epoxy matrix [35][36][37][38]. The stronger the interaction between those two phases and the homogeneity of the dispersion of nanofillers in the polymer matrix, the smaller is the free volume for chain mobility, which leads to an increase in T g .…”

Section: The Epoxy and Nanocompositesmentioning

confidence: 99%

Synthesis of silane functionalized sodium titanate nanotubes and their influence on thermal and mechanical properties of epoxy nanocomposite

Brnardić

Vesel

Umek

et al. 2013

Phys. Status Solidi A

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Sodium titanate nanotubes (NaTiNTs) were prepared by hydrothermal method and functionalized with three different silane coupling agents. The existence of the chemical bond between silane molecules and nanoparticles was confirmed by scanning electron microscopy (SEM) equipped with electron dispersive X-ray spectroscopy (EDS) mapping, Fourier transform infrared (FTIR) spectroscopy, and simultaneous differential scanning calorimetry-thermogravimetric analysis (DSC-TGA). NaTiNTs before and after functionalization were characterized by X-ray diffraction (XRD) technique. Functionalized NaTiNTs were used to prepare epoxy-based nanocomposites with three different wt.% of nanofillers (1, 2, and 3 wt.% per epoxy). The thermal and mechanical properties of prepared nanocomposites were studied by DSC, DSC-TGA, and dynamic mechanical analysis (DMA). The obtained results were compared to the epoxy. The results showed that the glass transition temperature increased from 72 to 79 8C. Storage modulus increased by 10.4% at 3 wt.% nanotubes. From all results appropriate functionalized NaTiNTs were chosen and nanocomposites for determination of combustion properties by cone calorimeter were prepared (1, 3, and 5 wt.% of nanofiller per epoxy). Significant reduction of the heat release rate (HRR) depending on the inorganic particles loading was observed. The peak value for HRR was reduced by about 40% compared to the epoxy, while ignition time and total heat release (THR) are not significantly affected by the presence of the inorganic particles.

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Section: The Epoxy and Nanocompositesmentioning

confidence: 99%

Synthesis of silane functionalized sodium titanate nanotubes and their influence on thermal and mechanical properties of epoxy nanocomposite

Brnardić

Vesel

Umek

et al. 2013

Phys. Status Solidi A

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“…A detailed background on the theory and technique of PALS can be found elsewhere [28][29][30]. Briefly speaking, the lifetimes and intensities of positrons, which are generated from a 22 Na source, are measured and used to estimate the local free volumes inside polymers.…”

Section: Fig 1 (A)mentioning

confidence: 99%

Dielectric and mechanical properties of diglycidyl ether of bisphenol a modified by a new fluoro-terminated hyperbranched poly(phenylene oxide)

et al. 2013

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Diglycidyl ether of bisphenol A (DGEBA)/fluoro-terminated hyperbranched poly(phenylene oxide) (FHPPO) composites with improved mechanical and dielectric performances were prepared by blending a FHPPO with DGEBA. The low-polarity building blocks, abundant fluorinated terminal groups, and the inherent free volume brought by FHPPO efficiently lowered the dielectric constant and the dissipation factor. The free volumes of the cured DGEBA/FHPPO composites, which were quantified by positron annihilation lifetime spectroscopy, increased with the FHPPO loading. The moisture absorption of composites also decreased after the introduction of FHPPO due to the hydrophobicity of fluorinated substituents. Dynamic mechanical analysis tests and scanning electron morphology revealed that FHPPO phase separated from the composites during the curing process. The average diameter of dispersed FHPPO particles increased proportionally with the FHPPO loading. Composites with dispersed particle size of around 150 nm showed the best comprehensive mechanical performance. In addition, incorporation of FHPPO, which has lots of aromatic structures, into DGEBA also increased the thermal stabilities. POLYM. COMPOS., 34:1051-1060,

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“…Therefore, R g was related to the size of inorganic domains and could be calculated from the slope of the linear region of a plot of ln[I(q)] versus q 2 , according to Equation 3 (Guinier's relation): [26,27] IðqÞ…”

Section: Resultsmentioning

confidence: 99%

Preparation and Characterization of Trialkoxysilane‐Containing Acrylic Resin/Alumina Hybrid Materials

Zhou

You

et al. 2006

Macro Materials & Eng

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Summary: In the present study (3‐methacryloxypropyl)trimethoxysilane (MPMS) containing acrylic resin/alumina hybrid materials with various alumina contents were prepared. The effects of ethylacetoacetate (EAA) content, catalyst type, and water content during sol–gel process for alumina sols on the microstructure and properties of the hybrid materials were investigated by SAXS, AFM, DSC, TGA, and nano‐indentation tester, respectively. It was found that the hybrid materials exhibited a homogeneity and the alumina phase of the hybrids had mass fractal dimension and open structure. The thermal and mechanical properties of the hybrid materials were obviously improved when alumina was incorporated. The EAA contents, catalyst type, and water content during sol–gel process for alumina sols had obvious effects on the microstructure and properties of the hybrid materials.Typical load–displacement curves of the pure acrylic resin and hybrid materials with increasing alumina content.magnified imageTypical load–displacement curves of the pure acrylic resin and hybrid materials with increasing alumina content.

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Sol–gel derived composites from poly(silicic acid) and 2-hydroxyethylmethacrylate: thermal, physical and morphological properties

Cited by 47 publications

References 34 publications

Synthesis of silane functionalized sodium titanate nanotubes and their influence on thermal and mechanical properties of epoxy nanocomposite

Synthesis of silane functionalized sodium titanate nanotubes and their influence on thermal and mechanical properties of epoxy nanocomposite

Dielectric and mechanical properties of diglycidyl ether of bisphenol a modified by a new fluoro-terminated hyperbranched poly(phenylene oxide)

Preparation and Characterization of Trialkoxysilane‐Containing Acrylic Resin/Alumina Hybrid Materials

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