Surlyn�/silicate hybrid materials. I. Polymerin situ sol-gel process and structure characterization

Siuzdak, David A.; Start, Paul R.; Mauritz, Kenneth A.

doi:10.1002/1097-4628(20000923)77:13<2832::aid-app5>3.0.co;2-k

Cited by 32 publications

(25 citation statements)

References 30 publications

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“…This may indicate that Q 4 transformed into Q 3 as the SiO 2 TiO 2 content increased. The relative degree of Q 3 and Q 4 coordination states is in general agreement with the structural interpretation of the FTIR results, and it might be inferred that some degree of porosity is present since “porous” silicate nanoparticles have a considerable degree of intramolecular disconnection 4, 16…”

Section: Resultssupporting

confidence: 81%

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Synthesis of polyethylene‐octene elastomer/SiO₂‐TiO₂ nanocomposites via in situ polymerization: Properties and characterization of the hybrid

2005

J. Polym. Sci. A Polym. Chem.

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In this study, a silicic acid and tetra isopropyl ortho titanate ceramic precursor and a metallocene polyethylene‐octene elastomer (POE) or acrylic acid grafted metallocene polyethylene‐octene elastomer (POE‐g‐AA) were used in the preparation of hybrids (POE/SiO2TiO2 and POE‐g‐AA/SiO2TiO2) using an in situ sol‐gel process, with a view to identifying a hybrid with improved thermal and mechanical properties. Hybrids were characterized using Fourier transform infrared spectroscopy, 29Si solid‐state nuclear magnetic resonance (NMR), X‐ray diffraction, differential scanning calorimetry, thermogravimetry analysis, dynamic mechanical thermal analysis, and Instron mechanical testing. Properties of the POE‐g‐AA/SiO2TiO2 hybrid were superior to those of the POE/SiO2TiO2 hybrid. This was because the carboxylic acid groups of acrylic acid acted as coordination sites for the silica‐titania phase to allow the formation of stronger chemical bonds. 29Si solid‐state NMR showed that Si atoms coordinated around SiO4 units were predominantly Q3 and Q4. The 10 wt % SiO2TiO2 hybrids gave the maximum values of tensile strength and glass transition temperature in both POE/SiO2TiO2 and POE‐g‐AA/SiO2TiO2. It is proposed that above this wt %, excess SiO2TiO2 particles caused separation between the organic and inorganic phases. © 2005 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 43: 1690–1701, 2005

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Section: Resultssupporting

confidence: 81%

“…Organometallic compounds (M[OC n H 2n + 1 ] 2 , M = Si, Ti, Sn, Al, etc.) are generally used as the ceramic precursor, tetraethoxysilane (TEOS) being the most commonly used 7, 16, 17…”

Section: Introductionmentioning

confidence: 99%

Synthesis of polyethylene‐octene elastomer/SiO₂‐TiO₂ nanocomposites via in situ polymerization: Properties and characterization of the hybrid

2005

J. Polym. Sci. A Polym. Chem.

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“…In our studies of TEOS‐modified Surlyn®, Fourier transform infrared (FTIR) and 29 Si solid‐state NMR spectra provided evidence of bonded silicate structures that were incorporated in both the acid and Zn 2+ ionomer forms 11, 12. Environmental scanning electron microscopy/energy‐dispersive analysis (ESEM/EDS) with X‐ray evidence reinforced the conclusion that a significant silicate component can be incorporated within the films to an extent that depends on TEOS permeation time and film thickness.…”

Section: Introductionmentioning

confidence: 81%

“…Related to the work presented here were previous experiments in which Surlyn®10/silicate hybrids were created via polymer in situ sol–gel reactions for tetraethylorthosilicate (TEOS) in the presence of water that is necessary for alkoxide hydrolysis and a swelling solvent 11, 12. Recent similar studies13 have suggested that it is also possible to create Surlyn®/titanate hybrids with this sol–gel process for a titanium alkoxide.…”

Section: Introductionmentioning

confidence: 83%

Manufacture and properties of chitosan/N,O‐carboxymethylated chitosan/viscose rayon antibacterial fibers

Liu

Zhuang

et al. 2002

J of Applied Polymer Sci

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Chitosan/N,O-carboxymethylated chitosan/viscose rayon antibacterial fibers (CNVFs) were prepared by blending chitosan emulsion, N,O-carboxymethylated chitosan (N,O-CMC), and viscose rayon together for spinning. The fibers were characterized by transmission electron microscopy (TEM), differential scanning calorimetry (DSC), and thermal gravimetric analysis (TGA). TEM micrographs showed that chitosan microparticles dispersed uniformly along the oriented direction with the mean size ranging from 0.1 to 0.5 m. DSC spectra of these fibers showed that no significant change in thermal property was caused by adding chitosan and N,O-CMC into the viscose rayon. TGA spectra showed that the good moisture retentivity was not affected by the addition of chitosan and N,O-CMC. Both DSC and TGA suggested that the decomposing tendency of the viscose rayon above 250°C seemed to be weakened by the chitosan. The fibers' mechanical properties and antibacterial activities against Escherchia coli, Staphylococcus aureus, and Candida albicans were measured. Although the addition of chitosan slightly reduced the mechanical properties, the antibacterial fibers' properties were obtained and were found to meet commercial requirements. CNVF exhibited excellent antibacterial activity against E. coli, S. aureus, and C. albicans. The antibacterial activity increased along with the chitosan concentration and was not greatly affected by 15 washings in water. Scanning electron microscopy (SEM) was used to observe the morphology of bacteria cells incubated together with the antibacterial or reference fibers. SEM micrographs demonstrated that greater amounts of bacteria could be adsorbed by the antibacterial fiber than by the reference fiber; these bacteria were overwhelmingly destroyed and killed.

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“…[13,14] The inorganic precursors used in the sol-gel process are usually silicon/ metal alkoxide [M(OC n H 2nþ1 ) z , where M ¼ Si, Ti, Al, Sn, Zr, etc. ], in which tetraethoxysilane (TEOS) is most frequently employed, [15][16][17] titanium n-butoxide [Ti(OBu) n ] 4 is occasionally tried as well, [18,19] but aluminum alkoxides and other metal alkoxides are very seldom adopted due to their high reactivity.…”

Section: Introductionmentioning

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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Surlyn�/silicate hybrid materials. I. Polymerin situ sol-gel process and structure characterization

Cited by 32 publications

References 30 publications

Synthesis of polyethylene‐octene elastomer/SiO₂‐TiO₂ nanocomposites via in situ polymerization: Properties and characterization of the hybrid

Synthesis of polyethylene‐octene elastomer/SiO₂‐TiO₂ nanocomposites via in situ polymerization: Properties and characterization of the hybrid

Manufacture and properties of chitosan/N,O‐carboxymethylated chitosan/viscose rayon antibacterial fibers

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

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Surlyn�/silicate hybrid materials. I. Polymerin situ sol-gel process and structure characterization

Cited by 32 publications

References 30 publications

Synthesis of polyethylene‐octene elastomer/SiO2‐TiO2 nanocomposites via in situ polymerization: Properties and characterization of the hybrid

Synthesis of polyethylene‐octene elastomer/SiO2‐TiO2 nanocomposites via in situ polymerization: Properties and characterization of the hybrid

Manufacture and properties of chitosan/N,O‐carboxymethylated chitosan/viscose rayon antibacterial fibers

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

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Synthesis of polyethylene‐octene elastomer/SiO₂‐TiO₂ nanocomposites via in situ polymerization: Properties and characterization of the hybrid

Synthesis of polyethylene‐octene elastomer/SiO₂‐TiO₂ nanocomposites via in situ polymerization: Properties and characterization of the hybrid