Synthesis of IPN polymer hybrids of polystyrene gel and silica gel by an in-situ radical polymerization method

Tamaki, Ryo; Chujo, Yoshiki

doi:10.1039/a708915e

Cited by 48 publications

(56 citation statements)

References 20 publications

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“…In this respect, there is various research such as hydrogen bond, 11 covalent bond, 12 -stacking effect, 13 ionic bond, 14 and interpenetrating polymer network (IPN). 15,16 Particularly in the rubber processing field, Ikeda 17 and Murakami et al 18 reported polycondensation of tetraalkoxysilanes in the presence of a silane-coupling agent. Recently, we have found that the modified styrenebutadiene rubber (Si-SBR) latex containing triethoxysilyl group could improve the mechanical and dynamic properties of SBR-silica composites.…”

Section: Introductionmentioning

confidence: 98%

Synthesis of polychloroprene–silica composites by sol‐gel method in the presence of modified polychloroprene containing triethoxysilyl group

Sunada

Takenaka

Shiomi

2005

J of Applied Polymer Sci

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Triethoxysilyl-modified polychloroprene (CR) latex was synthesized by the emulsion copolymerization of 2-(3-triethoxysilylpropyl)-1,3-butadiene with chloroprene. This latex was mixed with unmodified CR latex and tetraethoxysilane to obtain CR-silica composites by sol-gel reaction in the latex. SEM observation showed that the silica particles in unvulcanized composites have various diameters ranging from 0.1 to 0.6 m, and their size became larger with the decrease of the silica content. Vulcanized CR-silica composites showed that the tensile modulus and tear strength improved with an increase of the amount of modified CR.

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Section: Introductionmentioning

confidence: 98%

Synthesis of polychloroprene–silica composites by sol‐gel method in the presence of modified polychloroprene containing triethoxysilyl group

Sunada

Takenaka

Shiomi

2005

J of Applied Polymer Sci

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“…[3] The organic material often is a polymer such as polystyrene [4] or the thermoresponsive poly(N-isopropylacrylamide) (pNIPAm) [2,5,6] which has a lower critical solution temperature (LCST) at 32 8C. [7] In most cases, the inorganic component consists of silica, but it can be formed from titanium oxide [8] or zirconia oxide, [9] as well.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Hydrogel‐Silica Composite Films by Electrochemically Triggered Deposition

Bünsow

Petri

Johannsmann

2009

Macromolecular Symposia

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Summary:The electrochemical formation of hybrid films containing both a polymer and porous silica was performed in two different ways. In both cases, the deposition of the inorganic oxide was triggered by an electrochemical pH modulation in front of an electrode. Hydrolysis and condensation of the alkoxysilane precursors in the pH gradient yielded silica structures on the electrode surface. In the first route, an electrode was employed which had been previously coated with a polymer hydrogel. In this case, the silica readily precipitated into the hydrogel, forming rigid structures with thicknesses in the range of 100 nm. A second approach makes use of the deposition of an alkoxyvinylsilane precursor. Subsequent electrochemically induced polymerization of a polymer hydrogel inside these films is possible, but yields lower thicknesses than route I. This is explained by a blocking of the electrode by the vinylfunctionalized silica film.

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“…The previous studies justified that the pore size in the porous silica corresponds to the domain size of organic polymers in the original polymer hybrids. 16,31,33 For example, we reported the notable correlation between the pore size of polymer hybrids having the starburst dendrimer and the generation of the dendrimer employed. 31 Therefore, it is possible to verify the dispersity of organic polymers in the hybrids by measuring the pore size, pore volume, and the surface area.…”

Section: Nitrogen Adsorption Porosimetrymentioning

confidence: 99%

Synthesis and Photoluminescence Properties of Pyrene-Incorporated Organic-Inorganic Polymer Hybrids

Kokado

Iwamura

Chujo

2008

Polym J

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Pyrene-incorporated organic-inorganic polymer hybrids were synthesized from methacryloyl monomers, tetramethoxysilane (TMOS) and pyrene via the in situ polymerization method. The photoluminescence properties of the incorporated pyrene chromophore were studied by using hybrids those were obtained by changing the ratio of inorganic moieties. As compared with organic polymers or a silica glass, the excimer emission of pyrene chromophore increased in the polymer hybrids. The excimer emission can be affected by changing the organic/inorganic ratio or the species of organic polymers. In the case of employing hydrophilic polymers, the excimer emission intensity of pyrene increased. Also, the excimer emission intensity of pyrene increased in the polymer hybrids having low organic polymer content. Furthermore, the sensitivity against oxygen of these excimer emissions in the polymer hybrids was found to be tuned by the organic/inorganic ratio in the polymer hybrids or the oxygen permeability of the organic polymers employed for hybridization.KEY WORDS: Sol-Gel / Hybrid / Pyrene / Photoluminescence / Oxygen / The organic-inorganic hybrid materials have received considerable interest in the past decade because of the expectation of developing various materials with the interesting properties resulted from incorporation of organic and inorganic constituents, and their homogeneities at the nano-meter scale.

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Synthesis of IPN polymer hybrids of polystyrene gel and silica gel by an in-situ radical polymerization method

Cited by 48 publications

References 20 publications

Synthesis of polychloroprene–silica composites by sol‐gel method in the presence of modified polychloroprene containing triethoxysilyl group

Synthesis of polychloroprene–silica composites by sol‐gel method in the presence of modified polychloroprene containing triethoxysilyl group

Preparation of Hydrogel‐Silica Composite Films by Electrochemically Triggered Deposition

Synthesis and Photoluminescence Properties of Pyrene-Incorporated Organic-Inorganic Polymer Hybrids

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