Synthesis of Water-Soluble Polyacrylics Modified Silica Sol-Gel Materials

Wei, Yen; Wang, Wei; Yang, Dachuan; Tang, Liguang

doi:10.1021/cm00046a028

Cited by 30 publications

(21 citation statements)

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“…Hybrid materials of polyacrylates,16 polymethacrylates,13 polyacrylonitrile,16 poly(vinyl acetate) 14. polystyrene,12 maleimide–styrene copolymers,17 polycarbonate,18 epoxy resins,19 and polyimides15 have been studied.…”

Section: Introductionmentioning

confidence: 99%

Influences of some polymerization conditions on particle properties of suspension poly(vinyl chloride) resin

Bao

Brooks

2002

J of Applied Polymer Sci

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Effects of polymerization temperature, conversions, and nonionic surfactant on the particle properties of suspension poly(vinyl chloride) (PVC) resins were investigated. It was shown that polymerization temperature has no significant influences on the mean particle size of PVC resin, and that the cold plasticiser absorption (CPA) of resin decreases linearly with the increase of polymerization temperature. Agglomeration of VCM droplets finishes before 20% conversion, and the mean particle size keeps almost constant at later stages of the polymerization process, but the CPA continues decreasing with the increase of conversion. Scanning Electron Microscopy (SEM) micrographs show that the degree of agglomeration of primary particles increases with polymerization temperature and conversion. Addition of nonionic surfactant to the VCM suspension system, as a secondary suspending agent, has a great influence on the particle properties of PVC resin. The particle size and CPA increase as the concentration of nonionic surfactant increases. The nonionic surfactant with a greater HLB value is more effective in raising the mean particle size, but is less effective in raising the CPA. It is considered that the added nonionic surfactant would be absorbed faster on the VCM/water interface than the poly(vinyl alcohol) (PVA), which was used as the primary suspending agent. Because the colloid protection ability of the nonionic surfactant is less than that of PVA, droplets become less resistant to coalescence, and the mean particle size of the final PVC resin increases consequently. The increase of porosity is caused by the combined effects of increased coalescence of VCM droplets and the nonionic surfactant's steric effect inside the droplets.

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Section: Introductionmentioning

confidence: 99%

Influences of some polymerization conditions on particle properties of suspension poly(vinyl chloride) resin

Bao

Brooks

2002

J of Applied Polymer Sci

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“…11 composites (curves a to d) shifted only to a slightly higher values (compared with pure ABS) with increasing silica content. Curves e to g were the DSC results of ABSOSi(OCH 3 ) 3 /SiO 2 composites.…”

Section: Dsc Analysis Of the Compositesmentioning

confidence: 93%

Organic-inorganic composite materials from acrylonitrile-butadiene-styrene copolymers (ABS) and silica through anin situ sol-gel process

Hsu

Lin

2000

J. Appl. Polym. Sci.

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Nonbonded and chemically bonded organic-inorganic composite materials, ABS/SiO 2 and ABSOSi(OCH 3 ) 3 /SiO 2 , were prepared by the sol-gel processing of tetraethoxysilane (TEOS) in the presence of ABS and trimethoxysilyl functionalized ABS, ABSOSi(OCH 3 ) 3 , under the catalization of NH 4 F. The ABSOSi(OCH 3 ) 3 was obtained by oxidizing the cyano group in ABS with hydrogen peroxide, then subsequently underwent ring-opening reaction with 3-glycidoxypropyltrimethoxysilane (GPTS). The ABSOSi(OCH 3 ) 3 /TEOS sol-gel liquid solution system, in which the ABS chains formed the covalent bonds with silica network and helped fix the polymer chains in the silica network, had a shorter gelation time than that of the ABS/TEOS system, which linked ABS chains to the silica network only by hydrogen bonding the cyano groups in ABS to the silanol groups. The morphology and properties of composite were characterized by scanning electron microscopy (SEM), differential scanning calorimeter (DSC), tensile tests, and thermogravimetry. It was found that the composite prepared from ABSOSi(OCH 3 ) 3 had higher tensile strength, glass transition point (T g ), thermal stability, and more homogeneous morphology because of the existence of the covalent bond between ABS chains and silica network that increased the compatibility between the organic and inorganic phases.

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“…A large number of works [3][4][5][6] have been devoted to the sol-gel synthesis of hybrid organic-inorganic materials with the use of metal alcoholates in the presence of water-soluble polymers, such as poly(vinyl alcohol), poly(acrylamides), poly(methacrylic acid), poly(acrylic acid), etc. Many physicochemical properties of hybrid materials can be varied by choosing the corresponding organic compounds and their amounts in the inorganic matrix with the formation of hybrids having different structures.…”

Section: Introductionmentioning

confidence: 99%

Investigation into the influence of organic modifiers and ultradispersed hybrid fillers on the structure and properties of glass-ceramic coatings prepared by the sol-gel method

et al. 2006

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Glass-ceramic coatings on nickel and its alloys are produced from organic-inorganic hybrids by the sol-gel method. The coatings are applied using sol-gel systems composed of tetraethoxysilane (inorganic dopant), as well as of finely dispersed oxide and ultradispersed hybrid fillers. Acrylic and methacrylic acid derivatives are taken as organic modifiers. Oligocarbonate dimethacrylate-substituted tetranuclear titanium oxide clusters are used as the ultradispersed hybrid filler. The influence of the organic modifiers and ultradispersed hybrid fillers on the physicochemical processes occurring in the sol-gel systems and on the electrical parameters of the coatings are experimentally studied, and the data obtained are analyzed.

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Synthesis of Water-Soluble Polyacrylics Modified Silica Sol-Gel Materials

Cited by 30 publications

References 1 publication

Influences of some polymerization conditions on particle properties of suspension poly(vinyl chloride) resin

Influences of some polymerization conditions on particle properties of suspension poly(vinyl chloride) resin

Organic-inorganic composite materials from acrylonitrile-butadiene-styrene copolymers (ABS) and silica through anin situ sol-gel process

Investigation into the influence of organic modifiers and ultradispersed hybrid fillers on the structure and properties of glass-ceramic coatings prepared by the sol-gel method

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