Poly(vinyl acetate)/poly(vinyl alcohol)/montmorillonite nanocomposite microspheres prepared by suspension polymerization and saponification

Jung, Hye Min; Lee, Eun Mi; Ji, Byung Chul; Deng, Yulin; Yun, Jae Deuk; Yeum, Jeong Hyun

doi:10.1007/s00396-006-1623-3

Cited by 47 publications

(48 citation statements)

References 17 publications

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“…Water or other organic molecules can enter into the layers of MMT, leading to its expansion through absorbing water, high dispersion, and adsorption, causing it to easily make mud, which can be activated, organized, and modified. The application of PVAc has been reported previously: PVAc MMT prepared by emulsion polymerization in the presence of poly(vinyl pyrrolidone) (PVP) 14,15 or in the presence of anionic surfactants, 16 preparation of PVAc MMT PVA, 17,18 preparation of PVAc MMT cross-linked by glycidyl methacrylate (GMA), 19,20 and preparation of PVAc MMT initiated by γ -ray radiation intercalation polymerization and the coblending of PVAc MMT with high-density polyethylene. 21,22 The previous studies on PVAc MMT suggest that other additives or agents as main components are necessary for the synthesis, such as PVP, PVA, GMA, and anionic surfactants as mentioned above.…”

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confidence: 99%

Preparation and characterization of exfoliated nanocomposite of polyvinyl acetate and organic montmorillonite

Cui¹,

Du²

2011

Adv Polym Technol

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ABSTRACT:To improve the chemical, physical, and mechanical properties of polyvinyl acetate (PVAc), an organic montmorillonite (OMMT) was first prepared by montmorillonite (MMT) and octadecyl trimethyl ammonium bromide (STAB), and then it was added to synthesized PVAc under conventional laboratory conditions. The influence of its variable addition on the properties of PVAc OMMT was investigated mainly by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), and static tension, and the rheology was also investigated by the power-law function equation and the Cross-Williamson model viscous equation. The exfoliated nanocomposite of PVAc OMMT was obtained; linear macromolecular chains of PVAc were formed in the layers of OMMT, and no chemical bonding appeared between OMMT and PVAc, but there were some physical effects. The dispersion of PVAc OMMT was better than PVAc. OMMT was exfoliated into layers or sheets of nanoparticles and was randomly dispersed in the matrix of PVAc. The particle diameter of OMMT ranged from 50 to 100 nm, whereas PVAc's diameter ranged from 250 to 500 nm; the smaller OMMT particles were adsorbed around the bigger all PVAc particles and formed a "strawberry" structure. PVAc and PVAc OMMT were both pseudoplastic non-Newtonian fluids; they possessed the normal stress effect (or the Weissenberg effect), that is the pole-climbing phenomenon. The static tension properties of PVAc OMMT were much better than PVAc, and the addition of OMMT in polymerization was reasonable and not more than 2

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confidence: 99%

Preparation and characterization of exfoliated nanocomposite of polyvinyl acetate and organic montmorillonite

Cui¹,

Du²

2011

Adv Polym Technol

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“…Recently, many researchers have reported the preparation and application of PVA NCs by adding clay to improve the properties of PVA such as optical and mechanical properties [13], gas-barrier properties [14] and environment-friendly biodegradable NC films [15,16].…”

Section: Introductionmentioning

confidence: 99%

Modification of Clay with L-Leucine and TiO2 with Silane Coupling Agent for Preparation of Poly(Vinyl Alcohol)/Organo-Nanoclay/Modified TiO2 Nanocomposites Film

Mallakpoura

Shahangia

2012

Designed Monomers and Polymers

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Poly(vinyl alcohol)/organo-nanoclay/modified-TiO 2 nanocomposites films were fabricated by dispersion of modified TiO 2 on the surface of organo-nanoclay in a poly(vinyl alcohol) matrix via an ultrasonic process followed by solution film casting. For this purpose surface-modified TiO 2 nano-particles were added into the poly(vinyl alcohol)/organo-modified Cloisite Na + nanocomposites matrix with 10 wt% organonanoclay. For the improvement of nanoparticles dispersion and increasing possible interactions between nano-particles and polymeric matrix, the surface of the nano-TiO 2 was modified with silane coupling agent (KH550). Also, the negative charge on the silica layer can play an important role in dispersing nanosized TiO 2 . Three nanocomposites with different loading of modified-TiO 2 (1, 3 and 6 wt%) were prepared and characterized by X-ray diffraction, Fourier transform infrared spectroscopy, field emission type scanning electron microscope, scanning electron microscopy, transmission electron microscopy, thermogravimetric analysis and UV-Vis transmission spectra. In morphological images it was observed that the OMMT was dispersed homogeneously in PVA matrix and modified TiO 2 nanoparticles are regularly dispersed on whole surface of organo-nanoclay layers. TGA results show that thermal stability of poly(vinyl alcohol)/organoclay/modified TiO 2 nanocomposites are enhanced compared with neat PVA.

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“…According to the well-known Armand's theory, ionic motion in polymersalt-complex is not due to charges hopping from site to site, but it is a continuous motion occurring in the amorphous region of the polymeric material [5]. Recently, attention of many researchers has also focused on synthesis of various polymer nanocomposites and nanofiber materials, as well as their metal, metal oxide, clay mineral, graphene and carbon nanotube incorporating compositions as excellent conductive nanomaterials [6][7][8][9][10][11].…”

Section: Vietnam Academy Of Science and Technologymentioning

confidence: 99%

Multifunctional electroactive electrospun nanofiber structures from water solution blends of PVA/ODA–MMT and poly(maleic acid-alt-acrylic acid): effects of Ag, organoclay, structural rearrangement and NaOH doping factors

Şimşek

Rzayev

Bunyatova

2016

Adv. Nat. Sci: Nanosci. Nanotechnol.

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Multifunctional electroactive electrospun nanofiber structures from water solution blends of PVA/ODA-MMT and poly(maleic acid-alt-acrylic acid): effects of Ag, organoclay, structural rearrangement and NaOH doping factors AbstractNovel multifunctional colloidal polymer nanofiber electrolytes were fabricated by green reactive electrospinning nanotechnology from various water solution/dispersed blends of poly (vinyl alcohol-co-vinyl acetate) (PVA)/octadecyl amine-montmorillonite (ODA-MMT) as matrix polymer nanocomposite and poly(maleic acid-alt-acrylic acid) (poly(MAc-alt-AA) and/or its Ag-carrying complex as partner copolymers. Polymer nanofiber electrolytes were characterized using FTIR, XRD, thermal (DSC, TGA-DTG), SEM, and electrical analysis methods. Effects of partner copolymers, organoclay, in situ generated silver nanoparticles (AgNPs), and annealing procedure on physical and chemical properties of polymer composite nanofibers were investigated. The electrical properties (resistance, conductivity, activation energy) of nanofibers with/without NaOH doping agent were also evaluated. This work presented a structural rearrangement of nanofiber mats by annealing via decarboxylation of anhydride units with the formation of new conjugated double bond sites onto partner copolymer main chains. It was also found that the semiconductor behaviors of nanofiber structures were essentially improved with increasing temperature and fraction of partner copolymers as well as presence of organoclay and AgNPs in nanofiber composite.

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Poly(vinyl acetate)/poly(vinyl alcohol)/montmorillonite nanocomposite microspheres prepared by suspension polymerization and saponification

Cited by 47 publications

References 17 publications

Preparation and characterization of exfoliated nanocomposite of polyvinyl acetate and organic montmorillonite

Preparation and characterization of exfoliated nanocomposite of polyvinyl acetate and organic montmorillonite

Modification of Clay with L-Leucine and TiO2 with Silane Coupling Agent for Preparation of Poly(Vinyl Alcohol)/Organo-Nanoclay/Modified TiO2 Nanocomposites Film

Multifunctional electroactive electrospun nanofiber structures from water solution blends of PVA/ODA–MMT and poly(maleic acid-alt-acrylic acid): effects of Ag, organoclay, structural rearrangement and NaOH doping factors

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