Macroinitiator and Macromonomer Modified Montmorillonite for the Synthesis of Acrylic/MMT Nanocomposite Latexes

Diaconu, Gabriela; Mičušík, Matej; Bonnefond, Audrey; Paulis, Marı́a; Leiza, José R.

doi:10.1021/ma802467j

Cited by 70 publications

(50 citation statements)

References 59 publications

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“…They also prepared stable and coagulum-free polyacrylate/clay latexes with commercial organically modified clay using miniemulsion polymerization [119]. And subsequently, the clay was modified by cationic macromonomer (2-methacryloylethylhexadecyldimethylammonium bromide (MA16)) and cationic macroinitiator (acrylic oligomer end-capped with a nitroxide), separately, to bear reactive groups [120]. Then these hydrophobized reactive clays were used directly in miniemulsion polymerization to form stable and coagulumfree polyacrylate/clay nanocomposites latex with partially exfoliated structures (seen in Fig.…”

Section: Polyacrylate/clay Nanocomposite Latexmentioning

confidence: 99%

Recent advances in the modification of polyacrylate latexes

Bao

Zhang

et al. 2015

J Mater Sci

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Polyacrylate latexes present good film-forming property, and therefore are used in a wide range of applications including coatings, adhesives, additives for paper, textiles, wood, and leather. However, some drawbacks, such as poor elasticity and low hardness have restricted their applications. This review summarizes recent development of polyacrylate latexes modified by polyurethane, organic fluorine, and inorganic nanoparticles, separately, which most often exhibit superior properties to those of their individual components. For each modification method, a comment is given based on our knowledge and related research experience. At last, some perspectives on the future research and development of modification of polyacrylate latexes are concluded.

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Section: Polyacrylate/clay Nanocomposite Latexmentioning

confidence: 99%

Recent advances in the modification of polyacrylate latexes

Bao

Zhang

et al. 2015

J Mater Sci

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“…The precipitated clay was dispersed in THF (25 mL) and subsequently 0.3 g of LiBr was added to the solution. The mixture was stirred at room temperature at 700 rpm for 72 h and then was ultracentrifuged at 10,000 rpm for 30 min to separate attached chains afterwards [24]. The supernatant was also passed through a column of alumina to remove the transitional metal catalyst.…”

Section: Separation Of Clay-attached and Free Polymer Chainsmentioning

confidence: 99%

Use of clay-anchored reactive modifier for the synthesis of poly (styrene-co-butyl acrylate)/clay nanocomposite via in situ AGET ATRP

et al. 2011

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Atom transfer radical polymerization using activators generated by electron transfer (AGET ATRP) was employed to synthesize well-defined poly (styrene-co-butyl acrylate)/clay nanocomposites. Dodecyltrimethylammonium bromide (DDTMAB) and Vinylbenzyltrimethylammonium chloride (VBTMAC) surfactants were used as clay modifier. The classical surfactant is used to expand the interlayer gallery of montmorillonite; however, double bond of reactive modifier participates in chain propagation process and forms clayattached polymer chains. Subsequently synthesis of attached and free poly (styrene-co-butyl acrylate) chains and their composition was confirmed by Fourier-transform infrared spectroscopy (FTIR) and proton nuclear magnetic resonance spectroscopy ( 1 H NMR). Narrow distribution of nanocomposites molecular weight was confirmed by gel permeation chromatography (GPC). Partially exfoliated clay layers in the copolymer matrix were revealed by X-ray diffraction (XRD) and transmission electron microscopy (TEM). Thermal properties of the nanocomposites were evaluated by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). Thermal decomposition of the nanocomposites was hindered in the presence of nanoclay. Dynamic mechanical thermal analysis (DMTA) results show that addition of nanoclay was also resulted in enhanced storage modulus (E′) in comparison with the neat copolymer. Lower glass transition temperature of nanocomposites was displayed by DSC.

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“…The morphology of the nanocomposites has a direct effect on the mechanical, thermal and barrier properties [21,22]. Recently, another method used to obtain polymer/clay nanocom-posites has been emulsion polymerization [23][24][25][26]. Emulsion polymerization offers a cleaner and "greener" alternative to the solvents used in in-situ polymerization and furthermore limits to the thermal degradation of the clay platelets that occurs in melt processing.…”

Section: Introductionmentioning

confidence: 99%

In-situ Polymerization of Styrene to Produce Polystyrene / Montmorillonite Nanocomposites

Mrah

Méghabar

Belbachir

2015

Bull. Chem. React. Eng. Catal.

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A reactive cationic surfactant cetyltrimethylammonium bromide (CTAB) was synthesized for intercalation of montmorillonite Mmt, a Maghnite type of clay. The pristine montmorillonite (Mmt) was obtained from Algerian plant with a cation exchange, Organophilic Mmt, was prepared by ion exchange between Na + ions in the clay. CTAB-intercalated Mmt particles were easily dispersed and swollen in styrene monomer, PS/Mmt-CTAB nanocomposites were synthesized via in-situ polymerization, in-situ polymerization, this method is based on the swelling of the silicate layers with the liquid polymer. The polymer composites were characterized using different techniques such as X-ray diffraction (XRD), The results were showed that, the basal space of the silicate layer increased, as determined by XRD, from 12.79 to 32.603 Å. Transmission electron microscopy (TEM) indicated that exfoliation of Mmt was achieved. In this current research, thermal gravimetric analysis (TGA) and force atomic microscopy (AFM) were also studied.

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Macroinitiator and Macromonomer Modified Montmorillonite for the Synthesis of Acrylic/MMT Nanocomposite Latexes

Cited by 70 publications

References 59 publications

Recent advances in the modification of polyacrylate latexes

Recent advances in the modification of polyacrylate latexes

Use of clay-anchored reactive modifier for the synthesis of poly (styrene-co-butyl acrylate)/clay nanocomposite via in situ AGET ATRP

In-situ Polymerization of Styrene to Produce Polystyrene / Montmorillonite Nanocomposites

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