Towards the synthesis of high solids content waterborne poly(methyl methacrylate-co-butyl acrylate)/montmorillonite nanocomposites

Diaconu, Gabriela; Paulis, Marı́a; Leiza, José R.

doi:10.1016/j.polymer.2008.03.038

Cited by 68 publications

(41 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Around T g and higher, the material becomes soft, and the clay strengthening effect is prominent due to the restricted movement of the polymer chains surrounding the clay platelets. 27 Therefore, the thermally induced loss of modulus for the sample S5 will be less than that of S1. The overall reinforcement of the nanocomposite benefits from the potential bonds between the polymer and the bentonite layers.…”

Section: Dynamic Mechanical Thermal Analysis Studymentioning

confidence: 98%

Nanocomposite super‐swelling hydrogels with nanorod bentonite

Darvishi

Kabiri

Zohuriaan‐Mehr

et al. 2011

J of Applied Polymer Sci

View full text Add to dashboard Cite

A modified bentonite (nanorod bentonite) was obtained from conventional bentonite by an ultrasonic treatment. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) images indicated that modified bentonite comprised rod-shape morphology without any change in the chemical structure confirmed by Fourier transform infrared (FTIR) spectroscopy and Xray diffraction (XRD) patterns. Novel super-swelling hydrogels with nanocomposite structure were then prepared via solution polymerization of 2-acrylamido-2-methylpropane sulfonic acid (AMPS) and (N-[3-(dimethylamino)propyl] methacrylamide) (DMAPMA) in the presence of the nanobentonite and a crosslinker. The DMAPMA consisted of either intercalant or monomer in the polymerization. The hydrogel products were characterized by FTIR, swelling studies, dynamic mechanical thermal analysis (DMTA), XRD, and rheological measurements. It was proposed that exfoliated and intercalated morphology were obtained at low and high-nanobentonite contents, respectively. DMTA indicated that mechanical properties of the dried gel were improved with raising the clay content. In the water-swollen state, storage modulus was considerably increased in nanocomposites having <8% of modified bentonite, and then it was decreased at the higher clay content due to interfering effect of the clay in polymerization progression.

show abstract

Section: Dynamic Mechanical Thermal Analysis Studymentioning

confidence: 98%

Nanocomposite super‐swelling hydrogels with nanorod bentonite

Darvishi

Kabiri

Zohuriaan‐Mehr

et al. 2011

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…Other inorganic-organic hybrids include clay acrylic dispersions 105 for instance to obtain oxygen and moisture 106 barrier properties and for increased stiffness and rheology modification. 105 The increased storage and tensile moduli are attributed to the local restrictions on the matrix mobility in the vicinity of the rigid nanosized clay particles.…”

Section: Waterborne Inorganic Organic Hybridsmentioning

confidence: 99%

Polymer heterogeneity in waterborne coatings

Overbeek

2009

J Coat Technol Res

View full text Add to dashboard Cite

An overview is presented of the progress in understanding polymer heterogeneity over the last 20 years and how this has contributed to the improvement of coatings. Solvent-based polymers are homogeneous in nature, since all polymeric materials tend to be dissolved in the same solvent mixture. This is different for most waterborne polymers, which tend to be present in a compartmentalized way. Most polymeric materials are present in particles, which are separated by the continuous aqueous phase. This gives excellent opportunities to create particle morphologies that form the basis for the film morphology after drying of the coating. This article gives an overview of the various types of heterogeneity which are accessible in waterborne polymers and will show how heterogeneity in the polymer can contribute to the solution of several persistent problems of the coating industry.

show abstract

“…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. The use of colloidal dispersions offers another broad range of applications for nanocomposite technology within the realm of coatings and paints [27]. Different groups [28][29][30][31][32][33][34], have used solid particles or in this case clay nanoparticles as stabilizers in emulsions in order to substitute surfactants.…”

Section: Introductionmentioning

confidence: 99%

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

Mrah

Méghabar

Belbachir

2015

Bull. Chem. React. Eng. Catal.

View full text Add to dashboard Cite

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.

show abstract

Towards the synthesis of high solids content waterborne poly(methyl methacrylate-co-butyl acrylate)/montmorillonite nanocomposites

Cited by 68 publications

References 45 publications

Nanocomposite super‐swelling hydrogels with nanorod bentonite

Nanocomposite super‐swelling hydrogels with nanorod bentonite

Polymer heterogeneity in waterborne coatings

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

Contact Info

Product

Resources

About