In Situ synthesis of poly(styrene-butylacrylate-acrylic acid) latex/barium sulfate nanocomposite and evaluation of their film properties

Abstract

Barium sulfate nanocrystals of average 40 nm sizes were prepared by the micellar solution spray process. The influences of atomized impingement flow on nanoparticle formation and stabilization were inspected on the basis of Fourier transform infrared (FTIR), X-ray diffraction, and transmission electron microscopy analysis. Poly(styrenebutylacrylate-acrylic acid) (PSBA) nanocomposites were synthesized by in situ copolymerization in the presence of 0.5-2.5% BaSO 4 nanoparticles. FTIR and atomic force microscopy analysis confirmed the uniform dispersion of 2% or less nano-BaSO 4 within the PSBA matrix. The strength of interfacial adhesion between the nanoparticle and copolymer was examined on the basis of hydroscopicity, differential scanning calorimetry, thermogravimetric analysis, and universal testing machine analysis of nanocomposite film. The glass transition and thermal decomposition temperatures of PSBA latex were shifted toward higher temperatures by the restriction of nanoBaSO 4 on its segmental and long-range chain mobility. The well-dispersed nano-BaSO 4 , with a larger fraction of immobilized copolymer on the pigment surface, improves the scratch and abrasion resistance, decreases the water uptake, and increases the tensile strength and elongation at break of the latex film within the specific loading. Thus, fabricating the PSBA/BaSO 4 nanocomposite presents an effective approach for development of latex coatings with enhanced performance. POLYM. COMPOS., 34:1670-1681,

Synthesis of nano CaCO3/acrylic co‐polymer latex composites for interior decorative paints

“…The composition of the copolymers formed under monomer‐starved conditions approximately equals the composition of the monomer feed, regardless of the relative reactivity of the various monomers. In the aqueous environment, APS initiator forms radicals from the still available residual monomers and these radicals start the polymerization process after diffusion into the micelle . Due to the large surface area of nanoCaCO 3 , higher interface energies is resulted between nanoparticles and polymer matrix.…”

“…The water uptake analysis of virgin acrylic copolymer latex and CaCO 3 /acrylic co‐polymer latex nanocomposites films were performed using Static Immersion Test as described earlier by Kulkarni et al . The results are shown in Fig.…”

“…Acrylic nanocomposites containing dispersed SiO 2 and montmorillonite nanoparticles with improved mechanical, thermal, and weather resistance properties are reported . Kulkarni et al have prepared poly (styrene–butylacrylate–acrylic acid) latex/BaSO 4 nanocomposites with enhanced thermomechanical characteristics by in situ emulsion polymerization. Thus unique combinations of acrylic polymer matrices filled with inorganic nanomaterials at uniform dispersion furnish high performance due to significant transfer of mechanical stress to the fillers in coatings .…”

“…Initially spherical CaCO 3 nanoparticles with average size of 25–90 nm were synthesized by conducting non‐ionic surfactant Tween‐80 mediated coprecipitation in patented solution spray reactor . Same solution spray process was previously used for synthesis of barium sulfate , prussian blue, iron oxide , calcium carbonate and lead chrome nanomaterials . In order to improve the compatibility/interfacial interactions between nanofillers and acrylate monomer as well as assimilation between the CaCO 3 nanoparticles and the polymer matrix, surface modification of CaCO 3 nanoparticles was carried out using silane coupling agent.…”

Interfacial analysis and reaction engineering of sucrose ester mediated solution spray synthesis of lead chromate nanorods

“…1), employed in present investigations, has been reported in the synthesis of iron oxide, prussian blue [15,16], BaSO 4 [17], CaCO 3 [18] and lead chrome [19,20] nanomaterials. In general, the yields of lead chromate nanopigments in solution spray reactor were observed to be in the range of 84-87% (Table 1A), far higher than those reported generally using microemulsion, matrix mediation and sol-gel techniques for synthesis of nanomaterials.…”