Influence of particle surface properties on film formation from precipitated calcium carbonate/latex blends

Abstract

ABSTRACT:The surface properties of films prepared from a blend of precipitated calcium carbonate pigment (PCC) and poly(n-butyl methacrylate-co-n-butyl acrylate) [P(BMA/BA); T g ϭ 0°C] latex were investigated in terms of the surface characteristics of the PCC and P(BMA/BA) latex particles. It was found that the presence of carboxyl groups on the P(BMA/BA) latex particles significantly improved the uniformity of the distribution of the PCC particles within the P(BMA/BA) copolymer matrix and the gloss of the resulting films. This phenomenon could be explained by an acid-base reaction between the PCC particles and the carboxylated P(BMA/BA) latex particles. Studies on the influence of the composition of PCC/P(BMA/BA) latex blends on the gloss and transparency of the films were also performed, which led to the determination of the critical pigment volume concentration (CPVC) of this system, which was found to be 42 vol %.

Aqueous latex/ceramic nanoparticle dispersions: colloidal stability and coating properties

“…The contact resistance between the conductive fillers is increased by the encapsulation of these fillers with a layer of insulating polymer [73]. It is reasonable that the ITO and ATO nanoparticles interact differently with the insulating matrix polymer during coating formation [20] because they may have different surface chemistry [38][39][40][41][42][43]60,61], leading to a different polymer distribution among the ATO and ITO nanoparticles. Such a difference distribution may also influence the percolation threshold.…”

“…Examples include architectural [1,2], paper [3,4], biological [5][6][7], and electrical and optical coatings [8][9][10][11], as well as other industrial paints and coatings [12][13][14][15][16][17][18][19][20]. These water-borne systems are environmentally friendly and easily processed.…”

Poly(sodium 4-styrenesulfonate) modified carbon nanoparticles by a thermo-mechanical technique and its reinforcement in natural rubber latex

“…Various kind of small particles, such as carbon blacks, but also clays [17][18][19], calcium carbonates [20], silicon dioxide [21][22][23][24][25] and magnesium hydroxide, etc. have already been used to reinforce latex in the past 50 years.…”

“…Systematic study of the techniques have been found in the literature: (a) to apply two-step milling process for producing rubber/filler composite; (b) to introduce the dispersants or coupling agents [11][12][13]; (c) to pre-treat carbon surface or chemically modify elastomer chains, in order to enhance the physical and chemical interaction at the interface of polymer-filler [14][15][16]; (d) to disperse CBs into rubber latex or solution instead of solid mixing [17][18][19][20][21][22][23][24][25]. No significant improvement was observed in the reinforcing activity of carbon black treated by (a), (b) and (c).…”

Polyurethane latex/water dispersible boehmite alumina nanocomposites: Thermal, mechanical and dielectrical properties

“…Coagulating rubber latex and aqueous dispersion of clay is proven to be a simple technique for obtaining films of high strength and tear resistance [10][11][12][13][14][15][16]. Calcium carbonate particles have also been used to improve the mechanical performance of latex products [17][18][19]. On the other hand, carbon black has received less attention as reinforcing filler [20], opposed to silica grades [21][22][23][24][25], due to its hydrophobicity.…”