Properties of water‐soluble acrylic copolymer/montmorillonite nanocomposites for warp sizing

Abstract

Acrylic copolymer/montmorillonite (MMT) nanocomposites for warp sizing were prepared in the presence of Na þ -MMT by the in situ intercalative polymerization of acrylic acid, acrylamide, and methyl acrylate in water solution. The properties of the solution and cast film were tested according to an application in sizing process of the nanocomposite size with various MMT contents. The results indicate that, for an exfoliated structure corresponding to the MMT content increasing to 7 wt %, the performance parameters of solution viscosity, glass-transition temperature, and tensile strength of the film increased and the moisture sorption, abrasion loss, and elongation at break of the film decreased. When the intercalated structure of MMT was 9 wt %, the gathered MMT layers acted as a common inorganic filler in the copolymer matrix, with limited contribution to the properties of the composite. The adhesion work of the nanocomposite solution was calculated by use of the Young-Dupre relation, which showed maximum values at an MMT content of 3 wt % on the surfaces of both the polyester and cellulose films.

A starch/milled‐montmorillonite nanocomposite for warp sizing

“…Hygroscopicity of the composite films was determined by equilibrium moisture adsorption of the films at 20°C for 1 wk at a series of RHs adjusted by different saturated salt solutions 4, 7. Each film sample was tested ten times and the average moisture sorption was calculated.…”

“…Different types of chemicals, such as modified starches 2, polyvinyl alcohol (PVA) 3, acrylates 4, and so on 5, are used as textile sizing agents. Among them modified starches are known to be the most effective type of size base materials 2, because of their renewability with low price and biodegradability 6, and modest film‐forming performance 7.…”

“…There is a significant potential for profitable applications of nanotechnology in textile warp size. Our previous study 4 demonstrated that there was some compatibility between the Na‐montmorillonite (Na‐MMT) layers and water‐soluble polymers or their monomers, so that the organized modification of MMT was not needed to prepare soluble nanocomposites. Some studies 14, 19 also reported starch/Na‐MMT nanocomposites prepared via melt intercalation processing.…”

Characterization of stabilized porous magnetite core-shell nanogel composites based on crosslinked acrylamide/sodium acrylate copolymers

“…Copolymers of AM and AA salts or substituted amides and AA salts are widely used to prepare inorganic polymer/layered nanocomposites . A water‐soluble acrylic copolymer/montmorillonite nanocomposite for warp sizing was synthesized by way of in situ intercalative polymerization of AA, AM and methyl acrylate in water with various contents of the clay . These copolymers showed good dispersion properties for metal and metal oxide nanoparticles …”

Effects of molecular structure and molar content of acrylate units on aerobic biodegradability of acrylate copolymeric sizing agents

“…The sizes are the copolymers of various acrylate monomers with a small amount of acrylic acid (AA), mainly manufactured through solution or emulsion polymerization. 2,3 The purpose of using AA in monomer formulation is to make the copolymers soluble or at least dispersible in water so as to facilitate size mixing and desizing. In the copolymerization process, the acrylate and AA monomers are converted into corresponding units (named acrylate and AA units, respectively) along the copolymeric chains of acrylate copolymers.…”