Maleic anhydride based copolymer dispersions for surface modification of polar substrates

Abstract

In this article, we report the modification of poly(styrene‐alt‐maleic anhydride) (PSMA) with monofunctional amine‐terminated poly(dimethyl siloxane) (PDMS–NH2) by thermal imidization, followed by the preparation and characterization of a surfactant‐free artificial latex thereof and application of this latex onto cotton fabric. The imidization reaction was monitored by NMR and attenuated total reflection Fourier transform infrared (ATR–FTIR) spectroscopy. 1,2‐Cyclohexyldicarboxylic anhydride was chosen as a model compound for the PSMA copolymer; this allowed a more detailed characterization by NMR and ATR–FTIR spectroscopy. After the PSMA/PDMS–NH2 imidization reached completion, a fraction of the anhydrides were ammonolyzed. In this way, a self‐emulsifying latex with an average particle diameter of approximately 145 nm and a ζ potential of −56 mV was obtained. It was found that the PDMS‐modified PSMA latex in which 30 mol% of the initial amount of anhydride groups were previously imidized by using PDMS‐NH2 and a fraction of the anhydrides were ammonolyzed with 0.3 eq. of NH3 (PSMA30) was stable in the pH range 4–10. The water contact angle values of the latex‐coated cotton textile fabric indicated a hydrophobized surface, with a static contact angle of 135.7°± 1.2°. The washing studies with a standard soap solution of the cotton samples with or without crosslinker showed that the crosslinked PSMA30 offered a good coating durability to the cotton. This waterborne resin based on surfactant‐free latices displayed promising properties for coating applications and seemed to be very suitable for the hydrophobization of polar surfaces. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012

Surface Chemistry of Oil-Filled Organic Nanoparticle Coated Papers Analyzed Using Micro-Raman Mapping

“…where some interesting groups of bands are detected: (1) the bands corresponding to the organic coating moieties with imide and styrene are clustered in PC-1; (2) the bands corresponding to the paper substrate with cellulose fibers are grouped in PC-2; and (3) the bands corresponding to the oil are separated in PC-3. Therefore, the different PCs can be used for detecting the specific components in the present paper coating system.…”

“…The maleic anhydride copolymers may be considered as a broad class of polymers that exist from aqueous dispersion and can provide different chemical functionalities. 1 Nanoparticle (NP) pigments were introduced to provide specific surface properties such as hydrophobicity, magnetism, gloss, whiteness, conductivity, antibacterial properties, and photocatalytic properties. 2 In parallel with the development of such NP coatings, the variations in local surface chemistry of coated papers should be evaluated with dedicated analytical techniques.…”