Synthesis of new rhodamine dyed copolymer nanodispersions for textiles-agglomeration and control with copolymer resins

• Rhodamine/styrene/acrylonitirle/2-hydroxyethyl methacrylate nanoparticles synthesis.
• Spherical in shape particles formation and improved fastness properties in textiles.
• Styrene-maleic anhydride resins control particle agglomeration at neutral pH.
• Stabilized nanodispersions with styrene-maleic anhydride resins.
• Improved fastness properties with styrene-maleic anhydride resins.

Aqueous dispersions containing rhodamine dyed acrylonitrile/styrene/2-hydroxyethyl methacrylate copolymer nanoparticles synthesized through microemulsion polymerization process, were analyzed by Fourier Transform Infrared Spectroscopy, Malvern Particle Size Analyzer, Ultraviolet–Visible Spectroscopy and Segmental Electronic Spectroscopy to evaluate the structural and morphological influence on particle’s agglomeration. Molar absorptivities were found to be decreasing relatively more in combination of the dyes as they were more prone to undergo molecular aggregation. During polymerization, agglomeration of the particles leading to form coagulum was found to be increasing linearly with increasing monomers amount, molar absorptivities and pH. The dispersions treated thermally with Styrene Maleic Anhydride resins at neutral pH exhibited well controlled agglomeration of the particles and the printed fabrics exhibited increased strength. The fabrics after exposed under Q-Sun Xenon Chamber were evaluated by Premier Colour Scan Spectrophotometer showed improved colour fastness. Segmental Electronic Spectroscopy of these dispersions showed uniform spherical shape particles.