STUDIES ON HIGH HEAT RESISTANT ACRYLIC ADHESIVE

Abstract

Acrylic copolymer was prepared by solution polymerisation technique using water as a solvent. The Cloisite 30B/Acrylic Copolymer nanocomposites with different loading of nanoclay (0.5-3.0%) were prepared by In-situ method. For compositional analysis fourier transform infrared spectroscopy (FTIR), Proton nuclear magnetic resonance (1H NMR) and Isothermal thermal gravimetric analysis have been studied and results show that a suitable copolymer has been formed with four monomers that are acrylic acid, methacrylic acid, butyl acrylate, methyl methacrylate. Different parameters like solid content, solubility, appearance, acid value and pH values were checked for each nanofilled copolymer. Rheology was tested for pure and 0.5% filled copolymer and increase in viscosity with shear thickening behaviour at high shear rate was observed. All compositions were checked for thermal stability by thermal gravimetric analysis (TGA) analysis and found that 50 % wt. at 398 °C for 2.0% filled Cloisite 30B/ Acrylic nanocomposite. Epoxy resin was added as tackifier with curing agent with acrylic system. Peel strength was checked for two substrate: corona treated metallised biaxially-oriented polypropylene (bopp) and nylon cloth. Peel strength was increasing with nanofiller loading upto 2.0%.