Studies in water-vapor transmission rate of nonocclusive acrylic adhesive tape

✍ Scribed by V. D. Athawale; S. C. Rathi

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 417 KB
• Volume: 59
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19960222)59:8<1243::aid-app6>3.0.co;2-c

✦ Synopsis

Various homopolymers, copolymers, and terpolymers based on 2-ethylhexyl acrylate (2-EHA), n-butyl methacrylate (nBMA), and acrylic acid (AA) were synthesized using the well-known free-radical polymerization technique. The polymers were analyzed by 'H-NMR and IR spectroscopy to identify and confirm the presence of the monomers in the copolymer and also to check the absence of monomer impurities. A water-vapor transmission rate (WVTR) study of the synthesized adhesives coated on nonwoven polyester fabric was undertaken using the desiccant method. The water-vapor permeability of the various copolymers changed with the change in monomer concentration. The higher the AA content in the copolymer, the higher was the permeability. The trend shown by various copolymers and terpolymers of 2-EHA with respect to their WVTR is 2-EHA-co-AA > 2-EHA-co-nBMA > 2-EHA-co-AA-co-nBMA.