✦ LIBER ✦

Study of water sorption in rubbers by acoustic microscopy

✍ Scribed by L Simonin; C Boukaftane; C Decker

Publisher: John Wiley and Sons
Year: 2000
Tongue: English
Weight: 264 KB
Volume: 49
Category: Article
ISSN: 0959-8103
DOI: 10.1002/1097-0126(200006)49:6<585::aid-pi423>3.0.co;2-x

No coin nor oath required. For personal study only.

✦ Synopsis

Acoustic microscopy has been used to examine changes during water swelling at the surface of a rubber previously treated with an acrylic monomer. Surface modi®cation was carried out with acrylic acid either in aqueous solution or in the vapour phase, and a photografting reaction was achieved with an aqueous solution of acrylic acid in the presence of a photo-initiator. Water sorption induces modi®cations of the mechanical properties, transforming a rigid polymer into a soft material. Therefore, the acoustic impedance of the material decreases during the swelling process and the evolution of acoustic re¯ection coef®cient is followed. The potential of ultrasonic measurements as an in situ and non-destructive dynamic analysis technique is demonstrated. Mapping of grafted and ungrafted areas on a rubber surface is obtained with acoustic microscopy.

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