An ultrasonic case study for assessing the effects of natural curing on the blowing process in industrial rubbers (original) (raw)

Materials evaluation, 2003

Abstract

Use of the ultrasonic technique has been found to be adequately effective for online detection of blowing in industrial rubbers. The blowing process (which forms numerous bubbles) is influenced by several factors including the temperature maintained during blowing, the types of chemicals being used as blowing agents and the degree of natural curing present in rubbers. In the present work, the effect of natural curing of the rubbers on the blowing process is investigated. Using a previously devised ultrasonic detection procedure, investigation is conducted on blowing rubber samples having different degrees of natural curing. The results show that the time domain ultrasonic response is definitely dependent on the extent of curing present in the rubber samples. Certain parameters are also identified from the ultrasonic response that could be used for assessing the extent of curing.

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