Volume 1, Issue 2
Study of Compatiblity Behaviour of Solution Blends of Nbr-Sbr Using Ultrasonic and Other Related Techniques
Author(s): Poonam Tiwari, Pratibha Singh, Vishal Verma, K. N. Pandey*, Vijai Kumar
Central Institute of Plastics Engineering and Technology, Lucknow, India
Abstract: The present investigations deal with the study of compatibility behavior of styrene -butadiene- rubber (SBR) and acryonitrile-co-butadiene (NBR) blends. Ultrasonic velocity, absolute viscosity and density measurements have been performed on solution blends of SBR and NBR in various blend ratios with and without addition of chlorinated polyethylene (CPE) as a compatibilizer. The ultrasonic velocity has been observed to deviate from linearity with variation in the blend ratio without the compatibilizer. The addition of compatibilizer, however, results in a marked increase of the ultrasonic velocity and it varies linearly with blend composition. The ultrasonic velocity and viscosity of the solution blends are significantly dependent of temperature and solid content of the blend solution. In order to understand the phase behavior of the blend with and without compatibilizer, morphological study has also been carried out using scanning electron microscope (SEM). Physico-mechanical properties like tensile strength and elongation at break and hardness of blends, NBR and SBR rubbers (50:50 blends) with and without compatibilizer has also been studied. Mechanical properties of blends with compatibilizer are more than that of without compatibilizer.
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