Journal
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
Volume 13, Issue 5, Pages 583-587Publisher
SPRINGER
DOI: 10.1361/10599490420593
Keywords
free-volume distribution; nitrile rubber; polyethylene; positron annihilation
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Positron annihilation lifetime spectroscopy (PALS) was used to study the immiscibility of a polar nitrile rubber (NBR) that had been blended with pure and waste, low- and high-density polyethylene (PE). The effect of the weight percent of the rubber added to the PE was also investigated. It was found that a complicated variation (positive and negative) in both free-volume parameters (tau(3) and I-3) from the values of the initial polymers forms an immiscible blend. These results are supported by a significant broadening in the free-volume hole size distributions. This has been interpreted in terms of interfacial spaces created between the boundaries of the two phases. Furthermore, a correlation was established between the free-volume parameters (tau(3) and I-3) and the electrical and mechanical properties of the before mentioned polymer blends as a function of the weight percent of waste PE.
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