Correlation between free-volume parameters and physical properties of polyethylene-nitrile rubber blend |
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Authors: | E Gomaa N Mostafa M Mohsen M Mohammed |
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Affiliation: | (1) Physics Department, Faculty of Science, Ain Shams University, Cairo, Egypt;(2) Petrochemical Department, Petroleum Research Institute, Nasser City, Cairo, Egypt |
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Abstract: | 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 (τ3 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 (τ3 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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Keywords: | free-volume distribution nitrile rubber polyethylene positron annihilation |
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