Tearing behavior and recyclability of nitrile rubber/poly(ethylene-co-vinyl acetate) blends

The tear strength of nitrile rubber/poly(ethylene-co-vinyl acetate) (NBR/EVA) blends was measured as a function of blend composition in an Instron universal testing machine. An increase in tear strength was observed with increasing EVA content. The variation in this property was correlated with the...

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Bibliographic Details
Published in:Materials letters 1995-08, Vol.24 (5), p.333-339
Main Authors: Varghese, Hima, Bhagawan, S.S., Prabhakaran, N., Thomas, Sabu
Format: Article
Language:English
Subjects:
Applied sciences
Blends
Exact sciences and technology
Forms of application and semi-finished materials
Polymer industry, paints, wood
Technology of polymers
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Summary:The tear strength of nitrile rubber/poly(ethylene-co-vinyl acetate) (NBR/EVA) blends was measured as a function of blend composition in an Instron universal testing machine. An increase in tear strength was observed with increasing EVA content. The variation in this property was correlated with the microstructural morphology of the system. The tear failure mechanism of these blends as a function of blend composition was studied by examining the failure surfaces and the fracture patterns correlated with the strength and failure of these materials. Various models such as parallel model, series model and the Halpin-Tsai equation were used to fit the experimental tear strength values. In order to analyze the reprocessability of these blends, the blends were recycled up to three times and the mechanical properties were measured. It was found that the properties of the blends were little affected by recycling.
ISSN:0167-577X
1873-4979
DOI:10.1016/0167-577X(95)00107-7