Formulating Nitrite Butadiene Rubber High Density Polyethylene Blends by Using Industrial Blends and Compatibilized Chloroprene Rubber

Formulating Nitrite Butadiene Rubber High Density Polyethylene Blends by Using Industrial Blends and Compatibilized Chloroprene Rubber

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The intent of existing investigation was to formulate nitrile butadiene rubber (NBR)/high density polyethylene blends (HDPE) blends using industrial waste (MW) and compatibilized by Chloroprene rubber (CR). Results indicated that the minimum and maximum torque increased with increasing HDPE amount in the blends, whereas scorch, and cure time showed the decreasing trend. Increment in HDPE increased the tensile strength, modulus, tear strength, hardness and crosslink density. % tensile strain, % compression set and abrasion loss of NBR/HDPE blends revealed the decreased trend with increasing HDPE level. MW filled blends based on CR provided the most encouraging balance values of overall properties.

Keywords: Blends; NBR; HDPE; mechanical properties; cure characteristics; Thermal Ageing

Introduction (15-12-2013)

Acrylonitrile-butadiene rubber (NBR) is well-known unsaturated copolymers for concerning five decays [1-2]. It has been used in many industrial required purposes as hoses, o-ring seals, insulation base product and other many packaging materials []. The main components of technically related NBR comprise of 24-30 wt% of acrylonitrile and include some benefits in contrast to other elastomer like polymers. Such as, good processability, resistance to oils as well as hydrocarbons, especially resistance to hydrocarbons and oils, NBR has wide region of service temperature (from -35 oC up to 100 oC) [1-2].
High density polyethylene (HDPE) is a semi-crystalline with outstanding chemical resistance as well as simple processability.Nitrile butadiene rubber (NBR) is a simply processable, tough, and flexible rubber.
The knowledge of thermoplastic elastomers (TP)from blends of NBR and HDPE has occurred as a valuable implement in tai...


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...ps and hence decreases the swelling percentage [16]. It was noticed that, the toluene immersion of NBR/HDPE blends compounds, the solvent molecules must enter in the NBR phase and depart more or less around the HDPE phase. The HDPE phase could escorted to very circuitous path for toluene molecules going through the NBR/HDPE blend.

The equilibrium swelling in toluene of the NBR/HDPE vulcanizates were determined in order to evaluate the extent of cross- linking. The Crosslink density values are also given in Table 4. One can see, as the equilibrium swelling values decrease, the degree of crosslinking increase. It is also clear that the accumulation of HDPE inplace to NBR obviously decreases the values of equilibrium swelling. In order to investigate the effect of HDPE on the crosslink density of the NBR/HDPE vulcanizates, considering the HDPE as additional filler.


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