Every machine in industry need lubrication to prevent power loss and component loss caused by fricton. Lubrication pump and grease mostly used.
Theseday, some reachers study on compound polymer resin with oil to make a gasket which can be sealed in machine and the release oil on rail it self.
Among the polymers, mostly studied resin for self-lubrication material is polyolefin. LDPE is one of the most important thermolastics applied widely in extrusion film and sheet, blow and injection moldings, wire and cable coation, pipe, and conduit but its use was restricted in certain applications by its low melting point, stability in hydrocarbons, and a tendency to crack when stressed. The crosslinked polyethylene, to mitigate these disadvantages, has been extensively studied for may years and has become a common in dustrial polymer in recent years.
Polyolefin elastomers( or POEs) are a relatively new class of polymers that emerged with recent advances in metallocene polymerization catalysts. Representing one of th fastest growing synthetic polymers, POE’s can be substituted for a number of generic polymers including ethylene propylene rubbers(EPR or EPDM), ethylene vinyl acetate (EVA), styrene-block copolymers (SBCs), and poly vinyl chloride (PVC). POEs are compatible with most olefin materials, are an excellent impact modifier for plastics, and offer unuque performance capabilities for compounded products. In less than a decade, POE’s have emerged as a leading material for automative exterior and interior applications, wire and cable, extruded and molded goods, film applications, medical good, adhesives, footwear, and foam.
In this study, we are trying to improve physical properties of LDPE, HDPE/paraffin oil compound by simple addition of varying content dicumyl peroxide(DCP) and POE in the intermal mixer.
In order to investigate the effect of DCP and POE content on released oil content from compound, magration test was comdusted the LDPE, HDPE/paraffin oil compound. The content of released oil from compound decreased with the addition of DCP and POE content. Crosslinking from DCP increased tensile strength and POE increased elasticty and viscosity in three-dimension structure inside compound.
Also, the differential scanning calorimetry was used to study the thermal properties of LDPE, HDPE/paraffin oil with different DCP and POE loadings. The result can be found values of Tm, Tc,△Tm, all decrease when DCP content is increased. It may be attributed to a distortion in the crystal structure resultion from the incrase in the crosslink density and acted as chain defect.
Physical properties were measured. POE content decreased tensile strength but elongation at break was quite increased. DCP was effect well by increase interfacil adhension.
Shore C hardness of compompounds were decreased with POE content, because POE is more flexible compared to olefin polymers.