![]() The values of the cutting strength were about two orders of magnitude smaller than the results obtained from tear measurements by reducing the crystalline yielding effect, owing to the confinement of the crack tip. Tear strength generally decreased with increasing test temperatures and peroxide level. Tensile strength decreased at first with increasing levels of peroxide concentrations, yet leveled off at higher levels of peroxide concentrations at all test temperatures. Crystallinity remained largely unchanged for the PP, indicating the dominant role of the cured mPE domains on changes in the mechanical properties for the vulcanizates. The mixing of mPE (40 wt%) and PP (60 wt%) containing a fixed amount of paraffin oil and various dosages of peroxide was performed to prepare the dynamic vulcanized blends using an internal mixer. A peroxide cured polypropylene (PP)/metallocene polyethylene (mPE) blend to form a thermoplastic vulcanizate has been prepared. ![]()
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