Ethylene-octene copolymer(POE)can toughen polypropylene random(PPR).However,the type of POE and the octene concentration have a significant impact on the toughening effect of PPR.In this paper,three types of POE with different octene concentrations were blended with PPR.Through non-isothermal crystallization kinetics DSC analysis of PPR/POE blends,it was revealed that the ethylene segments in PPR and POE form a eutectic structure,leading to an increase in crystallization temperature.It can be inferred from the melt flow rate that POE with a high concentration of octene will increase the crystallization temperature of the PPR/POE blend.The reason may be that POE with a high octene concentration has strong fluidity and is more easily dispersed in the PPR/POE blend,thereby providing a better toughening effect on PPR.The mechanical property tests further confirm that the addition of POE can slightly reduce the strength of PPR,with POE containing lower octene concentration having a smaller impact on strength.Therefore,in practical applications,it is necessary to comprehensively consider the application of PPR in different directions and choose the appropriate POE.
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