Metallocene polypropylene(mPP)has advantages such as high crystallinity,small microcrystalline size,narrow molecular weight distribution,and easy control of melt flow rate,making it a high-quality raw material for melt blown non-woven fabrics.The results show that the addition of polybutene elastomer(PBt-TPE)to mPP can reduce its crystallinity and its microcrystalline size,and can also reduce its melt viscosity and improve its flexibility.PBt-TPE can also reduce the chemical degradation rate of mPP,and correspondingly regulate the degradation process of mPP/PBt-TPE blend,which can obtain mPP/PBt-TPE composites with narrower molecular weight distribution.Poly(ethylene-propylene)elastomers(POE)can promote the degradation reaction of mPP/PBt-TPE blend to a certain extent,obtaining lower molecular weight and narrower molecular weight distribution mPP/PBt-TPE composite,further improving the melt blown processing performance of composite materials.
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