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Properties of High-fluid Polypropylene Modified withMetallocene Polyethylene


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Properties of High-fluid Polypropylene Modified withMetallocene Polyethylene
JIA Hong-bingJIANG QiWANG Jing-yiFANG Er-yuanJIANG Jing
School of Chemical Engineering,NUST,Nanjing 210094,China
high fluid polyropylene metallocene polyethylene melting and crystallizationtemperaturemechanical property
TQ325. 1
To improve the properties of the high-fluid polypropylene( HF-PP), it is modified withmetallocene ethylene-hexene copolymer(mEHC). The mEHC/ HF-PP composites are prepared throughmechanical blending and characterized by the molten index tester,the differential scanning calorimeter(DSC)and the scanning electron microscope(SEM). The results show that PP matrix has good handfulprocessability. DSC analysis indicates that the mEHC has no influence on the crystal structure of thePP matrix,but increases crystallization temperature of the PE component in the copolymer. mEHC haspartial miscibility with the HF-PP molecule. The impact strength and break elongation of HF-PP areimproved significantly. When mEHC mass content is 30%,the impact strength at room temperatureincreases to 17.81 kJ/ m2. SEM micrographs show that the sea-island structure can be observed whenmEHC elastomer particles are uniform on the PP continous phase surface.


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Last Update: 2012-11-26