Abstract
The mechanical, morphological and thermo-oxidative aging properties of the glass fiber reinforced polypropylene (RGF-PP) were studied based on four different maleic anhydride grafted polypropylene (PP-g-MAH) compatibilizers with different content of residual maleic anhydride (MAH). It was shown that PP-g-MAH compatibilizer could significantly improve the mechanical properties of RGF-PP, while from thermal and morphological analysis results, the content of residual MAH had negative influence on long term thermo- oxidative aging properties of RGF-PP with adding PP-g-MAH compatibilizer; the lower the residual content of MAH is, the better the thermo stability of the PP-g-MAH is, and also the better the thermo-oxidative aging properties was obtained.
Highlights
Polypropylene (PP) has advantages of low density, cheap price, good processing property and chemical resistance as a general-purpose of plastics so that it is widely applied in the field of household appliances, automobiles, packaging and construction
Various disadvantages of it such as low mechanical property, high molding shrinkage, low impact strength near Tg and low distortion temperature limited the use of PP [1]
The parts used in engines need to work for a long time at 100 ̊C, which means that the RGF-PP has to possess better thermo-oxidative aging properties
Summary
Polypropylene (PP) has advantages of low density, cheap price, good processing property and chemical resistance as a general-purpose of plastics so that it is widely applied in the field of household appliances, automobiles, packaging and construction. The parts used in engines need to work for a long time at 100 ̊C, which means that the RGF-PP has to possess better thermo-oxidative aging properties. In order to improve the interfacial bonding strength between PP and glass fiber or other minerals, maleic anhydride grafted polypropylene (PP-g-MAH) is often used as a compatibilizer [4] [5] [6] [7] [8]. Residual MAH exist in PP-g-MAH is another important parameter affecting the property of RGF-PP, especially the thermo-oxidative aging property of the composite. In this paper, the effect of different residual contents of MAH in PP-g-MAH on the thermo-oxidative aging properties of the RGF-PP is studied in terms of the tensile strength, notched impact strength and phase morphology
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