Abstract:

This study reported the development of polypropylene （PP） matrix composites containing 30 wt% short glass fiber， in which all of the ingredients were used under the control of the odor and volatile organic compounds （VOC） from resources. The raw materials and additives with an odor grade less than grade 3 were selected preferentially according to the odor test standard of Volkswagen PV3900. Several types of low?odor maleic?anhydride?grafted polypropylene （PP?g?MAH） as a compatibilizer used for the composites， together with different antioxidant systems and different odor absorbents obtained from the current market were investigated studied. According to the results from the third?party inspection institution， the material obtained from the optimal formulation achieved an odor level of below grade 3， and its VOC level was also better than the current standards required by the automobile industry. Its total VOC content was reduced to 3 188 μg/m³， which is far below the standard requirements of 5 000 μg/m³. The material also achieved tensile strength of 106 MPa， bending strength of 151 MPa， notched Charpy impact strength of 11 kJ/m²， non?notched impact strength of 55 kJ/m²， and a thermal deformation temperature of 145 oC at 1.8 MPa. These properties can meet the requirements of some automotive products.

Key words: polypropylene, low odor compatibilizer, odor absorbent