低气味低VOC玻纤增强聚丙烯材料的研制

以聚丙烯(PP)树脂为基体,PP接枝马来酸酐(PP-g-MAH)为相容剂,纳米氧化锌和纳米二氧化钛为复合气味吸收剂,经双螺杆挤出机制备了玻璃纤维(GF)增强PP材料,并分别研究了各组分对材料力学性能和气味等级的影响。结果表明,相容剂PP-g-MAH为GF增强PP材料气味的主要来源,在提高气味等级方面,选用相容剂时,固相接枝工艺比熔融接枝工艺的好,且接枝率不宜太高。在选用PP粒料、接枝率为1.2%的固相接枝PP-g-MAH以及纳米氧化锌和纳米二氧化钛复合气味吸收剂的基础上,制备了低气味和低挥发性有机化合物的GF增强PP材料,其拉伸强度为62 MPa,弯曲强度为76 MPa,缺口冲击强度为8.5 k J/m~2,由其制备的汽车空调电机风扇叶轮产品的气味等级达到了Q/JLY J711061–2009标准的7级要求。

Study on Glass Fiber Reinforced Polypropylene with Low Odor and Low VOC

Glass fiber (GF) reinforced polypropylene (PP) materials were prepared by the twin screw extruder with PP as matrix,PP grafted maleic anhydride (PP-g-MAH) as compatibilizer,nano zinc oxide and nano titanium dioxide as composite odor absorbent. The effects of each component on the mechnical properties and odor of the materials were discussed. The results show that PP-g-MAH is main odor source in the materials and in terms of improving odor level,when selecting the compatibilizer,solid-state grafting technology is better than melt grafting technology and the grafting rate should not be too high. The GF reinforced PP materi-al with low odor and low volatile organic compounds (VOC) content was prepared on the basis of selecting granular PP,PP-g-MAH with 1.2%grafting rate via solid-state grafting and the composite odor absorbent,the tensile,bending strength and Izod notched im-pact strength reaches 62,76 MPa and 8.5 kJ/m2 respectively,the odor level of fan impeller in automotive air conditioning system produced by the low odor and low VOC material reaches the level 7 of Q/JLY J711061–2009 standard.