高强度低VOC玻璃纤维增强聚丙烯材料的开发

Development of glass-fiber-reinforced polypropylene with high strength and low VOC

以含30%短玻璃纤维的聚丙烯(PP)为基础,从源头开始控制材料的气味和VOC含量,即将所有可能用到的配料参照大众汽车PV3900气味测试标准进行筛选,优先选择气味等级不超过3级的原料和助剂。主要对当前市场上的几种不同的低气味马来酸酐接枝聚丙烯相容剂(PP-g-MAH)、不同抗氧剂体系和不同气味吸收剂进行了研究。结果表明,最终选择出的配方材料的气味等级达到了3级以下,VOC也优于当前汽车行业要求的标准,其主要的TVOC含量降低到了3188μg/m^(3),远低于标准要求的5000μg/m^(3);其拉伸强度为106 MPa,弯曲强度为151 MPa,简支梁缺口冲击强度为11 kJ/m^(2),非缺口冲击强度为55 kJ/m^(2),热变形温度为145℃(1.8 MPa),均符合当前汽车用部分产品的使用要求。

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-gMAH)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 188μg/m^(3),which is far below the standard requirements of 5 000μg/m^(3).The material also achieved tensile strength of 106 MPa,bending strength of 151 MPa,notched Charpy impact strength of 11 kJ/m^(2),non-notched impact strength of 55 kJ/m^(2),and a thermal deformation temperature of 145℃ at 1.8 MPa.These properties can meet the requirements of some automotive products.