共查询到19条相似文献,搜索用时 849 毫秒
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介绍了汽车用聚丙烯(PP)基础树脂的开发现状,简述了国内汽车用改性PP材料的应用概况,并展望了其未来的发展趋势。高模量、高抗冲、高流动PP是汽车用PP的主要品种,汽车用改性PP主要包括无机填料和弹性体增强增韧改性PP、玻璃纤维改性PP、低气味改性PP、耐刮擦PP等;汽车用改性PP的回收利用也变得越来越重要。 相似文献
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聚丙烯汽车导流板专用料的研究 总被引:2,自引:1,他引:1
介绍了中华汽车导流板PP改性专用料的研制。采用双螺杆挤出加工工艺,分析了PP基体树脂和各种改性成分,如增韧剂、填充矿物等对材料综合性能的影响,并研究了生产工艺对材料性能的影响,确定了最佳工艺参数和配方。使用这种PP改性专用料制成的导流板完全满足性能要求,并已经成功地应用在中华汽车上。 相似文献
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聚丙烯汽车配件专用料开发 总被引:4,自引:0,他引:4
研究了PP汽车配件专用料配方。采用玻璃纤维、无机填料增强和橡胶增韧改性 ,通过双螺杆共混挤出造粒 ,有效地改善了PP的综合性能 ,获得了两种汽车配件专用PP料 ,即汽车风扇专用料和汽车散热器罩料。确定的风扇专用料配方为PP 3 0~ 70份 ,橡胶 15~ 3 0份 ,聚烯烃 5~ 2 0份 ,玻璃纤维 5~ 2 0份 ;散热器罩专用料配方为PP5 0~ 80份 ,橡胶母粒 5~ 2 0份 ,无机填料 15~ 3 0份。试用结果表明配方专用料性能良好。 相似文献
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针对车用聚丙烯复合材料的气味物质种类,筛选气味吸附剂,并考察吸附机理。研究发现,硅藻土、A1、A2、PY88能吸收甲醛气味;活性氧化物能消除丙酮气味;A2能吸收乙酸乙酯气味,气味分子直径与吸附剂孔径越接近吸收活性越高。 相似文献
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Electrolysis of liquid hog manure under direct current achieved amelioration of odour, in terms of both odour quality and odour intensity, and simultaneously reduced the population of odour‐causing bacteria by two orders of magnitude. A comparison of anode materials indicated that hydroxyl radical‐forming anodes (boron‐doped diamond and Ebonex) were the most effective, but unfortunately these materials are not yet available commercially in large size format. Dimensionally stable anodes composed of Ti/IrO2 were found to be satisfactory; lead‐based anodes leached unacceptable quantities of inorganic lead into the treated manure, and graphite anodes tended to disintegrate on long‐term use. The mechanism of action of the bactericidal effect involves a combination of toxicity by O2 that is released at the anode and hypochlorination due to the chloride ion that is present in manure. The proposed technology was shown to be successful at the 27 L scale in an on‐farm demonstration. 相似文献
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Polyolefins like polyethylene (PE), polypropylene (PP) and their copolymers inclusive elastomers (EPM, EPDM) are materials with wide ranges of properties and excellent environmental compatibility. Therefore use and production of these products increase steadily. By the development of new catalysts and advanced technologies tailor-made products with new combinations of properties are available which open superior applications. To these products belong materials with Schúlz,Flory- or bimodal molecular mass distributions, new types of linear low density products with homogeneous comonomer distribution, multiphase polypropylene blends and long glass fibre reinforced polypropylene materials. With metallocenes new types of polyolefins can be synthesized like syndiotactic polypropylene and other polyolefins. 相似文献