共查询到19条相似文献,搜索用时 78 毫秒
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超细丁苯粉末橡胶增韧聚丙烯的研究 总被引:3,自引:0,他引:3
采用一种新型超细丁苯粉末橡胶增韧聚丙烯(PP) ,考察了丁苯粉末橡胶用量、相容剂的种类及用量对PP性能的影响;观察了丁苯粉末橡胶在PP中的分散状态,研究了丁苯粉末橡胶对PP结晶性能的影响。结果表明:超细丁苯粉末橡胶的加入能够显著提高聚丙烯的韧性;加入相容剂B后的增韧效果更好;相容剂与超细丁苯粉末橡胶在PP中具有包藏结构;复合有成核剂的超细丁苯粉末橡胶比相容剂B有更明显的成核作用,可提高PP的结晶度,从而使PP的刚性和耐热性提高。少量相容剂B与之复合后,仍可保持这种较强的成核能力。 相似文献
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在中外闻名的太湖平原上,有一家以生产超细胶粉而知名的企业——江阴市台联超细胶粉有限公司。成立10年来,该公司已发展成为占地面积达5.5万平方米,建筑面积3.5万平方米,固定资产8000万元,拥有一定经济实力和技术力量的省级高新技术企业。由此,我们不得不提起江阴市台联超细胶粉有限公司的创始人——薛凤清。 相似文献
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硫化胶粉/PP共混材料的研究 总被引:12,自引:2,他引:10
研究了硫化胶粉/PP共混体系的力学性能,流动性能和热变形温度等。结果表明,利用硫化胶粉可以明显改善PP的冲击性能,而且胶粉粒径越小,改善的效果越显著,但共混体系的拉伸强度有所下降。胶粉含量在5%-15%时,共混体系的综合性能较好。 相似文献
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研究了β结晶成核剂和交联剂与超细碳酸钙共用时对聚丙烯的改性效果,结果表明,用0 5%β结晶成核剂与10%超细CaCO3改性PP比超细CaCO3改性PP的冲击强度提高125%;当用2%交联剂SJ 1时,在10%含量超细CaCO3下拉伸强度最高;在5%含量超细CaCO3下冲击强度达最高,相比用单一的超细CaCO3改性PP冲击强度提高80%。将包覆聚合物的超细碳酸钙和接枝聚丙烯用于PP改性时,其最佳条件为:填料/包覆聚合物比10∶1,接枝聚丙烯含量10%,复合填料含量7 5%,相比未包覆聚合物的超细CaCO3填充PP的冲击强度提高20%,填料用量增加50%。 相似文献
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本文应用固相力化学反应器强大的挤压、摩擦、剪切和环向应力的特点及其强大的分散、混合功能,实现废旧轮胎橡胶的常温粉碎制备高活性超细胶粉和热塑性塑料/废旧橡胶复合粉体,以及高性能聚合物/金属粉末/胶粉吸声、隔声功能材料,为废旧橡胶的高值化和功能化回收利用提供一种清洁、简便、节能、易于工业化生产的新技术、新工艺。 相似文献
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选择粒径分布适中的远红外发射微粉,采用一种新型的工艺方法对微粉进行有效的表面处理,在保证远红外发射率的前提下.从根本上解决了微粉在聚丙烯中分散不均和超细粉结团的问题,使得专用料的可纺性大幅提高,既可用来生产短纤维,也可用于生产长纤维。 相似文献
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To manufacture the hygroscopic sheets available for functional application, superfine down powder (SDP) and stearic acid modified superfine down powder (MSDP) were, respectively, blended and extruded with polypropylene (PP) to produce composite pellets, and the extruded pellets were hot‐pressed into composite sheets. The chemical reaction between SDP and stearic acid was characterized using the attenuated total reflection attachment on the Fourier transform infrared. PP/MSDP composites showed more uniform powder dispersion in PP matrix, higher compatibility, and better mechanical properties than that of PP/SDP composites, which showed an evident decrease in tensile strength and elongation at break compared with pure PP. It was worth noting that the Young's modulus of PP/SDP composites was higher than that of pure PP, but lower than that of PP/MSDP composites. The addition of SDP led to a large increase in water absorption of PP/SDP composites. However, the water absorption of PP/MSDP composites decreased slightly compared with that of PP/SDP composites. Furthermore, the effects of SDP and MSDP on the microstructural and thermal properties of different composites were also investigated, respectively. POLYM. COMPOS., 2009. © 2008 Society of Plastics Engineers 相似文献
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Natural fibers are rich in cellulose and they are a cheap, easily renewable source of fibers with the potential for polymer reinforcement. The presence of large amounts of hydroxyl groups makes natural fibers less attractive for reinforcement of polymeric materials. Composites made from polystyrene (PS)/styrene butadiene rubber (SBR) blend and treated rice husk powder (RHP) were prepared. The RHP was treated by esterification and acetylation. A similar series of composites was also prepared using maleic anhydride–polypropylene (MA–PP) as a coupling agent. The processing behavior, mechanical properties, effect of thermooxidative ageing, and surface morphology of untreated and chemically modified RHP were studied. There was a decrease in tensile strength (except MA–PP composites), elongation at break, and Young's modulus in chemically treated RHP composites. The postreaction process during thermooxidative ageing enhanced the tensile strength and Young's modulus of the esterified and MA–PP composites. Acetylation treatment was effective in reducing the percentage of water absorption in RHP/PS–SBR composites. In general chemically treated RHP/PS–SBR composites and MA–PP showed a better matrix phase and filler distribution. However, the degree of filler–matrix interaction was mainly responsible for the improvement of mechanical properties in the composites. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 92: 3320–3332, 2004 相似文献
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将自制的磺化丁苯橡胶离子聚合体(简称离聚体)在硬脂酸锌存在下于160~170℃在开炼机上与直链烃油及炭黑或超细CaCO3混炼,并热压成型。考察了不同阳离子中和的离聚体的吸油率及直链烃油、炭黑或超细CaCO3的填充量对离聚体力学性能的影响,以及对离聚体在Brabender密炼机上平衡扭矩的影响。结果表明,该离聚体填充50%(质量,下同)左右炭黑及40%左右直链烃油后其产物成为拉伸强度大于14MPa、 相似文献