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研究偶联剂(Si69和B-69)与离子液体溴化1-丁基-3-甲基咪唑(BMIM)单用和并用改性白炭黑补强天然橡胶(NR)的性能。结果表明:与未改性白炭黑补强NR胶料相比,偶联剂Si69、偶联剂B-69和BMIM改性白炭黑补强NR胶料的硫化速率加快,Payne效应减弱,物理性能和耐磨性能提高,滚动阻力降低,偶联剂Si69改性白炭黑的效果优于偶联剂B-69;与偶联剂单用改性白炭黑补强NR胶料相比,偶联剂/BMIM并用改性白炭黑补强NR胶料的硫化速率加快,白炭黑与NR相互作用增强,交联密度增大,物理性能和耐磨性能显著提高,滚动阻力降低,偶联剂B-69/BMIM并用改性白炭黑补强NR胶料的滚动阻力小于偶联剂Si69/BMIM并用改性白炭黑补强NR胶料,抗湿滑性能相差不大;BMIM改性白炭黑补强NR胶料的综合性能最佳。 相似文献
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用断裂力学方法研究炭黑N330、炭黑N330/白炭黑和白炭黑补强NR硫化胶的疲劳破坏特性.结果表明,与炭黑N330和炭黑N330/白炭黑补强的NR硫化胶相比,白炭黑补强的NR硫化胶疲劳寿命较长,内部潜在缺陷较少,抗裂纹扩展性能较好;随着疲劳时间的延长,NR硫化胶拉断时的应变能密度减小;疲劳寿命方程能够快速、准确地预测NR硫化胶的疲劳寿命. 相似文献
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近年来,高分散性白炭黑已成为替代炭黑用于低滚动阻力轮胎的首选填料。但是,天然橡胶与白炭黑和偶联剂的并用依旧是一大挑战,而这种并用也可为交通运输业降低能源消耗提供巨大的潜力。本文综述了近来白炭黑在天然橡胶(NR)中补强的研究进展及其在轮胎技术中的重要性,重点介绍了近来对白炭黑在NR胶料中混炼过程的优化以及非橡胶组分(如蛋白质)对白炭黑补强的影响。对环氧化NR之类的改性NR和脱蛋白NR的利用,是提高NR与白炭黑之间的相溶性以及将蛋白质对偶联剂的干扰降至最低的可选方法。更好地理解NR/白炭黑体系所遇到的问题,将有助于进一步开发用于NR,特别是用于高填充白炭黑轮胎胶料的白炭黑技术。 相似文献
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研究补强体系、生胶并用和硫化体系对充环烷油的溶聚丁苯橡胶(SSBR)胶料性能的影响。结果表明:对纯炭黑补强体系,炭黑用量为75份的胶料的综合性能较好,两种炭黑并用体系的胶料的综合性能提高,但耐磨性能稍差,对炭黑/白炭黑并用补强体系,白炭黑用量为20份的胶料的综合性能优异,继续增大白炭黑用量,填料分散性和胶料性能下降;SSBR并用20份顺丁橡胶,胶料的压缩生热和滚动阻力降低,耐磨性能提高,耐老化性能优异,其他性能满足使用要求;在硫化体系中硫黄用量对SSBR胶料性能的影响最大,硫黄的适宜用量为1.4~1.6份。 相似文献
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研究自制新型白炭黑对天然橡胶(NR)性能的影响,并与市售白炭黑进行对比。结果表明:与市售白炭黑NR胶料相比,自制白炭黑NR胶料的硫化时间缩短,拉伸强度、拉断伸长率、弹性和耐磨性能较好,生热较低,耐屈挠龟裂性能相当;自制白炭黑用量为30份时胶料综合性能最佳。 相似文献
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研究超细全硫化粉末丁苯橡胶(UFPSBR)对天然橡胶(NR)/丁苯橡胶/顺丁橡胶(BR)胎面胶性能的影响。结果表明:与未加UFPSBR的胎面胶相比,加入2~3份UFPSBR的NR/溶聚丁苯橡胶/BR胎面胶拉伸强度略有减小,耐磨性能和抗湿滑性能提高,生热降低;加入1~2份UFPSBR的NR/乳聚丁苯橡胶/BR胎面胶拉伸强度增大,抗湿滑性能略有提高,滚动阻力变化不大,耐磨性能下降。 相似文献
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本文用偶联剂Si-69、B-69和离子液体[溴化1-丁基-3-甲基咪唑(BMIM)]单独改性白炭黑,同时用两种偶联剂分别与离子液体BMIM并用改性白炭黑,对比研究了其对NR性能的影响。结果表明,与未改性白炭黑相比,Si-69、B-69和BMIM改性白炭黑后,填充NR的硫化速率加快,Payne效应减弱,力学性能改善,滚动阻力降低;其中,BMIM改性白炭黑填充NR的综合性能最优,其拉伸强度和撕裂强度比未改性白炭黑填充NR提高了一倍。与偶联剂单独改性白炭黑相比,偶联剂与BMIM并用改性白炭黑后,填充NR的t90进一步缩短,填料-橡胶相互作用更强,交联密度更大,力学性能进一步提高,滚动阻力变得更低。 相似文献
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Rice husk ash was incorporated into natural rubber (NR) using a laboratory size two‐roll mill. Curing using a conventional vulcanization system (CV) was chosen, and cure studies were carried out on a Monsanto rheometer. Physical testing of the NR vulcanizates involved the determination of tensile, tear, and abrasion resistances, and hardness. Fourier transform infrared spectroscopy (FTIR) analysis was done to verify the presence of the characteristic functional groups of precipitated silica in MHA (milled husk ash) and THA (treated husk ash). The effect of the coupling agent, bis(3‐triethoxysilylpropyl)‐tetrasulfane (Si‐69), on the curing and physical properties of the vulcanizates was investigated. A chemical treatment on a rice husk ash was done, and the effects of this procedure are also reported. For comparison, two commercial fillers, precipitated silica (Zeosil‐175) and carbon black (N774), were also used. Although the presence of the silane coupling agent had not brought the expected increase in properties, treated husk ash showed exceptional performance in terms of tensile strength and abrasion resistance of the filled vulcanizates. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 76: 1019–1027, 2000 相似文献
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Vorapong Pimolsiriphol Pongdhorn Saeoui 《Polymer-Plastics Technology and Engineering》2013,52(2):113-121
The present work aims to study the relationship among the thermal ageing stability, dynamic properties, cure systems, and antioxidants in natural rubber (NR) vulcanisates. Thermal degradation behavior of NR vulcanisates has been investigated and correlated to the changes in cross-link density, tensile and dynamic mechanical properties. The results obtained show that thermal ageing properties of NR vulcanisates depend strongly on cross-link density, which changes during thermal oxidative ageing or the so-called postcuring effect. In addition, the increases in ageing temperature and time lead dominantly to the postcuring and linkages scission phenomena in vulcanisates cured with CV and EV systems, respectively. With increasing ageing temperature, the tensile strength shows sharp drop at ageing temperature higher than 70°C and 100°C for the specimens cured with CV and EV systems, respectively. The sharp drop of tensile strength of vulcanisates cured with CV system is attributed to the too high cross-link density, which is caused by the postcuring effect. In the case of the vulcanisates cured with EV system, the linkage scission causes the sharp drop of tensile strength. The addition of amine-based antioxidant appears to improve ageing properties. However, the excessive antioxidant reduces tensile properties via a decrease in cross-link density. 相似文献
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对不同硫化体系和硫化方式硫化的NR胶乳胶膜的结构与性能进行研究。结果表明:采用不同硫化体系的硫化胶乳所形成的硫交联键主要的为多硫键,硫化胶乳胶膜的结构对性能的影响因硫化方式不同而有差异。 相似文献