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研究了顺丁橡胶(BR)与牌号分别为ESBR 1502 E、ESBR 1586 E、ESBR 1723 E、ESBR 1739 E、SSBR 2557 S、SSBR 2564 S的丁苯橡胶(SBR)并用后的硫化特性、物理机械性能、回弹性能、耐磨性能、抗湿滑性能和生热性能。结果表明,BR与ESBR 1739 E并用后,焦烧时间缩短,硫化速率加快,其他并用胶的焦烧时间均比BR长,且硫化速率慢;BR与不同牌号SBR并用后拉伸强度、扯断伸长率、撕裂强度和回弹率均有所增大,耐磨性能下降,抗湿滑性能提高,滚动阻力增大,生热增加。 相似文献
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溶聚丁苯橡胶SSBR 2305在轮胎胎面胶中的应用 总被引:4,自引:2,他引:4
采用国际标准基本配方和工厂实用胎面胶配方考察了锡偶联改性SSBR2305的物理机械性能,并以动态粘弹谱仪考察了该橡胶用于轮胎胎面胶时的滚动阻力和抗湿滑性。结果表明,SSBR2305的物理机械性能与ESBR1502的相近,SSBR2305硫化胶的物理机械性能完全可以满足实际应用的要求,SSBR2305表现出类似于ESBR1502和ESBR1712的高抗湿滑性能,同时又具有接近于NR和BR的低滚动阻力,在胎面胶研究配方中,SSBR2205可实现高抗湿滑性和低滚动阻力的良好平衡。 相似文献
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按照纯炭黑配方,将溶聚丁苯橡胶(SSBR,牌号为2557-A)同乳聚丁苯橡胶(ESBR,牌号为1712)对比应用于全钢和半钢子午线轮胎胎冠胶配方中,确定了合适的胎冠胶配方,且进行了轮胎的试制和性能检测。结果表明,与ESBR 1712全钢胎冠胶相比,同等用量SSBR 2557-A的胎冠胶拉伸强度、定伸应力、Akron磨耗性能和压缩生热等性能均得到提高,但DIN磨耗性能有所下降,且具有更优的抗湿滑性和更低的滚动阻力;与ESBR 1712半钢胎冠胶相比,SSBR 2557-A胎冠胶具有优异的抗湿滑性能,而其他性能相差不大;采用SSBR 2557-A全钢子午线轮胎胎冠胶配方试制的轮胎顺利通过了耐久性试验;采用SSBR 2557-A半钢子午线轮胎胎冠胶配方试制轮胎的外缘尺寸、强度、脱圈阻力和高速性能、耐久性均达到国家标准,且还能够较大幅度提高轮胎的抗湿滑性能和滚动噪音性能。 相似文献
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介绍绿色轮胎胎面用合成橡胶溶聚丁苯橡胶(SSBR)和顺丁橡胶(BR)的研究进展。一代、二代和三代SSBR在轮胎胎面中应用后逐渐使轮胎的耐磨性能、滚动阻力和抗湿滑性能间的平衡性提高。BR在轮胎胎面胶中使用的主要为镍系BR和钕系BR,镍系BR由于价格便宜在国产轮胎胎面中应用较多,而钕系BR由于综合性能优异具有持续发展的潜能。 相似文献
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高性能ESBR制备技术 总被引:1,自引:1,他引:0
介绍高性能乳聚丁苯橡胶(ESBR)的制备技术,高性能ESBR主要包括预交联ESBR、高结合苯乙烯ESBR、环保型ESBR和纳米蒙脱土改性ESBR.预交联ESBR是在聚合过程中加入胺类、酯类和硅烷类第三单体,改善其与炭黑和白炭黑的亲和性.高结合苯乙烯ESBR是结合苯乙烯质量分数大于0.4的ESBR,采用高结合苯乙烯ESBR的轮胎抗湿滑性能和耐磨性能以及高速行驶安全性提高.环保型ESBR是在聚合过程中采用新型聚合终止剂替代能够产生亚硝胺的二乙基羟胺和二硫代氨基甲酸盐终止剂.纳米蒙脱土改性ESBR主要采用乳液插层法制备,其综合性能优于SBR1502. 相似文献
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Solid solutions of diphosphates of zinc and copper and of zinc and cobalt were synthesized from mixtures of pure diphosphates at temperatures up to 1000°C. Their X-ray diffractometry patterns varied continuously from one end member to the other. Solid solutions of orthophosphates of composition Zn3−x Cox(PO4 )2, with x = 0.4–1.6, were formed at temperatures up to 950°C; all exhibited the structure of γ-Zn3 (PO4 )2. Solid solutions of orthophosphates of composition Zn3−x Cux (PO4 )2 exhibited more-complex behavior. At 1000°C and copper contents of 20–80 mol%, a phase that is related to Cu3 (PO4 )2, termed here the "ε-phase," predominated. At 850°–950°C and in the region from 20 mol% to ∼33 mol% of copper, the solid solutions (the "η-phase") adopted the structure of graftonite. At 800°–900°C and 10–15 mol% of copper, the solid solutions exhibited a new structure (the "δ-phase"), which we found to be related to the mineral sarcopside. At temperatures 950°C, the solutions that contained 5–15 mol% of copper (the "β-phase") had the structure of β-Zn3 (PO4 )2, whereas at 800°–850°C, solutions with 5 mol% of copper (the "-phase") exhibited the structure of γ-Zn3 (PO4 )2. Attempts to synthesize Cu+ ZnPO4 and Cu+ Cu2+ Zn3 (PO4 )3 were unsuccessful. 相似文献
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为了提高油田的生产效率,设计最佳的油气集输处理的工艺流程,更好地完成油气水分离处理的任务。对油气集输工艺技术进行优化,发挥高效油气水分离处理设备的优势,提高油气水处理的质量,保证油气集输工艺顺利实施,获得最佳的油田产量外输。 相似文献
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建设创新型国家是我们中华民族的历史责任。“自主创新、重点突破、支撑发展、引领未来”的16字方针应当成为我们未来创新活动的指南。建设创新型国家把自主创新放在首位,并提出了引领未来的高标准要求。钢铁科技创新必须突出重点,抓住创新成果产业化这个关键,支撑起行业和国民经济的发展。 相似文献
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相比已经完善丰富的开采和勘探技术,油气的运输以及储存却仍然存在不足之处。我国对能源安全提出更加严格要求的同时,对区域经济的发展规划也有足够重视。因此,保障油气管道的安全则成为了我国能源安全战略的重中之重。在阐释油气管道现阶段在储运安全保障技术发展状况的基础上,分析了现存的问题及解决问题的手段,并指出未来可能使用的目标策略,为今后研究者提供一定程度上的借鉴经验。 相似文献
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膜的污染和劣化及其防治对策 总被引:25,自引:0,他引:25
较为系统地介绍了膜污染和劣化的定义和特点,因膜污染和劣化而造成的膜性能变化,以及如何预防、减少或清除膜污染和劣化的一些通用方法。 相似文献
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James L. White David G. Salladay David O. Quisenberry Donald L. MacLean 《应用聚合物科学杂志》1972,16(11):2811-2827
Gel permeation chromatographic (GPC) and thin-layer chromatographic (TLC) studies of polystyrene, polybutadienes (BR), and their copolymers (SBR) have been carried out. GPC primarily separates them on the basis of molecular size, and TLC, on the basis of composition. Methods of obtaining absolute molecular weight distributions for BR and SBR based upon variations of the Strasbourg Universal Calibration procedure are described. In particular, [η]–M relationships in both the GPC solvent (THF) and in a second solvent (toluene) were used; in addition, results of statistical mechanical calculations for \documentclass{article}\pagestyle{empty}\begin{document}$\overline {s^2 }$\end{document} (based on the assumption of negligible steric hindrance and freely rotating bonds) were applied. An experimental comparison of these methods was carried out, and use of the [η]–M relationships for both solvents was found to give satisfactory results. The predictions of the statistical theory were too low. A detailed study of polymer–solvent–gel interaction in the GPC unit was made through investigation of ternary phase equilibrium in the (polystyrene)–THF–(polymer) system. The polymers studied included BR and SBR with varying styrene contents. Experimental techniques for TLC separations of BR, SBR, and polystyrene according to the composition are described. 相似文献