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试验研究环保塑解剂RENACIT-10替代五氯硫酚类塑解剂SJ—103在全钢载重汽车子午线轮胎胎面胶中的应用。结果表明,采用环保塑解剂RENACIT-10替代五氯硫酚类塑解剂SJ-103,对胶料的门尼焦烧时间、正硫化时间以及硫化胶的定伸应力、拉断伸长率和耐磨性能有所影响,对混炼胶的门尼粘度影响尤为显著。随着环保塑解剂RENACIT-10用量增大,混炼胶的门尼粘度和硫化胶的定伸应力呈减小趋势,正硫化时间呈缩短趋势,硫化胶的耐磨性能变差,老化后撕裂强度显著提高。以环保塑解剂RENACIT-10减量25%替代五氯硫酚类塑解剂SJ-103的效果最佳。 相似文献
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研究国产环保塑解剂A86在天然橡胶中的应用,并与国外同类产品进行对比。结果表明:与国外同类塑解剂相比,国产塑解剂A86的塑炼效果较好;胶料的门尼粘度减小,焦烧时间延长,耐热老化性能较优;硫化胶的硬度和定伸应力减小,撕裂强度增大;成品轮胎性能满足标准要求;原材料成本降低。 相似文献
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分析不同国产环保塑解剂(P-22,BGP,DPX-1,DPX-3)的成分,研究其对天然橡胶(NR)的塑解效果以及对胶料性能的影响。结果表明:国产环保塑解剂通常由DBD、酞菁铁和其他填料组成,其塑解效果可满足NR的要求;使用国产环保塑解剂的胶料的加工性能、硫化特性和物理性能与使用纯品DBD的胶料相当,但轮胎的滚动阻力略有增大;在低滚动阻力轮胎胎面胶中使用少量塑解剂P-22可以获得较好的滚动阻力性能,考虑到生产成本,可以选用塑解剂BGP或DPX-1替代塑解剂P-22。 相似文献
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研究工程机械轮胎胎体胶混炼工艺改进对胶料性能的影响。结果表明:通过将炭黑分2段加入,并将防老剂和塑解剂分开加入,混炼效率提高,塑解剂效能得到保护;与改进前胶料相比,改进后胶料的门尼粘度降低,硫化特性变化不大,硬度、定伸应力、拉伸强度和撕裂强度相当,H抽出力明显增大,自粘性显著提高,流动性好,压延半成品尺寸稳定性提高。 相似文献
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研究异戊橡胶(IR)替代天然橡胶对胶料各项性能的影响,以分析其在全钢载重子午线轮胎中的应用情况。结果表明:随着IR用量的增大,混炼时能量消耗减小,胶料的加工性能变优、自粘性增大;胶料的门尼焦烧时间变化不大,硫化速度和MH呈减小趋势;硫化胶的强伸性能呈下降趋势、动态性能变差、生热增大、磨耗性能提高,老化后胶料物理性能明显降低、磨耗性能下降;当IR用量大于30份时,胶料的综合性能下降明显。 相似文献
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研究4种牌号溶聚丁苯橡胶(SSBR)在高性能轮胎胎面胶中的应用。结果表明:SSBR5251H胶料的门尼粘度较小,加工性能较好,回弹值最大,耐磨性能最好,滚动阻力最小;与SSBR5251H胶料相比,SSBR5360H和SSBR5271H胶料的300%定伸应力增大,回弹值减小,耐磨性能下降,SSBR5360H胶料具有最佳的抗湿滑性能,SSBR5271H胶料具有良好的抗湿滑性能和较低的滚动阻力;SSBR6440H胶料的门尼粘度最大,门尼焦烧时间最短,拉伸强度和撕裂强度最大,耐磨性能良好,与SSBR5271H胶料相比,其玻璃化温度相同,0 ℃时的损耗因子减小,60 ℃时的损耗因子和压缩疲劳温升增大,具有较高的滚动阻力和生热。 相似文献
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乙烯酮(双乙烯酮)是十分重要的化工中间体,其下游产品较多。江苏某化工厂开发生产乙烯酮(双乙烯酮)下游产品三十多个,年生产规模三万多吨,是国内以乙烯酮(双乙烯酮)为中间体生产精细化学品的综合骨干企业。针对乙烯酮(双乙烯酮)下游产品废水特点,该厂结合企业实际,开展了产品优化,结构调整,清洁生产,资源循环利用,节水降耗等工作,从源头削减了污染物的生产。同时投资二千多万元新建预处理装置三套,6000m3/d废水生化处理装置一套,使全厂乙烯酮(双乙烯酮)下游产品的废水得到了有效的治理。 相似文献
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The objective of the study was to explore the effect of the degree of deacetylation (DD) of the chitosan used on the degradation rate and rate constant during ultrasonic degradation. Chitin was extracted from red shrimp process waste. Four different DD chitosans were prepared from chitin by alkali deacetylation. Those chitosans were degraded by ultrasonic radiation to different molecular weights. Changes of the molecular weight were determined by light scattering, and data of molecular weight changes were used to calculate the degradation rate and rate constant. The results were as follows: The molecular weight of chitosans decreased with an increasing ultrasonication time. The curves of the molecular weight versus the ultrasonication time were broken at 1‐h treatment. The degradation rate and rate constant of sonolysis decreased with an increasing ultrasonication time. This may be because the chances of being attacked by the cavitation energy increased with an increasing molecular weight species and may be because smaller molecular weight species have shorter relaxation times and, thus, can alleviate the sonication stress easier. However, the degradation rate and rate constant of sonolysis increased with an increasing DD of the chitosan used. This may be because the flexibilitier molecules of higher DD chitosans are more susceptible to the shear force of elongation flow generated by the cavitation field or due to the bond energy difference of acetamido and β‐1,4‐glucoside linkage or hydrogen bonds. Breakage of the β‐1,4‐glucoside linkage will result in lower molecular weight and an increasing reaction rate and rate constant. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 3526–3531, 2003 相似文献
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我厂3号回转窑(Φ4m×60m)生产线在1996年年底由SP窑(产量912t/d)改为NSP窑(产量1320t/d),预分解系统为四级旋风预热器带离线式分解炉 相似文献
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Conclusions It is significant that the purification on a single passage of viscose through porous ceramic corresponds to the result of a two-stage filtration of it in industrial filter-presses with standard fillings.Kiev Combine. Kiev Technological Institute of Light Industry. Translated from Khimicheskie Volokna, No. 3, pp. 20–22, May–June, 1969. 相似文献
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利用组件技术开发化工原理实验课件,给出了系统层、组件库层和应用层的架构划分。重点讨论了组件库的设计,给出了流体阻力这一典型实验的实现描述。实践证实,基于组件技术可以提高仿真实验的开发效率。 相似文献