全钢载重子午线轮胎气密层胶配方改进

通过并用NR并加入适量陶土,对全钢载重子午线轮胎气密层胶配方进行改进.结果表明,改进后的气密层胶透气系数有所增大,但能够满足有内胎轮胎气密层的要求;采用改进配方的轮胎耐久性能和高速性能与改进前的轮胎相当;采用改进配方生产轮胎,可减小BIIR用量,大幅度降低生产成本.     

层状硅酸盐/橡胶纳米复合材料(五)纳米复合材料在轮胎气密层中的应用

该文对比了溴化丁基橡胶气密层与纳米复合材料气密层的性能.研究表明,采用纳米复合材料在达到气密层性能目标的同时可降低透气率,从而降低轮胎气密层的厚度,减轻轮胎的质量.降低气密层的厚度对轮胎的工作性能也有利,同时还可提高工厂炼胶设备利用率和效率.     

CF炭黑在载重汽车子午线轮胎气密层胶中的应用

研究CF炭黑在轮胎气密层胶中的应用。结果表明：70份CF炭黑/炭黑N330并用体系（并用比40/30）代替60份炭黑N660用于轮胎气密层胶中,胶料的物理性能和生热相当,透气性降低,生产成本降低;成品轮胎的使用寿命延长,气压保持性较好。     

气密性增进剂SD1517在子午线轮胎气密层胶中的应用

研究气密性增进剂SD1517在子午线轮胎气密层胶中的应用。试验结果表明,在轿车和全钢载重子午线轮胎气密层胶中加入气密性增进剂SD1517,并适当减小操作油的用量,气密层胶工艺性能和气密性改善,物理性能和成品轮胎性能变化不大,生产成本降低。     

一种用于轮胎气密层的材料和利用该材料制备的轮胎

正授权公告号:CN 105602132B授权公告日:2018年5月11日专利权人:双钱集团上海轮胎研究所有限公司、双钱集团股份有限公司发明人:谢斌本发明公开了一种用于轮胎气密层的材料和利用该材料制备的轮胎。气密层胶的主要组分和用量为:溴化丁基橡胶50～90,丁苯橡胶10～50,氧化锌2～4,硫黄0.4～1,促进剂DM 1～2。对比试验表明,与现有气密层胶及其制备的轮胎气密层相比,本发明气密层胶及其制备的轮胎气密层物理性能相当,但成本更低。     

改性氯磺化聚乙烯橡胶在无内胎轮胎气密层胶中的应用

研究改性氯磺化聚乙烯橡胶（CSM）在无内胎轮胎气密层胶中的应用。结果表明：在无内胎轮胎气密层胶配方中用改性CSM部分替代氯化丁基橡胶,气密层胶的物理性能有所提高,气密性能变化不大,粘合性能有所改善,工艺性能和产品质量提高,生产成本降低。     

改性氯磺化聚乙烯橡胶在无内胎轮胎气密层中的应用

研究改性氯磺化聚乙烯橡胶(CSM)在无内胎轮胎气密层中的应用。结果表明,在无内胎轮胎气密层胶配方中用改性CSM部分替代氯化丁基橡胶,气密层胶的物理性能有所提高,气密性能变化不大,粘合性能有所改善,工艺性能和产品质量提高,生产成本降低。     

国产BIIR2302在全钢载重子午线轮胎气密层胶中的应用

研究国产溴化丁基橡胶(BIIR)2302在全钢载重子午线轮胎气密层胶[天然橡胶/BIIR并用胶(并用比为20/80)]中的应用。结果表明:与采用进口BIIR2222的气密层胶相比,采用BIIR2302的气密层胶硫化速度和加工安全性相当;气密性差异不大,拉断伸长率较大,其他物理性能相近;工艺性能较好;成品轮胎耐久性能略好。BIIR2302完全可以替代BIIR2222用于全钢载重子午线轮胎气密层胶中。     

纳米氧化锌在全钢载重子午线轮胎气密层中的应用

研究纳米氧化锌替代普通氧化锌在无内胎全钢载重子午线轮胎气密层中的应用。结果表明:在气密层胶中以2.1份纳米氧化锌替代3.5份普通氧化锌,胶料的焦烧时间和t90延长;硫化胶的物理性能变化不大,气密性能基本相当,气密层胶与过渡层胶的粘合性能较好;成品轮胎的耐久性能达到国家标准要求,且生产成本降低。     

充气压力保持率对轮胎老化和耐久性能的影响

研究气密层胶中BⅡR用量对气密层胶性能和轮胎充气压力保持率的影响,及充气压力保持率与轮胎老化和耐久性能的关系.结果表明,随着BⅡR用量的增大,气密层胶的空气和湿气渗透性明显降低,强伸性能变化不大,轮胎充气压力保持率提高;充气压力保持率与轮胎的耐久性能,胎肩垫胶和带束层胶的粘合强度、固定氧质量和模量变化率及热空气老化和低气压试验后胎面总裂纹面积的相关性显著;充气压力保持率最大的轮胎,其部件能够得到最好的保护,不易出现老化变硬现象,带束层边缘不易出现破坏,耐久性能最好.     

乙烯酮(双乙烯酮)下游产品废水的治理技术

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。     

我国聚碳酸酯工业发展概况

介绍我国聚碳酸酯生产能力和消费需求,对聚碳酸酯在信息工业中的应用作了简短介绍     

Effect of degree of deacetylation of chitosan on the kinetics of ultrasonic degradation of chitosan

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     

几种乙炔加压设备性能的比较

阐述并比较了几种加压设备在乙炔加压清净过程中的性能和特点。     

Semi-empirical equation of state of metals. Equation of state of aluminum

A semi-empirical equation of state for metals is described. Its capabilities are demonstrated by the example of the equation of state for aluminum. New experimental data are presented on the location of the isentrope of aluminum for unloading from the state at p = 229.71 GPa on the shock adiabat to an aerogel (SiO₂) of density 0.08 g/cm³. __________ Translated from Fizika Goreniya i Vzryva, Vol. 44, No. 2, pp. 61–75, March–April, 2008.     

水泥水化热测定方法综述

水泥水化热是中、低热水泥和核电工程用水泥的一项关键的技术指标。全球范围内测定水泥水化热的方法有溶解法、直接法/半绝热法、等温传导量热法三种。本文总结了中、美、欧相关方法标准,对其测试原理、仪器设备、试验过程等方面进行了比对,并对其在领域的应用做了简单的概括。     

Calorimetric and Computational Study of Enthalpy of Formation of Diperoxide of Cyclohexanone

A thermochemical rather simple experimental technique is applied to determine the enthalpy of formation of Diperoxide of ciclohexanone. The study is complemented with suitable theoretical calculations at the semiempirical and ab initio levels. A particular satisfactory agreement between both ways is found for the ab initio calculation at the 6–311G basis This set level. Some possible extensions of the present procedure are pointed out.     

船舶柴油机涡轮增压器的清洗

采用喷射清洗剂的方法，清洗涡轮叶片积炭。     

杀虫磺缓释剂杀钉螺试验报告

杀虫磺缓释剂浸杀成螺、幼螺、螺卵效果好，现场应用缓释片６３克／米＾２，半年后活螺平均密度下降９３．２％，春季施药１次，可达到控制当年钉螺的扩散。     

塔设备改造选型的分析

就当前扩产增容中塔设备设计和改造时板式塔和填料塔的选型问题加以分析。在评述目前国内常用的几种塔板和新型填料之后，着重介绍一种新型塔板（导向梯形浮阀塔板）和一种新型填料（波环填料——乾隆帕克）。