高门尼粘度异戊橡胶在全钢载重子午线轮胎中的应用

研究高门尼粘度异戊橡胶（HMIR）在全钢载重子午线轮胎中的应用。结果表明：分别以30,20和20份HMIR等量替代天然橡胶（NR）用于胎面胶、胎体帘布胶和胎肩胶,胎面胶的耐磨和抗切割性能提高,滚动阻力减小;胎体帘布胶的300%定伸应力、撕裂强度和粘合性能相当;胎肩胶的300%定伸应力和撕裂强度增大,拉伸强度略减小;采用HMIR部分等量替代NR试制的全钢载重子午线轮胎的充气外缘尺寸、强度和耐久性能均达到国家标准,实际使用性能与全NR轮胎相当或略优。     

国产癸酸钴在全钢载重子午线轮胎中的应用

试验研究国产癸酸钴替代进口癸酸钴在全钢载重子午线轮胎中的应用。结果表明,以国产癸酸钴替代进口癸酸钴用于全钢载重子午线轮胎带束层胶和胎体帘布胶中,硫化胶的粘合性能稍优,物理性能和成品轮胎性能基本相当,原材料成本明显降低。     

增粘树脂WDH-B在载重斜交轮胎中的应用

试验研究增粘树脂WDH-B在载重斜交轮胎中的应用。结果表明,在轻型载重轮胎胎体帘布层外层胶中加入增粘树脂WDH-B,硫化胶的300%定伸应力减小,撕裂强度增大;成品轮胎胎体帘布层间的粘合强度提高,耐久性能符合国家标准要求。在矿山系列载重轮胎胎面胶中加入增粘树脂WDH-B,硫化胶的撕裂强度略有增大,屈挠裂口长度明显减小;成品轮胎胎面胶的物理性能变化不大,轮胎使用寿命延长。     

全钢载重子午线轮胎胎体帘布劈缝的原因分析及解决措施

分析全钢载重子午线轮胎胎体帘布劈缝的原因并提出相应解决措施.通过采取合理确定胎体帘布胶的门尼粘度,胎体帘布上贴两片窄胶片改为贴一片宽胶片,严禁使用发生喷霜的内衬层和胎体帘布,定期校正压延机辊速,提高压延辊温度,压延机冷却装置处安装风机,实现胎体帘布压延工序修边、裁断时免修边等措施后,全钢载重子午线轮胎胎体帘布劈缝质量缺陷显著减少,胎体帘布劈缝废品占废品比例大幅减小.     

全钢载重子午线轮胎胎体帘布稀线原因分析及解决措施

分析全钢载重子午线轮胎胎体帘布稀线原因,并提出相应解决措施。全钢载重子午线轮胎胎体帘布稀线主要表现为贯通性帘布稀线、局部帘布稀线、局部多处帘布稀线和多根帘线稀开。通过有效控制帘布压延、裁断和成型接头质量,严格控制半成品存放期限,规范内衬层、垫胶接头,定期检查设备,合理设置压延、裁断工艺参数等措施,胎体帘布稀线的发生率明显降低。     

全钢载重子午线轮胎成品质量问题及解决措施

全钢载重子午线轮胎成品质量问题及解决措施金永哲，滕忠梅（桦林集团总公司１５７０３２）我厂全钢载重子午线轮胎自正式投产以来，一些质量问题偶有发生，如胎体帘布稀线、胎里鼓包、胎里露钢丝、胎侧缺胶等，我们分析了产生原因并提出了相应解决措施。１胎体帘布稀线胎...     

CF系列炭黑的应用性能研究

试验研究CF系列炭黑在全钢载重子午线轮胎过渡层和气密层以及载重斜交轮胎胎体帘布层中的应用。结果表明:在全钢载重子午线轮胎过渡层和气密层胶料中增用炭黑CF604,胶料的物理性能略有提高,成本大幅下降;在载重斜交轮胎胎体帘布层中以炭黑CF604部分替代炭黑N660,胶料的物理性能大幅提高,成品轮胎的粘合强度和耐久性能有所提高,成本大幅下降。     

新型粘合剂CRA-100PRC在全钢载重子午线轮胎胎体胶中的应用

研究新型粘合剂CRA-100PRC在全钢载重子午线轮胎胎体胶中的应用。结果表明,在全钢载重子午线轮胎胎体胶中以粘合剂CRA-100PRC减量替代粘合剂RA-65,胶料的焦烧时间缩短,硫化速度加快,硫化胶的粘合性能提高,其他性能基本相当,成品性能完全能够满足使用要求,可减少环境污染。     

炭黑N330在全钢载重子午线轮胎胎体胶中的应用

研究炭黑N330在全钢载重子午线轮胎胎体胶中的应用.结果表明:在胎体胶中以炭黑N330等量替代炭黑N326,胶料的MH增大,炭黑分散性提高,硫化胶的定伸应力增大,压缩生热升高,耐屈挠性能下降;以炭黑N330减量替代炭黑N326,并适当调整硫黄用量,胶料的MH减小,炭黑分散性改善,硫化胶的撕裂强度减小,压缩生热降低,耐屈挠性能提高,成品轮胎的耐久性能达到企业标准要求.     

无内胎全钢载重子午线轮胎三角胶构成对胎圈耐久性能的影响

以12R22.5无内胎全钢载重子午线轮为例,研究无内胎全钢载重子午线轮胎三角胶软质胶与硬质胶体积比和组成结构对胎圈耐久性能的影响。结果表明:三角胶软质胶/硬质胶体积比为3∶1时,胎体帘布端点的应变化能较小,胎圈耐久性能较好。     

分解炉扩径的技术改造

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     

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。     

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。     

生物油的成分分析及物性测定

以添加FeCl2的ZnCl2-KCl混合熔盐裂解纤维素和秸秆,制得生物油。采用傅立叶变换红外光谱法和气相色谱-质谱法分析生物油的成分。结果表明,生物油中成分复杂,含有氧元素、多种有机化合物,主要包括酮类、醛类、酚类及羧酸类等。测定了20～80℃生物油的密度和粘度,发现生物油的密度与温度呈较好线性关系,而生物油的粘度均大于水的粘度,且不同熔盐体系对秸秆生物油的粘度无较大影响。     

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     

Process of acceleration of filtration of viscose

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.     

Approximation of temperature dependence of the modulus of elasticity of glass

A refined nonlinear value of the main parameter of a material, i.e., the elongation modulus versus the instant temperature value, was suggested for introduction into the computational algorithm of tempering stresses.