炭黑N326在矿山用轮胎胎面胶中的应用

试验研究炭黑N326在矿山用轮胎胎面胶中的应用。结果表明,在胎面胶中以炭黑N326替代炭黑N220,胶料硫化特性相差不大,拉伸强度、拉断伸长率、撕裂强度和回弹值增大,压缩疲劳温升降低;成品轮胎耐久性能提高,生产成本下降。     

双相炭黑在全钢载重子午线轮胎胎面胶中的应用

试验研究双相炭黑CRX2125在全钢载重子午线轮胎胎面胶中的应用。结果表明,在胎面胶中以双相炭黑CRX2125等量替代炭黑N134,胶料物理性能基本保持不变,生热和滚动阻力降低,耐磨性能下降;成品轮胎耐久性能提高,胎冠生热降低,生产成本略微增大,轮胎燃油经济性大幅提高。     

多壁碳纳米管GC-21在全钢巨型工程机械子午线轮胎胎面胶中的应用

研究多壁碳纳米管GC-21在全钢巨型工程机械子午线轮胎胎面胶中的应用。结果表明：在胎面胶中以多壁碳纳米管GC-21部分替代炭黑N234，可改善胶料的导热性能，提高胶料的定伸应力、拉伸强度、耐磨性能和抗撕裂性能，胶料生热降低；成品轮胎的内部温度降低，使用寿命延长。     

炭黑N231在工程机械子午线轮胎胎面胶中的应用

对工程机械子午线轮胎胎面胶配方进行改进。结果表明:使用炭黑N231代替炭黑N220,并适当增大炭黑用量,能够有效提高胶料的邵尔A型硬度、定伸应力、抗崩花掉块性能和抗切割性能,降低生热,延长轮胎的使用寿命。     

奇耐粉N9在全钢载重子午线轮胎胎面胶中的应用

研究奇耐粉N9在全钢载重子午线轮胎胎面胶中的应用。结果表明:在全钢载重子午线轮胎胎面胶中加入5份奇耐粉N9,胶料的物理性能无明显下降,胎面挤出稳定性提高,成品轮胎耐久性能提高,胎面胶成本明显下降,经济效益明显。     

低滞后炭黑DZ-13在载重轮胎胎面胶中的应用

探讨低滞后炭黑DZ-13在载重轮胎胎面胶中的应用。结果表明,采用低滞后炭黑DZ-13部分替代炭黑N234并增大生胶体系NR/BR并用比,可使胎面胶的生热降低,拉伸性能、撕裂强度和回弹性提高,成品轮胎的速度性能显著改善,性能价格比提高。     

炭黑N351在大型实心轮胎胎面胶中的应用

研究新工艺、高结构、高耐磨炭黑N351在大型实心轮胎胎面胶中的应用。结果表明,在胎面胶配方中以炭黑N351替代中超耐磨炭黑N220,硫化胶的各项物理性能和耐磨性能相当,压缩生热明显降低,成品轮胎的耐久性能提高20%。     

环保型充油乳聚丁苯橡胶ESBR1723N在轮胎中应用的评价

通过环保型充油乳聚丁苯橡胶ESBR1723N替代ESBR1500E应用于子午胎胎面胶和胎侧胶,评价了ESBR1723N在轮胎中的应用性能。结果表明:ESBR1723N可以用于开发子午轮胎胎面胶,其制备工艺可以得到较大改善,且制备的胎面胶耐屈挠龟裂性能、耐DIN磨耗性能、耐疲劳压缩破坏能力有所提高,但是其硫化效率、撕裂强度、耐切割性能略有降低;ESBR1723N可以用于开发子午轮胎胎侧胶,且制备的胎面胶综合性能略有提高。     

炭黑N234在全钢轻型载重子午线轮胎胎面胶中的应用

对全钢轻型载重子午线轮胎胎面胶配方进行优化。结果表明,采用炭黑N234替代炭黑N115,并对胎面胶配方进行适当调整,胶料挤出温度降低,挤出速度提高,挤出性能明显改善,硫化胶生热降低,成品轮胎耐久性能和高速性能提高。     

丁苯橡胶矿用工程机械轮胎胎面胶的研究

介绍丁苯橡胶（SBR）矿用工程机械轮胎胎面胶的研究。结果表明,与天然橡胶/SBR（并用比70/30）矿用工程机械轮胎胎面胶相比,优化配方的SBR矿用工程机械轮胎胎面胶耐屈挠性能提高,老化前后的定伸应力、拉伸强度、拉断伸长率、撕裂强度增大,成品轮胎耐久性能改善,原材料成本降低。     

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。     

A study of miscibility of blends of polybutadienes of varying microstructure

The miscibility of various amorphous polybutadienes with mixed microstructures of 1,4 addition units (cis, 1,4 and trans 1,4) and 1,2 addition units have been investigated. The studies here involved optical transparency, differential scanning calorimetry, and small angle light scattering. It was found that a 90 percent (cis) 1, 4 addition polybutadiene was immiscible with high (91 percent) 1,2 addition polybutadiene. Reduction of the 1,2 content to 71 percent induced an upper critical solution temperature (UCST) with the cis 1,4 polymer. Polybutadienes with 50 percent and 10 percent 1,2 contents were miscible above the crystalline melting temperature of the cis 1,4 polybutadiene. Immiscibility of the 91 percent 1,2 addition polymer was also found with a 10 percent 1,2 polybutadiene. The latter polymer also exhibits an UCST with the 71 percent 1,2 polymer. The results are used to interpret the characteristics of blends of polybutadienes of varying microstructure.     

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。     

粉煤灰中烧失量检测的不确定度分析

以F类粉煤灰为例,详细介绍了测定粉煤灰中烧失量的步骤、计算数学模型、影响测量不确定度的因素以及各项测量不确定度分量评定,人员、设备、材料、方法、环境都是影响测量不确定的因素。     

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