国产BIIR在全钢载重子午线轮胎气密层胶中的应用

研究国产BIIR在全钢载重子午线轮胎气密层胶中的应用。结果表明：在全钢载重子午线轮胎气密层胶中,使用国产BIIR等量替代进口BIIR,胶料门尼焦烧时间、硫化特性、拉伸性能等主要性能相近、气密性能略优,可以满足正常生产和轮胎使用性能要求;同时可以降低胶料成本约1.56元/kg,经济效益十分显著。     

国产溴化丁基橡胶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)在全钢载重子午线轮胎气密层胶中的应用。结果表明:与进口BIIR相比,国产BIIR的挥发物质量分数和灰分质量分数较小;与进口BIIR气密层胶相比,国产BIIR气密层胶的门尼焦烧时间、硫化特性、物理性能、耐屈挠性能和耐热老化性能相当,气密性略好,可以满足气密层胶的需求;国产BIIR性价比高,经济效益显著。     

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。     

EXXPRO在全钢子午线轮胎气密层胶中的应用

研究溴化丁基橡胶（BIIR）EXXPRO在全钢子午线轮胎气密层胶中的应用。结果表明：在全BIIR或BIIR/天然 橡胶并用气密层胶中以EXXPRO1603等量替代BIIR2222，胶料的交联程度和加工安全性提高，硫化胶的物理性能变化不 大，高温条件下的气密性显著提高。     

子午线轮胎气密层生产线研制成功

子午线轮胎气密层生产线研制成功机械工业部合肥通用机械研究所研制的ＴＺＸＪ－１型子午线轮胎气密层（型胶）生产线于１９９３年在安徽轮胎厂调试成功，投入运行。该生产线是生产钢丝子午线轮胎气密层（单层、多层复合、薄胶片等）型胶胶片的关键设备，过去全靠进口，投...     

星形支化溴化丁基橡胶在全钢载重子午线轮胎气密层中的应用

研究星形支化溴化丁基橡胶（BIIR）6222在全钢载重子午线轮胎气密层中的应用,并与传统BIIR2222进行对比。结果表明：与BIIR2222胶料相比,BIIR6222胶料的加工性能较好,焦烧时间延长;硫化胶的耐热老化性能和耐臭氧性能优异,气密性能提高;成品轮胎的耐久性能提高。     

均匀剂RH-100在全钢载重汽车子午线轮胎气密层胶中的应用

研究采用国产均匀剂RH-100等量替代进口均匀剂UB4000对全钢载重汽车子午线轮胎气密层胶性能的影响。结果表明：采用2种均匀剂胶的性能基本相当,国产均匀剂RH—100可以替代进口均匀剂UB4000用于全钢载重汽车子午线轮胎气密层胶中。     

全钢工程机械子午线轮胎气密层裂缝解决方案

针对大中型全钢工程机械子午线轮胎在高温地区使用时易产生气密层裂缝等问题进行研究。简要分析其产生机理,并将气密层胶料配方由溴化丁基胶(BIIR)/天然橡胶并用体系调整为全BIIR为主体的配方,同时优化配方炭黑用量,以提升气密层胶料的耐老化和耐屈挠性能,有效解决了高温地区轮胎气密层裂缝问题。     

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.     

粘土/丁苯橡胶纳米复合材料在半钢子午线轮胎气密层胶中的应用

研究粘土/丁苯橡胶（SBR）纳米复合材料等量代替溴化丁基橡胶（BIIR）在半钢子午线轮胎气密层胶中的应用。结果表明：粘土/SBR纳米复合材料制备的气密层胶交联密度大,物理性能提高,气密性明显改善;在胎坯成型二段充气时炸胎率明显减小;成品轮胎气压保持率大,速度性能和耐久性能均符合企业标准要求。与BIIR气密层胶相比,粘土/SBR纳米复合材料气密层胶成本较低,密度较大,厚度可以适当减小。     

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