SSBR T2535L在轻型载重斜交轮胎胎面胶中的应用

研究溶聚丁苯橡胶(SSBR)T2535L在轻型载重斜交轮胎胎面胶中的应用.结果表明,与乳聚丁苯橡胶(ESBR)1712胶料相比,SSBR T2535L胶料的门尼粘度较高,硫化速度较快,硫化胶的300%定伸应力和拉伸强度略小,耐磨性能较好.采用SSBR T2535L生产的轮胎性能优于采用ESBR1712生产的轮胎.     

溶聚丁苯橡胶在绿色轮胎胎面胶中的应用

研究不同牌号溶聚丁苯橡胶(SSBR)在绿色轮胎胎面胶中的应用。结果表明:与牌号为VSL 4526-2HM的SSBR相比,牌号为VSL 2438-2HM,VSL PBR 4078和VSL PBR 4070的SSBR加工性能略差,其硫化胶的物理性能相对较好;末端改性SSBR(牌号为VSL PBR 4078和VSL PBR 4070)硫化胶的滚动阻力较小,抗湿滑性能较好。     

白炭黑及溶聚丁苯橡胶在轿车轮胎胎体胶中的应用

研究白炭黑替代炭黑、溶聚丁苯橡胶(SSBR)替代乳聚丁苯橡胶(ESBR)在轿车轮胎胎体胶中的应用。结果表明:用白炭黑替代炭黑,胶料的门尼粘度增大,焦烧时间和正硫化时间延长,硫化速率减慢;用SSBR替代ESBR,炭黑体系胶料与白炭黑体系胶料的硫化特性变化完全不同,SSBR更适用于白炭黑体系;用白炭黑替代炭黑,胶料的强伸性能、抗撕裂性能和耐疲劳性能显著提高,生热明显降低,SSBR/白炭黑胶料综合性能优于ESBR/白炭黑胶料;用白炭黑替代炭黑,胶料老化前后的H抽出力差异不大,但是抽出帘线表面附胶量明显不同。     

端基改性溶聚丁苯橡胶对应用性能的提高

以溶聚丁苯橡胶(SSBR)Buna VSL4526、T3830、巴陵石化端基改性产品SSBR3343S和SSBR2563S为基体,以白炭黑为补强剂,对比研究4种胶料的硫化特性、物理性能、动态力学性能、耐磨性能和抗湿滑性能。结果表明,与Buna VSL4526、T3830胶料相比,端基改性的SSBR2563S和SSBR3343S白炭黑填充胶料的硫化速度快、操作安全性较好;硫化胶的物理机械性能、耐磨性能和抗湿滑性能较优。     

不同牌号溶聚丁苯橡胶在轮胎胎面胶配方中的应用试验

采用橡胶加工分析仪、动态热机械分析仪等手段,从加工性能、物理机械性能、耐磨性、Payne效应、动态力学性能等方面系统分析对比了不同牌号溶聚丁苯橡胶在轮胎胎面胶中的应用效果。结果表明,使用牌号为SL 563 R、NS 616和SSBR 2300的溶聚丁苯橡胶所制备胎面胶的加工性能较好,SSBR 2353的硫化速率较快,HP 755 R的硫化速率较慢;RC 2564 S和NS 616的耐磨性较好;SL 553 R、SE-3231、SSBR 2353和SSBR 2300可用于低温轮胎胎面胶的开发;HP 755 R的抗湿滑性能最好;NS 616、SE-3231和SL 563 R可用于要求综合性能较好的配方中;RC 2564 S和SSBR 2300不适用于制备夏季胎胎面胶。     

溶聚丁苯橡胶种类对高填充白炭黑/溶聚丁苯橡胶复合材料性能的影响

研究端基改性和多官能化主链改性溶聚丁苯橡胶（SSBR）对高填充白炭黑/SSBR复合材料性能的影响。结果表明：4种SSBR胶料的门尼粘度基本相同;与端基改性SSBR相比,多官能化主链改性SSBR胶料的焦烧时间延长,硫化胶的硬度和定伸应力减小,填料分散性改善,Payne效应减弱,同时胶料的损耗因子明显降低。     

SSBR1534在轮胎胎面胶中的应用

研究溶聚丁苯橡胶(SSBR)1534等量替代乳聚丁苯橡胶(ESBR)1712在斜交轮胎和半钢子午线轮胎胎面胶中的应用.试验结果表明,以SSBR1534等量替代ESBR1712,胶料的门尼焦烧时间t5和t90缩短,硫化胶的弹性、耐磨性能和耐疲劳性能提高,压缩温升下降;成品轮胎的耐久性能、高速性能和耐磨性能提高.     

国产高乙烯基溶聚丁苯橡胶在轮胎胎面胶中的应用

研究国产高乙烯基溶聚丁苯橡胶（HV—SSBR）标准配方和胎面胶配方胶料的性能,并与国外进口溶聚丁苯橡胶（JK—SSBR）进行比较。结果表明：与JK—SSBR相比,HV-SSBR的相对分子质量较小,含胶率较高;标准配方胶料的焦烧时间较长,硫化速度较快,物理性能和滚动阻力性能较差;胎面配方胶料的焦烧时间较短,硫化速度较快,物理性能和动态力学性能较好,可用于高性能轿车子午线轮胎胎面胶。     

国产SSBR在轿车子午线轮胎胎面胶中的应用

试验研究国产溶聚丁苯橡胶(SSBR)T2535L在轿车子午线轮胎胎面胶中的应用.结果表明,采用SSBR T2535L部分替代乳聚丁苯橡胶(ESBR)用于轿车子午线轮胎胎面胶,胶料的自粘性、成团性和尺寸稳定性好,胶料表面光滑且富有光泽;硫化胶的撕裂强度、回弹值和磨耗量增大,拉断伸长率略有减小;成品轮胎滚动阻力降低,抗湿滑性能变化不大,生产成本降低.     

溶聚丁苯橡胶牌号切换对轮胎胎面接头缺胶的影响

试验研究溶聚丁苯橡胶(SSBR)牌号切换对轮胎硫化胎面接头缺胶的影响。研究表明,在半钢子午线轮胎胎面体系中,以SOL 6270M等量替换RC2557S,若保证胎面胶门尼流变等加工性能,则流动性下降,引起胎面接头缺胶。通过调整混炼工艺,提高胶料的流动性,成品轮胎硫化外观得到有效改善。     

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。     

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     

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     

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.