共查询到20条相似文献,搜索用时 78 毫秒
1.
2.
试验研究填充剂Austin Black和IIR再生胶在全钢载重子午线轮胎气密层中的应用效果.结果表明,随着填充剂Austin Black用量的增大,硫化胶的拉伸强度和拉断伸长率有所降低,气密性明显提高;随着IIR再生胶用量的增大,硫化胶的拉伸强度和拉断伸长率略有下降,拉断永久变形稍有增大;添加10份填充剂Austin Black和30份IIR再生胶,硫化胶的气密性明显提高,其它物理性能变化不大,胶料的混炼和挤出工艺性能明显改善,成品轮胎性能良好.改进配方后,单胎成本降低约6.50元. 相似文献
3.
对不同比例ⅡR再生胶在无内胎子午线轮胎气密层胶料中的应用进行了试验研究,并探讨了应用的可能性及对气密性的影响。结果表明,在CHR/NR气密层胶料中加入30—40份丁基再生胶对其生胶及硫化胶的物理性能基本没有影响,气密性有所改善,胶料的成本降低。 相似文献
4.
5.
研究了丁基再生胶在无内胎斜交轮胎气密层胶中的应用效果。结果表明,随着丁基再生胶用量的增大,胶料的焦烧时间和正硫化时间逐渐缩短,在用量15份时,胶料的拉伸性能和气密性基本不受影响。加入丁基再生胶后,胶料的工艺性能得到了改善,压延胶片的收缩率降低,气泡减少,每千克混炼胶成本可降0.65元,经济效益显著。 相似文献
6.
7.
8.
9.
10.
11.
12.
13.
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。 相似文献
14.
15.
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 相似文献
16.
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. 相似文献
17.
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 相似文献
18.
19.
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. 相似文献
20.