共查询到20条相似文献,搜索用时 93 毫秒
1.
2.
纳米碳酸钙在轮胎内胎与内衬层中的应用 总被引:1,自引:1,他引:1
研究纳米碳酸钙在IIR内胎和子午线轮胎CIIR内衬层中的应用。结果表明,在IIR内胎胶料中使用纳米碳酸钙部分替代炭黑,硫化胶的物理性能稍有降低,耐屈挠性能和透气率变化不大;在子午线轮胎CIIR内衬层胶料中使用纳米碳酸钙部分替代炭黑,胶料的焦烧时间和正硫化时间有所延长,硫化胶的物理性能有所提高,耐屈挠性能和透气率变化不大。 相似文献
3.
据中国橡胶工业协会力车轮胎分会预测,今后5~1 0年中国力车轮胎(自行车、摩托车和手推车轮胎)内胎丁基化步伐将加快。中国目前自行车轮胎内胎丁基化率仅2 6% ,与世界先进水平相比有较大差距。内胎丁基化早已是世界潮流,欧美和日本等经济发达地区内胎已完全丁基化,印度的内胎丁基化率达到90 % ,印度尼西亚、泰国、马来西亚也达到70 % ,菲律宾达40 %。中国自行车轮胎内胎和摩托车轮胎内胎丁基化率低有多方面的原因:一是IIR主要依靠进口,价格贵,造成IIR内胎生产成本远高于NR内胎;二是工艺技术掌握慢;三是推介宣传不力;四是市场混乱。目前… 相似文献
4.
力车轮胎内胎粗细不匀的解决办法邓洪(江苏飞驰股份有限公司,盐城224002)1力车轮胎内胎粗细不匀现象的产生原因力车轮胎内胎由于胎壁薄、长径比大,硫化充气后容易产生粗细不匀。目前市场上力车轮胎内胎多以彩色为主,胶料的定伸应力较低,扯断伸长率也大,致使... 相似文献
5.
研究国产星型支化丁基橡胶S-IIR1451混炼胶的门尼松弛性能、流变性能、硫化特性以及硫化胶的物理性能和耐热氧老化性能,并与进口IIR301胶料进行对比;以S-IIR1451为原材料批量制作了半钢轮胎和全钢轮胎用硫化胶囊进行轮胎生产的实际应用评价,并与IIR301商用硫化胶囊进行应用对比。结果表明:与IIR301胶料相比,S-IIR1451胶料的加工性能相近,但具有更低的挤出胀大比,硫化胶的物理性能和耐热氧老化性能均更优;采用S-IIR1451胶料制作的硫化胶囊表现出更优异的耐热氧老化性能,使用寿命比采用IIR301胶料的硫化胶囊提高20%以上。 相似文献
6.
7.
8.
9.
10.
11.
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
12.
D. G. Gordeev L. F. Gudarenko M. V. Zhernokletov V. G. Kudel’kin M. A. Mochalov 《Combustion, Explosion, and Shock Waves》2008,44(2):177-189
A semi-empirical equation of state for metals is described. Its capabilities are demonstrated by the example of the equation
of state for aluminum. New experimental data are presented on the location of the isentrope of aluminum for unloading from
the state at p = 229.71 GPa on the shock adiabat to an aerogel (SiO2) of density 0.08 g/cm3.
__________
Translated from Fizika Goreniya i Vzryva, Vol. 44, No. 2, pp. 61–75, March–April, 2008. 相似文献
14.
15.
16.
Jorge Marcelo Romero Soledad Bustillo Hugo Enrique Ramirez Maisuls Nelly Lidia Jorge Manuel Eduardo Gómez Vara Eduardo Alberto Castro Alicia H. Jubert 《International journal of molecular sciences》2007,8(7):688-694
A thermochemical rather simple experimental technique is applied to determine the enthalpy of formation of Diperoxide of ciclohexanone. The study is complemented with suitable theoretical calculations at the semiempirical and ab initio levels. A particular satisfactory agreement between both ways is found for the ab initio calculation at the 6–311G basis This set level. Some possible extensions of the present procedure are pointed out. 相似文献
17.
18.
19.
A perturbation viscometer is a differential capillary viscometer that measures the logarithmic viscosity gradient of the viscosity-composition curve for gas mixtures. Measurements are made at different gas mixture compositions. Integration of the logarithmic viscosity gradients measured over the full composition range gives the mixture viscosity relative to the viscosity of one of the pure components of the gas mixture. This method is attractive because, for measurements of equal precision, integration of the gradients is potentially an order of magnitude more precise than measurement of the viscosities directly. It can also work at high and low temperatures and perhaps high pressures.The perturbation viscometer has been used to make measurements on ideal gas mixtures at ambient and elevated temperatures. The situation is more complicated when the gas mixtures are non-ideal. Extra effects due to density differences, molar volume change on mixing and differential thermal expansion may be measured in addition to the desired viscosity change producing systematic errors in the results. Thus, a more sophisticated apparatus is required. The standard perturbation viscometer has been modified to separate out the extra effects to permit measurement of the true change in viscosity. In addition, the theoretical operation of the modified apparatus has been revised to account for the design changes to permit calculation of the viscosity-composition profiles from the results.The apparatus has been tested using helium-HFC-125 mixtures and two new viscosity-composition profiles are presented for these mixtures at 23 and . Internal consistency tests have been used to confirm that the data produced are of high quality with an estimated uncertainty in the viscosity ratio data at of 0.9% and at of 1.5%. 相似文献
20.
塔设备改造选型的分析 总被引:2,自引:0,他引:2
就当前扩产增容中塔设备设计和改造时板式塔和填料塔的选型问题加以分析。在评述目前国内常用的几种塔板和新型填料之后,着重介绍一种新型塔板(导向梯形浮阀塔板)和一种新型填料(波环填料——乾隆帕克)。 相似文献