共查询到20条相似文献,搜索用时 93 毫秒
1.
苯乙烯系热塑性弹性体的热氧老化 总被引:4,自引:0,他引:4
利用自制的热氧老化装置对苯乙烯系热塑性弹性体及其环氧化物进行了热氧老化研究,考察了不同结构、环氧度及防老剂对苯乙烯系热塑性弹性体耐老化性能的影响。结果表明,对双键进行环氧化增加了苯乙烯系热塑性弹性体的极性,改善了其黏接性能和耐老化性能。加入新型防老剂504的环氧化热塑性弹性体具有较好的抗老化效果。 相似文献
2.
综述了氢化苯乙烯类热塑性弹性体(氢化SEB)的特性、用途及制造工艺,介绍了国外氢化SEB生产厂家、国内科研开发现状,并提出了几点建议。 相似文献
3.
4.
对苯乙烯类热塑性弹性体的改性项目进行分析,结合苯乙烯类热塑性弹性体相关技术的使用特点,分析了多种改性方案,核心目的是通过重点技术的研究及分析,对苯乙烯类热塑性弹性体的应用进行探讨,提高苯乙烯类热塑性弹性体的改性使用效果,为行业的可持续发展提供参考。 相似文献
5.
综述了氢化苯乙烯类热塑性弹性体(氢化SEB)的特性、用途及制造工艺,介绍了国外氢化SEB生产厂家、国内科研开发现状,并提出了几点建议。 相似文献
6.
克莱伯格热塑性弹性体公司已经提出苯乙烯类热塑性弹性体的两个新型应用方向,即重叠注塑刚性热塑性弹性体工程塑料和消费类电子产品方面。据说这些产品具有极好的手触感特性和抗手汗、皮肤油脂、酒精清洗机、洗涤剂、紫外线和臭氧等特性。这两种产品都基于氢化苯乙烯嵌段共聚物(HSBCs), 相似文献
7.
8.
苯乙烯类热塑性弹性体的氢化 总被引:1,自引:0,他引:1
本文简介了氢化苯乙烯类热塑性弹性体基础聚合物的类型及其结构等因素对氢化产物物性的影响;对加氢催化剂和反应器的类型,加氢后催化剂的脱除,以及氢化SBS的生产,应用和消耗情况作了概述。 相似文献
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
13.
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.
醋酸纤维素取代基分布与性质的关系 总被引:9,自引:0,他引:9
分析了以吡啶为溶剂的醋酸纤维素的13C-NMR核磁共振谱,得出了三种不同位置羟基的取代度。结合X—射线和DSC分析,初步说明具有相同取代度但未经水解和经过水解的醋酸纤维素(CA) 性质上的差异是由于三个羟基上的取代度分布不同及消晶程度差异所致。 相似文献