硅强粉对炭黑填充NR胶料生热与导热性能的影响

研究了硅强粉对炭黑填充NR胶料生热与导热性能的影响。结果表明,当以每2份硅强粉部分替代1份N234炭黑时,可以使硫化胶的硬度基本保持不变,显示出硅强粉具有一定的补强作用,当其用量为20份以内时硫化胶可以保持良好的物理机械性能。随着硅强粉/炭黑并用比增加,硫化胶的损耗模量和损耗因子降低,滞后损失减少,导热系数增大。硅强粉降低了胶料的动态生热,提高了导热性,由此使得硫化胶压缩屈挠的中心温升、底部温升以及中心与底部温升的差值降低。     

新型纳米碳材G66在耐热输送带覆盖胶中的应用研究

通过使用新型纳米碳材G66替换炭黑N660用量，考察了耐热输送带覆盖胶胶料加工性能、力学性能、动态生热性能、导热性能和导电性能等的变化。结果表明，G66用量从0份增加到24份，混炼胶t₁₀和t₉₀基本保持不变，门尼粘度和硫化胶Shore A硬度均略有下降，拉伸强度、定伸应力、拉断伸长率、拉断永久变形和撕裂强度均变化不大，动态生热和表面电阻率均有所降低，导热系数增大；水泥物料对G66输送带的粘附性大幅降低，输送环境得到较大改善。     

新型纳米碳材G66在丁腈橡胶油封中的应用研究

通过逐量替代炭黑N550,研究了新型纳米碳材G66对NBR胶料硫化特性、力学性能、耐磨性能、动态力学性能、导热性能和导电性能的影响。结果表明,G66从0份逐渐增加到60份,NBR混炼胶扭矩差降低,t₁₀保持不变,t₉₀减小,门尼粘度略有下降;其硫化胶硬度及定伸应力均降低,拉断伸长率增大,拉伸强度基本保持不变;NBR油封制品动态生热有所降低,导热系数增大,表面电阻明显降低。     

硫酸钡在全钢子午线轮胎下三角胶中的应用

研究硫酸钡在全钢子午线轮胎下三角胶中的应用。结果表明：与生产配方胶料相比,试验配方胶料的F_L减小,F_max增大,表明试验配方胶料的交联密度增大;试验配方胶料的t₁₀和t₉₀的变化不大,硫化返原略快;与生产配方硫化胶相比,试验配方硫化胶的密度明显增大、邵尔A型硬度略增大、定伸应力相当、拉伸强度略减小,60℃时的损耗因子略减小,导热性能提高。在全钢子午线轮胎下三角胶中使用硫酸钡部分替代炭黑,对胶料性能影响不大,生产成本降低。     

类石墨烯对NR/BR硫化胶力学性能及动态生热性能影响

课题研究了新型类石墨烯材料SG3-G在普通输送带覆盖胶中的应用,通过对N330炭黑的替换,考察胶料的加工性能、物理机械性能、动态生热性能。结果表明：SG3-G从0份替代到20份,混炼胶的t₁₀和t₉₀延长,门尼黏度下降明显,硫化胶硬度、拉断强度和定伸应力略有下降,扯断伸长率和扯断永久变形变化不大,撕裂强度下降明显。同时动态生热有所降低。     

炭黑种类和用量对磁性丁腈橡胶性能的影响

研究炭黑种类和用量对磁性丁腈橡胶(NBR)胶料性能的影响。结果表明：分别将30份炭黑220,N330,N550,N660,N774和N990填充于磁性NBR胶料中,填充炭黑N660的磁性NBR混炼胶的Payne效应最弱(填料网络结构最稳定),填充炭黑N220的磁性NBR硫化胶的物理性能最佳,填充炭黑N550的磁性NBR硫化胶的磁性能最优[剩磁(B_r)为0.220 T,矫顽力(H_cb)为165 k A·m^-1,最大磁能积(BH)_max为9.3 k J·m^-3];分别将不同用量炭黑N550填充于磁性NBR胶料中,填充20份炭黑N550的磁性NBR混炼胶的尺寸稳定性最好,填充30份炭黑N550的磁性NBR硫化胶的拉伸强度最大(9.1 MPa),填充10份炭黑N550的磁性NBR硫化胶的磁性能最优[B_r为0.228 T,H_cb为171 k A·m^-1,(BH)_max为9.9 k J·m^-3...     

炭黑结构度及粒径变化对NBR动态生热及应力松弛的影响

研究了炭黑N220和炭黑N774结构度及粒径变化对NBR硫化胶动态生热及应力松弛的影响。结果表明,降低炭黑结构度且增大粒径,NBR胶料M_L和M_H均降低,t₁₀延长,同时还会加快硫化胶应力松弛过程,不可松弛分量和可松弛分量均降低。随着炭黑结构度降低、粒径增大和测试温度升高,硫化胶动态生热均有所降低。结合胶含量高的硫化胶低温Δtanδ变化较为明显。增大拉伸变形会提高应力松弛中不可松弛分量和可松弛分量。降低炭黑结构度、增大粒径且减小压缩变形量,硫化胶压缩应力松弛中可松弛分量减小。     

增硬补强剂在全钢载重子午线轮胎胎肩垫胶中的应用

研究增硬补强剂在全钢载重子午线轮胎胎肩垫胶中的应用。结果表明:胎肩垫胶中增硬补强剂的用量为1.5份,同时减小炭黑的用量,胶料的抗硫化返原性能显著提高,胶料的硫化特性和硫化胶的物理性能变化不大,硫化胶的压缩生热降低,成品轮胎耐久性能提高。     

类石墨烯材料在普通输送带覆盖胶料中的应用研究

研究了新型类石墨烯材料SG5在普通输送带覆盖胶料中的应用，并通过替换炭黑N660考察了胶料加工性能、力学性能、耐磨性能、动态生热、导热及导电性能。结果表明，SG5用量小于或等于20份时，并用胶t₁₀和t₉₀均略有缩短，M_H降低，门尼粘度在SG5/炭黑N660配用比为1∶1时最低；硬度、拉伸强度、拉断伸长率以及各级定伸应力均变化不大；60℃下动态剪切损耗模量G″和储能模量G′均略有降低，导热系数增大，表面电阻降低，耐磨性明显提升；SG5/炭黑N660用量为15份/5份时，耐磨性能最好。     

橡胶导热助剂的优选

探讨导热助剂和填料对胶料导热性能的影响。结果表明：导热增强剂TB-1对橡胶的补强作用和导热效应优于氧化锌、三氧化二铁、三氧化二铝,可以用作导热型补强助剂;用于轮胎胎侧胶和胎体胶,可以提高胶料的导热性能,对胶料物理性能影响不大;用于水胎胎体胶,可以提高水胎传热速度,缩短硫化时间,提高硫化效率,降低硫化能耗。不同种类的炭黑对胶料导热性能影响不同;炭黑用量增大,胶料的导热系数增大。     

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。     

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。     

三种煤样燃烧热的测定

本文通过三个厂家提供的三种煤样燃烧热的测定,由测定结果综合得出3号煤样燃烧最完全、燃烧热也最大,是三个煤样中最好的一种。     

Semi-empirical equation of state of metals. Equation of state of aluminum

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.     

小议汽车涂装工艺设计对涂装成本的影响

论述了涂装工艺设计对涂装设备投资、涂装生产成本的影响。     

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。     

Measurement of the gradient of viscosity with composition of mixtures of non-ideal gases

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%.     

Calorimetric and Computational Study of Enthalpy of Formation of Diperoxide of Cyclohexanone

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.     

塔设备改造选型的分析

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）。     

Effect of degree of deacetylation of chitin on the properties of chitin crystallites

In the present article, chitin from crab shell was systematically deacetylated using a NaOH treatment with control of the reaction time. The degree of deacetylation, monitored using solid-state NMR, revealed that the reaction was pseudo-first order. Based on this, swollen and NaOH-saturated particles are proposed as the reaction system. The weight loss of the partially saponified and neutralized samples after HCl hydrolysis increased linearly with the degree of deacetylation. The crystallinity of the samples was found to increase after acid hydrolysis. According to conductimetric titration, the surface charge density of the crystallites, after acid hydrolysis, was found to increase with base treatment time. The effect of surface charge on the formation of a chiral nematic phase, due to the rodlike nature of the crystallites, was explored. These results show that because the contribution of charged particles to the ionic strength was significant the double layer compression was affected, especially since the surface charge density was close to the Manning limit. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 65:373–380, 1997