白炭黑/炭黑并用比对轿车轮胎胎面胶性能的影响

探讨白炭黑/炭黑并用比对乳聚丁苯橡胶ESBR1721和溶聚丁苯橡胶SSBR Y837V2轿车轮胎胎面胶性能的影响.结果表明,用大应变下混炼胶的tanδ值确定的白炭黑/炭黑体系分散性与用炭黑分散性测试仪测得的结果一致,硫化胶滚动损失和侧向因数分别与粘弹谱仪测试的60和0 ℃时的tanδ值有较好的相关性.随着白炭黑/炭黑并用比的增大,ESBR1721和SSBR Y837V2硫化胶60 ℃时的tanδ值和滚动损失线性下降, 0 ℃时的tanδ值和侧向因数线性递增,耐磨性能略有下降.可根据胎面胶的性能要求,选取适合的白炭黑/炭黑并用比.     

环氧大豆油改性白炭黑对天然橡胶性能的影响

采用环氧大豆油(ESO)对白炭黑进行改性,研究ESO改性白炭黑对天然橡胶(NR)性能的影响。结果表明:采用ESO对白炭黑进行改性,ESO分子成功接枝到白炭黑粒子上;ESO改性白炭黑可以降低NR混炼胶的门尼粘度和动态模量,改善其加工性能;提高NR硫化胶的物理性能,降低NR硫化胶60℃时的损耗因子(tanδ)值、提高0℃时的tanδ值,从而降低动态生热、提高抗湿滑性能。     

白炭黑填充溶聚丁苯橡胶并用胶复合材料的性能对比研究

对比研究白炭黑填充溶聚丁苯橡胶(SSBR)以及SSBR并用顺丁橡胶(BR)、异戊橡胶和反式1,4-聚异戊二烯(TPI)所制备复合材料的性能。结果表明:经偶联剂Si69改性的白炭黑填充的SSBR/BR并用胶在低温下的损耗因子(tanδ)最大,在60℃下的tanδ值最小,耐磨性能最好,抗切割性能最差;白炭黑填充的SSBR/TPI并用胶在60℃下的tanδ值最大。     

炭黑和白炭黑填充环氧化反式-1,4-聚异戊二烯硫化胶的性能研究

首次研究了炭黑和白炭黑对水相悬浮法合成环氧化反式-1,4-聚异戊二烯(ETPI)硫化胶性能的影响。结果表明,炭黑对ETPI硫化胶的正硫化时间影响不大,而白炭黑对ETPI硫化胶的正硫化时间有明显的延迟效应;炭黑和白炭黑使ETPI硫化胶的100%定伸强度和撕裂强度明显提高,白炭黑填充的ETPI比炭黑填充的撕裂强度提高的幅度更大,并且随着加入份数的增加而增大,断裂伸长率和回弹值逐渐降低,邵尔A硬度逐渐增大;动态力学性能(DMA)测试显示,对于水相悬浮法合成的ETPI硫化胶,炭黑和白炭黑使40℃以上tanδ峰值明显提高,有利于阻尼材料宽温域的要求,但0℃时tanδ值逐渐下降,抗湿滑性降低;60℃时tanδ值上升,滚动阻力提高,对轮胎胎面胶的使用不利。     

国产集成橡胶SIBR基本性能的研究

研究了国产集成橡胶(SIBR)的基本性能,结果表明:SIBR与乳聚丁苯橡胶物理机械性能相当;其动态力学性能与通用乳聚丁苯橡胶相比,SIBR在0℃具有更高的tanδ值,在60℃具有更低的tanδ值,说明SIBR具有高抗湿滑性和低滚动阻力;压缩疲劳温升实验结果表明SIBR比丁苯橡胶压缩疲劳温升低,压缩永久变形率更小。实验证明SIBR是一种良好的轮胎胎面用橡胶。     

ESBR硫化胶交联结构及动态粘弹性在拉伸疲劳过程中的变化

研究炭黑和白炭黑填充乳聚丁苯橡胶硫化胶拉伸疲劳过程中交联结构和动态粘弹性的变化。结果表明,炭黑填充胶料的拉伸性能在拉伸疲劳次数低于50万次时下降明显,而白炭黑填充胶料在50万～100万次之间下降幅度较大;随着拉伸疲劳次数的增加,两种胶料的交联密度均减小;拉伸疲劳次数达到200万次时,炭黑填充胶料的tanδ峰宽明显增大,而白炭黑填充胶料在拉伸疲劳次数50万次以上tanδ峰就明显增高、增宽;炭黑填充胶料疲劳后高弹态的tanδ变化不大,而白炭黑填充胶料tanδ显著增大;白炭黑填充胶料的Payne效应较炭黑填充胶料大,且拉伸疲劳后Payne效应明显减小。     

改性锦纶短纤维在高性能轿车子午线轮胎胎面胶中的应用

研究改性锦纶短纤维在高性能轿车子午线轮胎胎面胶中的应用。结果表明:改性锦纶短纤维替代部分炭黑后,混炼胶的硫化速度加快,焦烧时间缩短;硫化胶的密度减小,压缩疲劳温升降低,60℃的损耗因子(tanδ)减小,撕裂强度增大,但拉伸强度和耐磨性能有所下降,且变化趋势随着改性锦纶短纤维用量的增大而增大。采用6份改性短纤维替代4份炭黑用于胎面胶配方,胶料的温升降低1~2℃,60℃的tanδ值减小;成品轮胎的高速和耐久性能均提高,滚动阻力降低。     

绿色轮胎用低滞后炭黑性能的研究

研究X系列低滞后炭黑的结构和功能及其对胶料性能的影响,并与传统炭黑N234进行对比。结果表明：与炭黑N234相比,低滞后炭黑X2008和X2009的粒径更大,结构更高,着色强度更低,具有较宽的聚集体尺寸分布和较高的表面活性;在胎面胶中以低滞后炭黑X2008和X2009等量替代炭黑N234,硫化胶的综合性能改善,生热降低,0 ℃时的损耗因子（tan δ ）相当,60 ℃时的tan δ 降低,表明胶料的抗湿滑性能相当,滚动阻力降低。     

丁苯橡胶1739在绿色环保轿车子午线轮胎胎面胶中的应用

试验研究丁苯橡胶(SBR)1739在绿色环保轿车子午线轮胎胎面胶中的应用。结果表明:在胎面胶配方中用SBR1739等量替代SBR1723,并调整炭黑/白炭黑并用比以及硅烷偶联剂和促进剂的用量,胶料的门尼粘度增大,300%定伸应力提高,拉断伸长率降低,压缩生热和滚动阻力大幅降低,其他物理性能变化不大;0℃下损耗因子(tanδ)增大,而60℃下tanδ减小,符合绿色环保轮胎胎面胶的性能要求。试制的205/60R15 91V轿车子午线轮胎强度、耐久和高速性能良好,湿牵引性能和操控性能极佳,油耗低。     

炭黑/白炭黑并用增强NR/SSBR复合材料的结构与性能

研究白炭黑的用量5-15份,等量替代炭黑时,对NR/SSBR复合材料结构与性能的影响。白炭黑的用量为15份时,结合胶的含量最高;RPA,DMTA和TEM结果表明：白炭黑的用量为15份时,填料的分散最均匀;而且15份的白炭黑还一定程度提高了NR和SSBR的相容性。白炭黑的用量为5-10份时,NR/SSBR复合材料的拉伸强度、撕裂强度和拉断永久变形变化不大;白炭黑的用量为15份时,NR/SSBR复合材料的拉断伸长率和邵尔A硬度有所降低,300%定伸应力有所提高。在60℃下的tanδ和动态压缩温升最低,阿克隆磨耗量有所增加。     

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%.     

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）。     

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.     

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