白炭黑与溶聚丁苯橡胶的键接位置对白炭黑/炭黑/溶聚丁苯橡胶复合材料性能的影响

研究白炭黑/炭黑填充星形溶聚丁苯橡胶(SSBR)和分子链自由末端用硅氧烷基团封端改性星形SSBR(S-SSBR)的物理性能、动态力学性能和微观结构。结果表明:随着偶联剂用量(硅氧烷基团物质的量)的增大,星形SSBR复合材料的拉伸强度先增大后减小,S-SSBR复合材料的拉伸强度先减小后增大;星形SSBR和S-SSBR复合材料的300%定伸应力呈增大趋势,压缩疲劳温升降低,0℃下损耗因子(tanδ)增大,60℃下tanδ值减小。当复合材料中硅氧烷基团的物质的量相同时,与星形SSBR复合材料相比,S-SSBR复合材料定伸应力和0℃下tanδ值的增幅、压缩疲劳温升和60℃下tanδ值的降幅较大,填料的分散性较好。     

充环烷油溶聚丁苯橡胶在胎面胶配方中的应用

研究充环烷油溶聚丁苯橡胶(SSBR)在胎面胶配方中的应用.结果表明:与天然橡胶(NR)硫化胶相比,SS-BR硫化胶0℃下的损耗因子(tanδ)较大、60℃下的tanδ较小,用于胎面胶中可赋予轮胎较高的抗湿滑性能和较低的滚动阻力;SSBR与NR具有良好的相容性,当SSBR/NR并用比为20/80时,硫化胶综合物理性能良好;SSBR用于胎面胶中可提高轮胎的抗湿滑性能、干路面和冰路面的抓着力,降低滚动阻力,适用于高性能轮胎.     

高湿抓抗湿滑性载重轮胎胎面配方的研究

研究溶聚丁苯橡胶（SSBR）在载重轮胎抗湿滑胎面配方中的应用。结果表明：在胎面配方中,随着SSBR等量替换天然橡胶（NR）的用量提高,胶料的300%定伸应力和拉伸强度下降,t90下降,焦烧时间延长,撕裂强度下降,耐磨性下降,生热提高,损耗因子tanδ提高;当天然橡胶（NR）/溶聚丁苯橡胶（SSBR）并用比为70/30时,硫化胶的物理性能、动态性能和抗湿滑性能好,适用于载重轮胎胎面。     

SSBR改善胎面胶动态力学性能的研究

考察了不同种类和不同用量的SSBR在轮胎胎面胶中的应用,研究了NR／SSBR硫化橡胶的物理机械性能和动态力学性能。结果表明：天然橡胶与新型溶聚丁苯橡胶SSBR2并用比为70／30时。硫化橡胶具有优异的动态力学性能和较低压缩生热;DMA测试结果表明：随着SSBR2的加入,硫化橡胶0℃时的tanδ值逐渐增大,60℃时的tanδ值减小。实验表明：加入适量SSBR2能够满足胎面胶基本物理性能要求,而且具有较低生热和较好的抗湿滑性。     

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。     

两种溶聚丁苯橡胶在轮胎胎面胶中的应用

研究低结合苯乙烯和高乙烯基含量溶聚丁苯橡胶（SSBR） E680与高结合苯乙烯和低乙烯基含量SSBR HP755R在轮胎胎面胶中的应用。结果表明，与SSBR HP755R胶料相比，SSBR E680胶料的焦烧时间和t90缩短；SSBR E680硫化胶的300%定伸应力和拉伸强度略大；两种胶料挤出工艺性能无明显区别；SSBR E680胶料在0 ℃时的损耗因子（tanδ）略大，在60 ℃时的tanδ略小，表明SSBR E680胶料的抗湿滑性能较好、生热和滚动阻力较低。     

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.     

白炭黑用量对溶聚丁苯橡胶/稀土顺丁橡胶并用胶性能的影响

研究不同白炭黑用量对溶聚丁苯橡胶（SSBR）/稀土顺丁橡胶（NdBR）并用胶性能的影响。结果表明：在SSBR/NdBR并用体系中,随着白炭黑用量的增大,胶料的门尼粘度、FL和Fmax增大,门尼焦烧时间和t10缩短,t90延长;硫化胶的硬度和100%定伸应力增大,拉断伸长率、回弹值、DIN磨耗指数和动态切割量呈减小趋势,拉伸强度和撕裂强度先增大后减小,在白炭黑用量为80份时达到最大值;硫化胶的玻璃化温度呈降低趋势,0 ℃时的损耗因子（tanδ）先增大后减小,60 ℃时的tanδ增大;胶料的Payne效应增强,白炭黑分散性下降;硫化胶的湿地抓着性能先提高后降低,当白炭黑用量为110份时达到最佳。     

钼系高乙烯基聚丁二烯橡胶部分替代溶聚丁苯橡胶胎面胶性能的研究

对钼系高乙烯基聚丁二烯橡胶(HVBR)部分替代轮胎胎面胶中两种结构的溶聚丁苯橡胶(SSBR2466和SSBR6270M)进行研究。结果表明:与以SSBR2466为主的胶料相比,以SSBR6270M为主的胶料的综合性能更好;采用HVBR部分替代SSBR6270M,胶料的t_(10)和t_(90)缩短,硫化胶的压缩疲劳性能和耐磨性能提高,生热和滚动阻力明显降低,抗湿滑性能和耐老化性能相差不大。     

双驱动同步齿轮泵式滤胶机滤网过滤对溶聚 丁苯橡胶/顺丁橡胶并用胶性能的影响

研究经双驱动同步齿轮泵式滤胶机滤网过滤的溶聚丁苯橡胶（SSBR）/顺丁橡胶（BR）并用胶的性能变化以及滤网孔径对SSBR/BR并用胶性能的影响。结果表明：经滤胶机滤网过滤后,SSBR/BR并用胶的硫化特性和物理性能改善;随着滤网孔径的减小,SSBR/BR并用胶的邵尔A型硬度、100%定伸应力、300%定伸应力、拉伸强度、拉断伸长率和撕裂强度都呈先增大后减小的趋势,Payne效应越来越弱;滤网孔径为75μm时,SSBR/BR并用胶的拉伸强度和撕裂强度最大,分别比未过滤的SSBR/BR并用胶增大27.5%和33.3%,耐屈挠性能最好,损耗因子（tanδ）峰值最大,玻璃化温度最高,60℃时的tanδ最小,滚动阻力最低。     

关于逆流冷却塔雨区阻力计算的探讨

在逆流式冷却塔的空气阻力计算中,常常忽略了雨区阻力的计算,包括国标规范与高等教育的教科书等权威文献也未提及,根据工业塔的实测,这部分阻力占全塔空气阻力的1/6左右。本文根据冷却塔设计与运行的实践,并结合国内外学者对此的实验研究成果,经分析总结,给出了一个较为系统可行的计算方法,经验证与工业塔实测基本吻合,可供冷却塔设计中参考使用。     

耐高温尼龙聚邻苯二甲酰胺的研究进展

综述了聚邻苯二甲酰胺(PPA)的特性和应用,对部分PPA新品种制备方法及表征测试作了介绍,还介绍了PPA在耐热性、吸水性、尺寸稳定性、耐焊锡性等方面的研究进展。     

Improving the bending and corrosion resistance of an enamel by the addition of β-Si3N4 whiskers

Enamel–metal composite materials with high strength and corrosion resistance are often used for fabricating enameled pressure vessels for pharmaceutical and chemical production. However, the low bending resistance of the enamel can result in the cracking and delamination of the enamel layer, leading to the loss of corrosion resistance of the enameled pressure vessel, which can result in accidents. Here, based on the goal of increasing the bending resistance of the enamel to prolong its service life, the effect of β-Si₃N₄ whiskers on the mechanical properties of enamel was studied by three-point bending tests. The effect of β-Si₃N₄ whiskers on the acid and alkali corrosion resistance of enamel was studied using aqueous H₂SO₄ and NaOH solutions, respectively. A sudden change in the force of an enameled sample under the three-point bending test was used to evaluate the bending resistance of the enamel–metal samples, and can also be used to evaluate the mechanical properties of other comparable materials. With the addition of 0.5 wt% β-Si₃N₄ whiskers, the bending resistance was significantly improved, along with the acid and alkali corrosion resistance. These findings are expected to provide guidance for the design and production of enamel-metal vessels with improved performance that can significantly lengthen the service life of enameled pressure vessels and reduce the occurrence of accidents.     

电阻器专用涂料(Ⅰ)

介绍了电阻涂料底漆、面漆的种类和各类电阻涂料底漆和面漆的组成、特点及技术规格。同时,还简介了环氧型、油墨型及有机硅型标志涂料的特点和技术指标。     

Effect of partial substitution of alumina–chromium slag for Al2O3 on microstructures and properties of Al2O3–SiC–C trough castables

Alumina–chromium slag (ACS), a cheap and abundant refractory raw material comprising aluminum–chromium oxides and β-Al₂O₃, is a byproduct of ferrochrome smelting. For this reason, we investigated the relationships between composition and mechanical properties, abrasion resistance, oxidation resistance, and resistance to iron slag erosion for Al₂O₃–SiC–C trough castables in which ACS was substituted for alumina. Due to the presence of β-Al₂O₃ in ACS, the aluminum-chromium slag reacted with SiO₂ to form a low-melting phase of albite and promoted the formation of mullite, which filled the pores at high temperatures and reduced the porosity, thereby promoting densification and strengthening of the sample. The cold mechanical properties of the sample and the normal temperature wear resistance were enhanced, but the high-temperature mechanical properties and the resistance to iron slag corrosion of the sample were impaired. According to the results of the anti-oxidation experiment, the presence of β-Al₂O₃ in the ACS reduced the porosity and made the sample more dense, which remarkably improved oxidation resistance of the sample. For industrial production requirements, ACS substitution should not exceed 48?wt% due to of thermomechanical properties and anti-slag corrosion performance in Al₂O₃–SiC–C trough castables.     

Enhancement of thermal shock and slag corrosion resistance of MgO–ZrO2 ceramics by doping CeO2

The purpose of this paper was to develop ceramics materials with high thermal shock resistance and corrosion resistance for preparing gas blowing components. In this paper, MgO-rich MgO–ZrO₂ ceramics were obtained by using MgO powder and ZrO₂ powder as starting materials and CeO₂ as an additive. Changes in the properties in terms of thermal shock resistance, mechanical properties, and slag corrosion-resistance with chemical compositions were examined correlated to microstructure and phase changes. Especially, the effect of doping CeO₂ on phase transition of zirconia in MgO-rich system was discussed. The results showed that doping amount of CeO₂ significantly improved properties of MgO–ZrO₂ ceramics. Especially when doping amount of CeO₂ was 2 wt%, residual strength ratio was enhanced over 100% after thermal shock testing. In samples doped with CeO₂, ZrO₂ was stable in cubic or tetragonal form due to complete solution of CeO₂, which was important reason for the improvement of various properties of MgO–ZrO₂ ceramics.     

氧化镁-尖晶石浇注料的组成与性能的关系

以中档烧结镁砂、矾土基尖晶石和电熔白刚玉为主要原料,制备了不同基质组成的试样,并研究了浇注料的流动性、强度、永久线变化率、抗渣性和抗热震性。结果表明：基质的组成（特别是Ａｌ２Ｏ３／ＭｇＯ比）对浇注料的抗渣性、线变化率、抗剥落性和热震稳定性有显著影响,通过调整Ａｌ２Ｏ３／ＭｇＯ比可制得综合性能优良的氧化镁－尖晶石浇注料     

硅树脂及其涂料的研究新进展

综述了近十年来国内外耐热、耐腐蚀、耐候性硅树脂、改性硅树脂及其涂料的研究新进展；指出了硅树脂及其涂料的发展趋势。     

钢骨架塑料复合管的性能和应用

对钢骨架塑料复合管与其他管道的性能进行了比较,对比结果证明:钢骨架塑料复合管具有耐压、耐磨、耐腐蚀、抗蠕变、安装方便以及较高的性价比等特点。     

无醛防皱整理剂的研究进展

传统的防皱整理的发展历程及面临的新问题，阐述了多元羧酸类防皱整理剂作为棉织物理想的无甲醛防皱整理剂的防皱机理及性能，但由于它存在价格贵、织物泛黄色变、耐洗牢度差、含磷催化剂污染环境等问题，需要有效解决。最后，指出了无醛防皱整理今后的发展方向。