3种增塑剂对氯磺化聚乙烯橡胶性能的影响

研究增塑剂TOTM,TP-95和TP-90B对氯磺化聚乙烯橡胶性能的影响,并与增塑剂DOP进行对比。结果表明:加入增塑剂TP-95和TP-90B的胶料t90缩短,而加入增塑剂TOTM的胶料t90延长;加入增塑剂TP-90B的硫化胶物理性能较好;增塑剂TOTM具有更好的热稳定性;加入增塑剂可提高硫化胶的低温脆性,增塑剂TP-95硫化胶的低温脆性最佳;加入增塑剂会降低硫化胶的阻燃性能,增塑剂TP-90B硫化胶的阻燃性能下降程度最小。     

增塑剂TP-95和TP-90B对丁腈橡胶性能的影响

研究了增塑剂TP-95和TP-90B对丁腈橡胶(NBR)低温性能、硫化特性、力学性能和老化性能的影响.并与常用增塑剂DOA,DOP进行对比.结果表明,添加含醚基的TP-90B和含醚酯基的TP-95使NBR硫化胶的玻璃化温度明显降低,低温拉伸性能和低温脆性性能优于DOA和DOP.TP-90B和TP-95对胶料硫化有一定的促进作用.硫化胶的100%和300%定伸应力较高.TP-95在热空气老化条件下具有良好的热稳定性,而TP-90B较易挥发.     

环保醚酯类增塑剂RPL-1与其他增塑剂对丙烯酸酯橡胶性能的影响对比

对比研究了环保醚酯类增塑剂RPL-1和几种常用增塑剂对丙烯酸酯橡胶(ACM)门尼黏度、硫化特性、物理机械性能、耐热性、耐低温性及耐油性的影响。结果表明,当增塑剂用量均为15份时,RPL-1比邻苯二甲酸二辛酯(DOP)的增塑效果更佳,添加RPL-1的ACM胶料的门尼黏度低,硫化胶的邵尔A硬度和100%定伸应力小,扯断伸长率和弹性高,耐低温性能优良;与己二酸二辛酯(DOA)相比,添加RPL-1的ACM硫化胶的耐热稳定性高,热空气老化后的物理机械性能变化率小,压缩永久变形大;RPL-1、己二酸二(丁氧基乙氧基乙)酯(TP 95)与ACM的相容性优于DOA和DOP,添加前两者的ACM硫化胶无喷油现象,且性能相当。     

环保醚酯型增塑剂TP-95在PVC中的应用

研究了环保醚酯型增塑剂TP-95和几种常用增塑剂对聚氯乙烯(PVC)的塑化效果、力学性能、耐寒性、耐热性及耐抽出性能的影响。结果表明:与添加的几种增塑剂相比,TP-95具有显著的增塑软化作用;随着增塑剂用量的增加,最低转矩明显下降,塑化时间缩短,塑化效果随之增强;与DOP和TOTM相比,TP-95表现出良好增塑效应及耐寒性;增塑剂用量均为50份时,TP-95的PVC开始热降解温度高于DOP和DOA;在水和环己烷介质中,随着随着增塑剂用量的增加,抽出损失随之增加;在环己烷介质中,TP-95的抽出损失为4.40%,低于TOTM和DOA,具有良好的耐抽出性。     

环保增塑剂在丁腈橡胶中的应用

系统研究环保增塑剂TP-95,TP-90B,BXA-R,TOTM和DOTP对丁腈橡胶(NBR)综合性能的影响,并与常用的增塑剂DBP进行对比。结果显示:与增塑剂DBP相比,添加增塑剂TP-95和TP-90B的混炼胶的门尼粘度低,增塑效果最佳,耐低温性能优良;添加增塑剂TOTM的硫化胶的耐热性优良,压缩永久变形和热老化后物理性能变化率较小;添加增塑剂BXA-R的硫化胶的综合性能最佳,既具有良好的耐热性能,又具有较好的耐低温和耐油性能。     

环保醚酯类增塑剂RPL-1在NBR中的应用

试验研究环保醚酯类增塑剂RPL-1对NBR胶料性能的影响,并与几种常用增塑剂进行对比。结果表明,增塑剂RPL-1的增塑效果与增塑剂DOA,DOS和TP95相近,明显优于增塑剂DOP,且热稳定性较好;其硫化胶的耐寒性能与增塑剂DOA硫化胶相近,物理性能、耐热空气老化性能及耐油性能均与增塑剂TP95硫化胶接近。     

环保型增塑剂ATBC在NBR中的应用研究

研究了乙酰柠檬酸正三丁酯(ATBC)对丁腈橡胶混炼胶硫化特性和硫化胶力学性能的影响,并与增塑剂邻苯二甲酸二辛酯(DOP)的增塑性能进行了对比。结果表明,添加增塑剂ATBC能够降低混炼胶的粘度和硫化胶力学性能。与增塑剂DOP相比,添加增塑剂ATBC的硫化胶增塑效果、耐低温性能以及力学性能均较高。在实验条件下,添加增塑剂DOP的胶料热稳定性要好于增塑剂ATBC。     

配合体系对丁腈橡胶胶料性能的影响

研究生胶体系、防护体系、增塑体系、硫化体系对丁腈橡胶（NBR）硫化胶性能的影响。结果表明,当单独采用丙烯腈含量为29%的NBR2707或NBR N640时,NBR硫化胶的耐油性能优异,但耐低温性能较差;适宜的防护体系可以在不影响NBR硫化胶的力学性能的前提下,提高其耐油性能和抗压缩永久变形性能;采用增塑剂DOS/TP-95体系的NBR硫化胶的力学性能和耐油性能优于单独采用增塑剂DOS或TP-95的NBR硫化胶;采用过氧化物DCP/甲基丙烯酸镁和过氧化物BIPB/硫黄给予体硫化体系的NBR硫化胶的综合性能优异。     

增塑剂对丁腈橡胶胶料性能的影响

研究增塑剂种类和用量对丁腈橡胶胶料性能的影响。结果表明:在填充不同类型增塑剂的胶料中,填充增塑剂DOS的胶料的排胶温度最低,门尼粘度最小,填料分散性最好,硫化速度最慢,拉断伸长率和压缩永久变形最大;填充增塑剂DOP的胶料的应力松弛最快,硫化特性较好;填充增塑剂TP-95和PPA2500的胶料的排胶温度较高,应力松弛较慢,硬度和回弹值较大。随着增塑剂DOP用量的增大,胶料的密炼能量消耗减小,排胶温度降低,门尼粘度减小,应力松弛加快,硫化速度变慢,拉断伸长率和回弹值增大,耐低温性能和阻尼性能提高。     

增塑剂对ACM／ECO并用胶性能的影响

比较增塑剂邻苯二甲酸二辛酯（DOP）、凡士林、石蜡、聚异丁烯（PIB）和古马隆树脂对丙烯酸酯橡胶（ACM）／氯醚橡胶（ECO）并用胶性能的影响。结果表明：增塑剂的加入使并用胶的硫化速度减慢和转矩减小,其中古马隆树脂和DOP对并用胶硫化特性影响较小;以DOP为增塑剂的ACM／EC0并用胶物理性能、耐热老化性能、耐油性能、耐高温压缩性能和低温使用性能较好,综合性能最优。     

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.     

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.     

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.     

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。     

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     

改善NR耐老化耐屈挠特性的研究概况

介绍了影响天然橡胶(NR)耐老化、耐屈挠特性的几个因素,分别综述了NR与BIIR,CIIR,BR,SBR,EPDM等胶料配合后的作用,以及防老剂、填料及其他因素对提高NR耐老化、耐屈挠特性的影响,总结了提高NR耐老化、耐屈挠特性的主要途径和方法及其相关方向的研究进展。     

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。     

类金刚石薄膜对Low-E膜系的保护作用分析

采用射频等离子体增强化学气相沉积法(RF-PECVD),在Low-E玻璃表面沉积类金刚石(DLC)薄膜作为保护层,通过耐洗刷试验和耐酸腐蚀试验研究了DLC薄膜对Low-E膜系的保护作用;同时对镀DLC薄膜的Low-E玻璃进行热处理,研究热处理后Low-E玻璃膜层结构、低辐射性能和光学性能的变化;然后通过摩擦磨损实验对镀DLC膜提高Low-E玻璃耐洗刷的原因进行分析。结果表明:DLC膜能够有效提高Low-E玻璃耐洗刷性和耐酸腐蚀性;并且DLC膜可以通过热处理去除,且热处理后的Low-E低辐射性能和光学性能未受到影响;一定厚度DLC膜能够有效降低Low-E玻璃摩擦系数,是提高Low-E玻璃耐磨性的主要原因。     

阻燃耐寒输送带的开发研制

介绍了阻燃耐寒输送带复盖胶料配方的设计和加工工艺，产品具有良好的阻燃性能，又有优异的耐寒性能，解决了北方冬季胶带变硬，打滑、龟裂甚至断带等事故发生，满足了我国北方寒冷地区矿山大运量，高速度输送固体物料的需要，填补了国内空白。