Evaluation of thermal and mechanical properties of rubber compositions based on SBR extended with safe oils

The extender oil usually employed in compositions of rubbers based on styrene and butadiene (SBR) 1712 is the distilled aromatic extract (DAE). In this work, this oil was substituted by oils with low levels of polycyclic aromatic hydrocarbons (PAHs): treated residual aromatic extract (TRAE) and two naphthenic oils from different suppliers (HN1 and HN2). This substitution was performed in response to REACH Regulation (EC No. 1907/2006 European Parliament and the Council of December 18, 2006, Annex XVII), which state that the sum of individual PAHs should be below 10 mg/kg and the levels of benzo (a) pyrene (BaP) should not exceed 1 mg/kg. Infrared spectroscopy was employed to characterize the structure of crude oils and respective SBR compositions. Thermal properties of the materials were evaluated by thermogravimetry and differential scanning calorimetry. Mechanical properties as tension tests, hardness, abrasion resistance, and resilience were also determined. The final results showed that it is possible to replace the extender oil DAE for any of the oils tested, specially the naphthenic HN1, without any loss of the properties evaluated in this study for the SBR compositions. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012     

丁苯橡胶充填用环保芳烃油的研制

利用扬子公司范围内的重质物料进行了原料的筛选,提出一种生产环保芳烃油的新型工艺路线,并对环保芳烃油进行了分析及充填橡胶评价。结果表明,与进口典型环保芳烃油相比,生产的环保芳烃油具有密度、黏度、折光偏低的特点,充填橡胶的性能完全达到了指标要求。新型的环保芳烃油完全可替代丁苯橡胶原有非环保高芳填充油。     

环保橡胶油产品的发展概况

简介橡胶油的作用机理,概述环保橡胶油产品的发展状况。环保橡胶油分为经处理芳烃油(TDAE)、环烷烃油(NAP)、浅度溶剂抽提油(MES)、残余芳烃抽提油(RAE)和调合油五大类。TDAE的使用性能较好,应用广泛;芳碳率(C_A)和环烷碳率(C_N)之和不小于55%的NAP与橡胶的相容性较好,应用前景良好;MES的C_A较小,饱和度和生产成本较高;RAE与丁苯橡胶(SBR)相容性较好,价格较低。填充TDAE的SBR1723、填充NAP的SBR1762以及填充RAE的SBR1783均可替代填充芳烃油(DAE)的SBR1712。     

拖拉机轮胎全SR胎面的研制

研究了用全ＳＲ制做７．５０－１６（人）拖拉机轮胎胎面。结果表明，胎面胶胶料生胶采用ＳＢＲ１５００／ＳＢＲ１７１２（６０／４０）或ＳＢＲ１５００／ＢＲ／ＳＢＲ１７１２（５０／３０／２０）并用体系均可；炭黑选用炭黑Ｎ３３９最好；软化剂选用芳烃油，用量宜较高；增粘剂选用ＲＸ－８０树脂。全ＳＲ胎面硫化胶的强撕性能、耐磨性能较好，成品轮胎性能符合国家标准，实际里程试验的花纹磨耗量低于现在生产轮胎。     

SBR1712在轻型载重轮胎胎面胶中的应用

对SBRl712在轻型载重轮胎胎面胶中的应用进行了研究。结果表明，在NR／BR／SBR并用体系胎面胶中，用SBRl712替代SBRl500，胶料的加工工艺性能明显改善，硫化胶的生热明显降低，磨耗量有所减小，成品轮胎的耐久性能和高速性能有所提高，胎面温升明显降低，实际行驶里程和累计磨耗显著提高，生产成本降低。     

Replacing fossil oil with fresh oil – with what and for what?

Industrial chemicals and materials are currently derived mainly from fossil‐based raw materials, which are declining in availability, increasing in price and are a major source of undesirable greenhouse gas emissions. Plant oils have the potential to provide functionally equivalent, renewable and environmentally friendly replacements for these finite fossil‐based raw materials, provided that their composition can be matched to end‐use requirements, and that they can be produced on sufficient scale to meet current and growing industrial demands. Replacement of 40% of the fossil oil used in the chemical industry with renewable plant oils, whilst ensuring that growing demand for food oils is also met, will require a trebling of global plant oil production from current levels of around 139 MT to over 400 MT annually. Realisation of this potential will rely on application of plant biotechnology to (i) tailor plant oils to have high purity (preferably >90%) of single desirable fatty acids, (ii) introduce unusual fatty acids that have specialty end‐use functionalities and (iii) increase plant oil production capacity by increased oil content in current oil crops, and conversion of other high biomass crops into oil accumulating crops. This review outlines recent progress and future challenges in each of these areas. Practical applications: The research reviewed in this paper aims to develop metabolic engineering technologies to radically increase the yield and alter the fatty acid composition of plant oils and enable the development of new and more productive oil crops that can serve as renewable sources of industrial feedstocks currently provided by non‐renewable and polluting fossil‐based resources. As a result of recent and anticipated research developments we can expect to see significant enhancements in quality and productivity of oil crops over the coming decades. This should generate the technologies needed to support increasing plant oil production into the future, hopefully of sufficient magnitude to provide a major supply of renewable plant oils for the industrial economy without encroaching on the higher priority demand for food oils. Achievement of this goal will make a significant contribution to moving to a sustainable carbon‐neutral industrial society with lower emissions of carbon dioxide to the atmosphere and reduced environmental impact as a result.     

芳香油与油脂植物资源教学实践

精油与油脂分别是芳香油植物和油脂植物提取的天然产品.通过芳香油与油脂植物资源教学实践,探求植物资源学课程适宜的教学内容与方法.从专业特色角度出发,除了讲授常规植物资源总论和植物资源各论,增加了森林植物资源学和植物资源学课内实践（实验）等相关内容,加强学生实践技能培养,提升本科生综合素质.     

Transformer oils prepared from the vacuum distillates of Egyptian crude paraffinic petroleum

Vacuum gas oil and spindle oil obtained from the vacuum distillation of paraffinic crude oil from the Western Desert region of Egypt were utilized for transformer oils production. The vacuum gas oil, spindle oil and blends therefrom containing different percentages of these oils and were subjected to aromatic extraction, dewaxing catalytic hydrogenation processes. The aromatic extraction process used N-methyl-2-pyrrolidone as solvent, for a feed ratio of 0.7:1 (wt/wt) at an extraction temperature of 55 °C, while in the dewaxing process the wax is removed by chilling the raffinate at − 42 °C using MEK-toluene (60:40,vol/vol). The hydrofinishing process was achieved in a pilot plant using NiO–MoO₃/Al₂O₃ catalyst. These refining processes improved the viscosity indices and the pour points of the resulting oils and removed most of the polar impurities. It was found that, the transformer oil formulated from 7:3 b.w. vacuum gas oil:spindle oil respectively meets the IEC 60296-2003 standard specifications requirements. Its sulfur content is very low and non-corrosive. The gassing tendency is also low due to its low aromatic content. Further, the electrical properties which are significant for transformer oils fulfill the standard specifications as a result of the low water content and polar contaminants. Moreover, addition of 2,4-dimethyl-6-tertiary butyl phenol increases the oxidation stability of the produced oil, by acting as a free radical inhibitor.     

SBR1762与SBR1712的性能对比研究

<正>充油丁苯橡胶SBR1712E具有优良的加工性和抗湿滑性,被广泛用于半钢子午线轮胎中,但该胶填充油内含有苯并芘等稠环芳烃化合物,用该胶生产的轮胎不能满足欧盟REACH法规(1907/2006/EC)的要求。为此笔者所在公司使用重环烷油(Heavy     

环保油对SBR胶料性能的影响

试验研究几种环保油对SBR胶料性能的影响,并与高芳烃油进行对比.结果表明,以环保油替代高芳烃油,胶料的门尼粘度下降,流动性得到改善;硫化胶的300%定伸应力和回弹值增大,生热降低,耐热空气老化性能变化不大,抗湿滑性能稍差,耐磨性能提高,滚动阻力减小,炭黑分散性下降.