环保型乳聚丁苯橡胶的性能对比分析

研究对比了兰州石化公司近年来开发的结合苯乙烯质量分数为23.5%的环保型乳聚丁苯橡胶SBR1723、SBR1778E、SBR1763E及与非环保牌号SBR1712的填充油类型、硫化特性、物理机械性能及动态力学性能的差异。结果表明,4个牌号丁苯橡胶(SBR)采用的橡胶填充油不同是其产品特性不同的主要因素,SBR1712的硫化速度较快,而SBR1778E的硫化速度较慢;力学性能方面,4个牌号胶料的拉伸强度相当,SBR1723和SBR1778E的扯断伸长率高于SBR1712和SBR1763E;环保型SBR的玻璃化转变温度(Tg)由高到低依次是SBR1763E、SBR1778E和SBR1723;通过动态力学性能测试不同温度下的损耗因子显示,SBR1763E的干地操控性能和抗湿滑性能良好,是动态性能最接近SBR1712的环保型橡胶,SBR1778E和SBR1723具备最低的滚动阻力和抗湿滑性能。     

研究院环保型丁苯橡胶1502E项目通过验收

由中国石油吉林石化公司研究院与有机合成厂合作开发的环保型丁苯橡胶1502E项目通过验收,这是该院继环保型丁苯橡胶1500E工业化取得成功后,取得的又一成果。丁苯橡胶(SBR)是最大的通用合成橡胶品种,也是最早实现工业化生产的橡胶之一,随着世     

20世纪90年代乳聚丁苯橡胶应用技术专利新进展

介绍了1992－19984年已在国内工业化生产的4种乳聚丁苯橡胶（ESBR）－SBR1500，SBR1502，SBR1712和SBR1778在应用方面的各国专利。在这7年间，SBR1502技术的进展最快，SBR1500和SBR1712次之，SBR1778最慢。这4种ESBR的应用技术开发主要围绕着轮胎工业展开，SBR1712应用于轮胎工业的专利篇数占SBR1712应用技术专利总数的83％，而SBR1500占68％，SBR1502占54％。ESBR应用技术的一个显著特点是与NR等配合使用，极少单独使用。     

环保型丁苯橡胶试产

环保型非充油丁苯橡胶SBR1502E于8月14日在南京扬子石化金浦橡胶有限公司投入工业化试生产,为丁苯橡胶应用的环保性提供了可靠保证。环保型丁苯橡胶是指在生产、加工和使用过程中不产生亚硝胺等有毒物质,对环境无污染,对人体无危害。SBR1502E既可用作制造丁苯橡胶胶粘剂的主体原料,又能用作SBS万能胶的增稠剂和SBS喷胶的增韧剂。     

国内外SBR质量剖析

对国产SBR1500,SBR1502和SBR1712系列胶样与相应的国外胶样进行质量剖析,结果表明,国产各系列胶样的平均相对分子质量、相对分子质量分布和化学分析结果与相应的国外胶样基本相当,加工性能和硫化胶的静态物理性能与相应的国外胶样相似或稍优,动态力学性能超过或等同于相应的国外胶样。     

不同牌号ESBR的性能特点及应用

介绍不同牌号乳聚丁苯橡胶的性能特点及应用.SBR1502胶料的焦烧时间比SBR1500胶料有所缩短,硫化速度稍慢;SBR1507具有优异的加工性能;SBR1516胶料的硫化速度比SBR1502胶料稍慢,但加工性能较好,具有突出的抗湿滑性能;SBR1721胶料的硫化速度比SBR1712胶料慢,具有优异的抗湿滑性能;与非充油胶相比,充油胶具有加工性能好、生热低和耐磨性能好等特点,可降低生产成本.     

环保型橡胶增塑剂的研制及其充油丁苯橡胶的性能

以环烷基油的减压三线馏分油为原料,采用加氢精制-溶剂抽提方法富集芳烃和环烷烃,并脱除有害性多环芳烃,制备芳烃含量高的环保型橡胶增塑剂。采用高性能轿车子午线轮胎胎面胶配方,对填充环保型增塑剂的丁苯橡胶SBR1763与填充高芳烃油的SBR1712和填充处理高芳烃油（TDAE）的SBR1723进行性能对比。结果表明,SBR1763的理化性能及其硫化胶的物理性能与SBR1723相近。     

溶聚丁苯橡胶T2530基本性能的研究

探讨国产溶聚丁苯橡胶(SSBR)T2530的基本性能.结果表明,与乳聚丁苯橡胶(ESBR)1712E和1712相比,SSBR生胶的重均相对分子质量略小,数均相对分子质量稍大,相对分子质量分布较窄,纯胶含量较高;混炼胶的门尼粘度较高,硫化速度较快,焦烧时间略有缩短,但加工工艺性能差别不大;硫化胶的300%定伸应力和拉伸强度略低(适当调整炭黑用量可使300%定伸应力达到ESBR的水平),弹性较好,滚动阻力较低.     

环保型丁苯橡胶1502E在农业子午线轮胎中的应用

研究环保型丁苯橡胶(SBR)1502E在农业子午线轮胎胎面胶及胎体帘布胶中的应用。结果表明:用环保型SBR1502E等量替代SBR1502后,胎面胶的门尼粘度明显下降,回弹值增大,耐磨性能和抗撕裂性能略有提高,生热降低,拉伸性能变化不大;胎体帘布胶的门尼粘度明显下降,回弹值增大,生热降低,H抽出力和抗撕裂性能略有提高,拉伸性能变化不大;工艺性能良好;成品轮胎的物理性能变化不大。     

凝聚母液pH值的变化对环保型丁苯橡胶SBR1502E性能的影响

以中国石油吉林石化公司环保型丁苯橡胶SBR1502E为研究对象,研究了凝聚母液在不同pH值下对胶性能的影响.结果表明,在不改变母液温度、胶液进料量、高分子絮凝剂加入量情况下,凝聚母液pH值的变化对胶的性能产生较大影响,当初始pH值为3.0～3.5时,环保型丁苯橡胶SBR1502E的性能全部达到优级品技术标准.     

Spontaneous ignition of styrene-butadiene rubber

Laboratory experiments with small samples of styrene-butadiene rubber show a complex thermal history which suggests the presence of both endothermic and exothermic processes. The suggested mechanisms are shown to be qualitatively correct by computer simulation. Both the laboratory tests and two larger scale tests show that styrene-butadiene rubber of the present composition will not spontaneously ignite if its surroundings are held at a sufficiently low temperature below about 220°C (428°F).     

Non-Gaussian effects in styrene-butadiene rubber

Simultaneous measurements of stress and birefringence were made on a vulcanized styrene-butadiene rubber (SBR) at 0°, 15° and 25°C. The stress-strain curves at all temperatures showed a strong upward deviation from the Gaussian statistical theory at high extensions which became more pronounced with decreasing temperature due to the increasing extension to break. The birefringence, however, was substantially of the form predicted by the Gaussian theory. Comparison studies on natural rubber under similar conditions of experiment showed birefringence and hysteresis effects which could be interpreted on the basis of strain-induced crystallisation (as revealed by X-rays). Such effects were completely absent in the SBR samples which also showed no evidence of crystallisation on X-ray examination in the stretched state. It is concluded that the upturn in stress-strain curve in both materials is primarily due to the limited extensibility of the network, as treated in the non-Gaussian statistical theory, and that crystallisation, when present, plays only a subsidiary role.     

绢云母在丁苯橡胶中的应用

以滁州绢云母为填料,将其改性后制备了改性绢云母/丁苯橡胶(SBR)复合材料,考察了复合材料物理机械性能的影响因素,并通过傅里叶变换红外谱(FTIR)表征了改性绢云母和复合材料。结果表明,在改性剂WD 81质量分数为2.0%、改性温度为90℃、改性时间为25 min以及改性绢云母用量为80份、硫化温度为150℃、硫化时间为12 min的条件下制得的改性绢云母/SBR复合材料的拉伸强度、扯断伸长率、撕裂强度和邵尔A硬度分别达到6.81 MPa、856%、28.04 k N/m和56;改性绢云母/SBR复合材料的官能团发生了加成聚合反应,改性剂起到"桥梁"作用,提高了绢云母对SBR基体的增强作用。     

天然橡胶/顺丁橡胶/丁苯橡胶自润滑喷蜡橡胶材料的性能

在天然橡胶(NR)/顺丁橡胶(BR)/丁苯橡胶(SBR)为基体的自润滑喷蜡橡胶材料中加入芥酸酰胺,考察芥酸酰胺作为润滑剂时对NR/BR/SBR自润滑喷蜡橡胶材料的硫化特性、力学性能、门尼黏度、摩擦系数及耐老化性能的影响。结果表明,与未加芥酸酰胺的胶料相比,当芥酸酰胺用量为10份时,胶料转矩减小,焦烧时间和正硫化时间缩短,扯断伸长率从388%增加至523%,拉伸强度降低了21.36%,邵尔A硬度、压缩永久变形分别下降5.56%和8.74%,动、静摩擦系数分别减小23.46%和24.82%,门尼黏度降低20.89%,耐热氧老化性能下降。硫化胶拉伸100%停放5 min后,表面出现明显的白色润滑膜,胶料流动性变好,各组分分散得更均匀,断面更光滑。     

环境友好的SBR表面改性方法

介绍3种环境友好的SBR表面改性方法，它们能有效地增加SBR的表面极性，减小接触角，提高粘接强度。与传统的化学处理方法相比，它们对环境不会造成污染，同时，使施工更安全。     

Short sisal fiber reinforced styrene-butadiene rubber composites

Styrene-butadiene rubber (SBR) composites were prepared by incorporating short sisal fibers of different lengths and concentrations into the SBR matrix in a mixing mill according to a base formulation. The curing characteristics of the mixes were studied and the samples were vulcanized at 150°C. The properties of the vulcanizates such as stress-strain behavior, tensile strength, modulus, shore-A hardness, and resilience were studied. Both the cured and uncured properties showed a remarkable anisotropy. It has been found that aspect ratio in the range of 20–60 is effective for sufficient reinforcement. The mechanical properties were found to increase along and across the grain direction with the addition of fibers. The effects of fiber length, orientation, loading, type of bonding agent, and fiber-matrix interaction on the properties of the composites were evaluated. The extent of fiber orientation was estimated from green strength measurements. The adhesion between the fiber and the rubber was enhanced by the addition of a dry bonding system consisting of resorcinol and hexamethylene tetramine. The bonding agent provided shorter curing time and enhanced mechanical properties. The tensile fracture surfaces of the samples have been examined by scanning electron microscopy (SEM) to analyze the fiber surface morphology, orientation, fiber pull-out, and fiber-matrix interfacial adhesion. Finally, anisotropic swelling studies were carried out to analyze the fiber-matrix interaction and fiber orientation. © 1995 John Wiley & Sons, Inc.     

官能化溶聚丁苯橡胶研究进展

介绍了溶聚丁苯橡胶的发展历程,从官能化引发剂、官能化封端改性等方面详述了官能化溶聚丁苯橡胶的研究进展及溶聚丁苯橡胶的官能化技术在轮胎用橡胶方面的重要作用。将官能化技术和偶联技术结合而产生的官能化星型溶聚丁苯橡胶是丁苯橡胶研究的一个重要方面。     

丁苯橡胶/高岭土纳米复合材料的性能

采用熔融共混法和乳液共混法制备了丁苯橡胶／高岭土纳米复合材料,研究了复合材料的分散性能、力学性能和热稳定性能。结果表明,高岭土在橡胶基体中具有良好的分散性。熔融共混法制备的复合材料的力学性能基本接近白炭黑填充橡胶,其热稳定性能明显优于白炭黑填充橡胶。随着纳米高岭土用量的增大,乳液共混法制备的复合材料的拉伸强度先增大后减小,且当纳米高岭土用量为40质量份时,复合材料的综合性能良好。     

双金属稀土促进剂对丁苯橡胶/天然橡胶胎面胶的影响

通过配位反应制备得到双金属硫化促进剂二乙基二硫代氨基甲酸锌镧配合物(ZnLaDC),在不添加传统活化体系氧化锌(ZnO)/硬脂酸(SA)的情况下,考察了ZnLaDC用量对丁苯橡胶(SBR)/天然橡胶(NR)胎面胶复合材料硫化特性及物理机械性能的影响,并与传统硫化体系二乙基二硫代氨基甲酸锌(ZnDC)/ZnO/SA制备的硫化胶性能进行了对比。结果表明,随着ZnLaDC用量的增加,SBR/NR胎面胶复合材料的硫化特性、压缩疲劳生热性能及耐磨性得到有效提高,当ZnLaDC用量为5份时,复合材料的综合性能最佳。与传统硫化体系ZnDC/ZnO/SA制备的硫化胶相比,采用ZnLaDC制备的硫化胶具有更优异的静态力学性能及耐切割性。