环保填充油对丁苯橡胶性能的影响

研究不同环保填充油替代高芳烃油对乳聚丁苯橡胶(ESBR)和溶聚丁苯橡胶(SSBR)性能的影响。结果表明:SSBR对环保油的适应性较好,充环保油SSBR胶料的自粘性提高,硫化胶的物理性能相当,滚动阻力、耐磨性能和抗湿滑性能较优;ESBR对填充油的选择性较高,芳烃含量较低的环保填充油在其中存在析出现象,充环保油ESBR胶料的自粘性降低、抗湿滑性能稍差。     

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.     

SSBR和ESBR胎面胶性能研究

研究炭黑或白炭黑补强溶聚丁苯橡胶(SSBR)和乳聚丁苯橡胶(ESBR)胎面胶的性能.结果表明,SSBR与白炭黑的界面作用强于ESBR;当采用白炭黑补强时,SSBR硫化胶的物理性能优于ESBR,而采用炭黑补强时,SSBR硫化胶的物理性能无明显优势;与炭黑补强SBR硫化胶相比,白炭黑补强SBR硫化胶的抗湿滑性能较好,滚动阻力较低,但耐磨性能较差,其中白炭黑补强SSBR硫化胶的抗湿滑性能最突出.     

不同厂家SBR对高性能乘用轮胎胎面胶性能的影响

研究不同厂家溶聚丁苯橡胶(SSBR)、乳聚丁苯橡胶(ESBR)生胶和混炼胶的加工性能,并对胶料的硫化特性、物理性能、耐磨性能、抗湿滑性能和滚动阻力进行对比。结果表明,与ESBR相比,SSBR生胶及其混炼胶的加工性能相差不大,但均较难加工;SSBR胶料的硫化特性、物理性能满足轮胎加工及使用性能要求。LAT100磨耗试验结果表明,与ESBR相比,SSBR硫化胶的耐磨性能降低,抗湿滑性能提高,滚动阻力增大。     

不同炭黑对溶聚丁苯橡胶性能的影响

研究不同炭黑对溶聚丁苯橡胶(SSBR)性能的影响。结果表明:在密炼(一段混炼)过程中炭黑N330填充SSBR胶料的温度和功率均较高,不同炭黑填充SSBR胶料的粘-切依赖性大致相同;炭黑粒径越小、结构度越高,其填充SSBR胶料的Payne效应越显著;炭黑SP5000填充SSBR胶料的焦烧时间最长,炭黑N115,N234,N330和N550填充SSBR胶料的硫化速率稍快;粒径较小的炭黑填充SSBR硫化胶的物理性能和耐磨性能较优,但压缩温升较高;粒径相近而结构度较高的炭黑填充SSBR硫化胶的物理性能优于结构度较低的炭黑填充硫化胶;粒径较大的炭黑填充SSBR硫化胶的抗湿滑性能较好和滚动阻力较低,炭黑N774填充SSBR硫化胶的抗湿滑性能最好,且滚动阻力最低。     

通用型及官能化溶聚丁苯橡胶在高性能轮胎胎面胶中的应用

研究国产通用型及官能化溶聚丁苯橡胶(SSBR)在高性能轮胎胎面胶中的应用,并与乳聚丁苯橡胶(ESBR)和进口SSBR进行对比。结果表明:与ESBR胶料相比,通用型SSBR胶料的定伸应力和拉伸强度较低,但抗湿滑性能明显提高,滚动阻力降低;与通用型SSBR和进口SSBR胶料相比,官能化SSBR胶料的物理性能变化不大,加工性能有所提高,抗湿滑性能改善,滚动阻力明显降低。     

溶聚丁苯橡胶2557A的结构与性能研究

研究溶聚丁苯橡胶(SSBR)2557A的结构和性能,探讨其对轮胎胎面胶抗湿滑性能和滚动阻力的影响,并与乳聚丁苯橡胶(ESBR)1712E进行对比。结果表明:与ESBR1712E相比,SSBR2557A的乙烯基含量高,数均和重均相对分子质量大,相对分子质量分布指数小;混炼胶的焦烧时间长,硫化速度稍慢;硫化胶的邵尔A型硬度和定伸应力稍高,拉断伸长率减小,压缩生热和压缩永久变形较低,其他物理性能差别不大,不同应变下的剪切弹性模量、剪切损耗模量和损耗因子(tanδ)均较小,0℃下的tanδ值较大,60℃下的tanδ值较小。采用SSBR2557A的胎面胶在抗湿滑性能和滚动阻力方面可达到较好的平衡。     

不同苯乙烯含量的充油溶聚丁苯橡胶在高性能轮胎胎面胶中的应用

以溶聚丁苯橡胶（SSBR）Buna VSL 5025-1和2438-2HM、乳聚丁苯橡胶（ESBR）1712和1721并用BR9000为基体,以炭黑和白炭黑为补强剂,对比研究几种胶料的硫化特性、物理性能、动态力学性能、耐磨性能和抗湿滑性能。结果表明：与ESBR1712和1721胶料相比,炭黑或白炭黑填充SSBR Buna VSL 5025-1和2438-2HM胶料的操作安全性、耐磨性能、抗湿滑性能较好;白炭黑填充SSBR Buna VSL 5025-1和2438-2HM胶料的滚动阻力较小、耐热老化性能较差,炭黑填充SSBR Buna VSL 5025-1和2438-2HM胶料的滚动阻力较大、耐热老化性能较好。     

国产充油双峰相对分子质量分布乳聚丁苯橡胶性能研究

研究国产充油双峰相对分子质量分布乳聚丁苯橡胶（ESBR）的生胶、混炼胶和硫化胶性能,并与传统单峰相对分子质量分布ESBR的性能作对比。结果表明：充油双峰相对分子质量分布ESBR中引入的小分子组分可以起到降低生热、改善加工性能、提高抗湿滑性能和耐低温性能等作用;相对于填充油,小分子组分有利于提高胶料的硫化速度和拉断伸长率,但胶料滚动阻力较大,玻璃化温度较高。充油双峰相对分子质量分布ESBR的应用还需进一步研究。     

SSBR基本性能的研究

对比研究溶聚丁苯橡胶（SSBR）Buna VSL 5025-2和2438-2HM、乳聚丁苯橡胶（ESBR）1712和1721生胶、混炼胶和硫化胶的基本性能。结果表明：与ESBR1712相比,SSBR Buna VSL 5025-2生胶的加工性能稍差,混炼胶的操作安全性能较好,硫化胶的定伸应力较大,拉伸强度和拉断伸长率较小,抗湿滑性能较好,滚动阻力稍高;与ESBR1721相比,SSBR Buna VSL 2438-2HM硫化胶的滚动阻力较低,其余性能变化趋势和SSBR Buna VSL 5025-2与ESBR1712的变化趋势相似。     

超细全硫化粉末橡胶改性丁苯橡胶的性能研究

研究超细全硫化粉末橡胶(UFPR)改性丁苯橡胶(SBR)(UFPR-SBR)胶料的性能。结果表明:与SBR胶料相比,UFPR-SBR胶料门尼粘度总体提高,硫化速率增大,硬度和300%定伸应力提高,其他物理性能总体变化不大,耐磨性能、抗湿滑性能和滚动阻力平衡更好。UFPR主要成分为结合苯乙烯质量分数为0.3的SBR和结合丙烯腈质量分数为0.31的丁腈橡胶时,UFPR-SBR的耐磨性能和抗湿滑性能较好。     

Weak Boundary Layers in Styrene-Butadiene Rubber

In this paper two kinds of weak boundary layers (WBL) in synthetic vulcanized styrene-butadiene rubber are described.

i) WBL produced by the presence of antiadhesion compounds of the rubber formulation (zinc stearate, microcrystalline paraffin wax). These WBL cannot be effectively removed by solvent wiping, whether followed by washing with an ethanol/water mix or not. Although this treatment allowed a significant removal of zinc stearate, the paraffin wax concentration on the surface was not greatly reduced, thus, poor adhesion of rubber was obtained. Chlorination with small amounts of ethyl acetate (EA) solutions of trichloro isocyanuric acid (0.5–5 wt% TCI/EA) and/or an extended halogenation treatment increased the adhesion strength and effectively eliminated the zinc stearate from the rubber surface. If an additional heat treatment (50°C/24h) of the chlorinated rubber was also carried out, the WBL was more effectively eliminated and the resulting adhesion was independent of the amount of chlorination agent applied to the rubber surface. Furthermore, this heat treatment favoured the elimination of WBL in the untreated rubber and also contributed to the removal of WBL produced by an excess of halogenation agent.

ii) WBL created by an excess of chlorination agent applied to the rubber surface. The excess of chlorination agent produced lack of adhesion in the rubber because there was significant damage of the rubber surface and a non-rubber surface layer was formed (mainly due to oxidized, chlorinating agent residues and cyanuric acid), which contributed to the formation of WBL. To avoid the creation of WBL, a postchlorination treatment of rubber with a solution of 25 wt% ethanol in water followed by a vacuum-drying process produced excellent results. The effectiveness of this treatment relied on combining an adequate degree of chlorination with no external surface deterioration of the rubber by the excess of chlorination agent.     

Weak Boundary Layers in Styrene-Butadiene Rubber

In this paper two kinds of weak boundary layers (WBL) in synthetic vulcanized styrene-butadiene rubber are described.

i) WBL produced by the presence of antiadhesion compounds of the rubber formulation (zinc stearate, microcrystalline paraffin wax). These WBL cannot be effectively removed by solvent wiping, whether followed by washing with an ethanol/water mix or not. Although this treatment allowed a significant removal of zinc stearate, the paraffin wax concentration on the surface was not greatly reduced, thus, poor adhesion of rubber was obtained. Chlorination with small amounts of ethyl acetate (EA) solutions of trichloro isocyanuric acid (0.5-5 wt% TCI/EA) and/or an extended halogenation treatment increased the adhesion strength and effectively eliminated the zinc stearate from the rubber surface. If an additional heat treatment (50°C/24h) of the chlorinated rubber was also carried out, the WBL was more effectively eliminated and the resulting adhesion was independent of the amount of chlorination agent applied to the rubber surface. Furthermore, this heat treatment favoured the elimination of WBL in the untreated rubber and also contributed to the removal of WBL produced by an excess of halogenation agent.

ii) WBL created by an excess of chlorination agent applied to the rubber surface. The excess of chlorination agent produced lack of adhesion in the rubber because there was significant damage of the rubber surface and a non-rubber surface layer was formed (mainly due to oxidized, chlorinating agent residues and cyanuric acid), which contributed to the formation of WBL. To avoid the creation of WBL, a postchlorination treatment of rubber with a solution of 25 wt% ethanol in water followed by a vacuum-drying process produced excellent results. The effectiveness of this treatment relied on combining an adequate degree of chlorination with no external surface deterioration of the rubber by the excess of chlorination agent.     

不同结构顺丁橡胶/溶聚丁苯橡胶并用胶的性能研究

研究不同结构顺丁橡胶(BR)[镍系BR(NiBR)牌号9000,钕系BR(NdBR)牌号CB24,SKD-NdII,Nd22EZ和Nd24EZ]对BR/溶聚丁苯橡胶(SSBR)并用胶性能的影响。结果表明:5种牌号BR的顺式1,4-结构摩尔分数基本一致(约为0. 96);采用NiBR的硫化胶性能与采用NdBR的硫化胶无明显差别,甚至部分性能略优;采用CB24的硫化胶物理性能、耐疲劳裂纹扩展性能和抗切割性能较好,抗湿滑性能优良,但滚动阻力较大;采用Nd24EZ的硫化胶撕裂强度较大,裂纹扩展速率较小;采用Nd22EZ的硫化胶抗湿滑性能较好,滚动阻力较小;采用Nd22EZ与Nd24EZ的硫化胶中白炭黑的分散性较好。     

Rheology of Short Nylon-6 Fiber Reinforced Styrene-Butadiene Rubber

ABSTRACT

The rheological characteristics of short Nylon-6 fiber reinforced styrene butadiene rubber (SBR) were studied using a capillary rheometer. The study was done with respect to the effect of shear rate, fiber concentration, and temperature on shear viscosity and die swell. All the melts showed pseudoplastic nature, which decreased with increasing temperature. Shear viscosity increased in the presence of fibers. Introduction of fiber reduces the temperature sensitivity of the rubber matrix. A reduction in die swell was found in presence of fibers.     

阻尼赋予剂对丁苯橡胶/再生橡胶并用胶性能的影响

研究阻尼赋予剂[锆钛酸铅压电陶瓷(PZT)、石墨、氧化锌晶须]对丁苯橡胶/再生橡胶并用胶性能的影响,胶料阻尼性能在振动仿真试验机上测试。结果表明:当振动频率为10Hz时,胶料的阻尼性能稳定;随着振动时间延长,添加不同阻尼赋予剂的胶料阻尼性能均有不同程度降低;添加阻尼赋予剂的胶料阻尼性能、加工安全性能和物理性能均有所提高;PZT胶料的阻尼性能最好,PZT的用量以3份为宜。     

溶聚丁苯胶SSBR2564S在冬季轮胎胎面胶中的应用研究

试验研究溶聚丁苯胶SSBR2564S在冬季轿车子午线轮胎胎面胶中的应用。结果表明：在冬季轮胎胎面胶中使用SSBR2564S代替ESBR1723,并调整炭黑/白炭黑并用比例,试验胶料300%定伸应力、拉伸强度略低;硬度较低,在低温下(0℃)硬度变化较小,动态粘弹性试验数据表明胶料有较好的湿地抓着力和较低滚动阻力。该试验胶料工艺性能较好,试制的185/60R14轮胎完全通过室内性能测试。经市场验证,该试验胶料生产的轮胎冰雪地面操控性能极好,提高我公司冬季胎市场竞争力。     

我国溶聚丁苯橡胶的生产现状及发展建议

介绍溶聚丁苯橡胶(SSBR)的结构特点和工业生产技术。综述近年来国内外SSBR的生产情况,对国内SSBR的市场前景进行分析,认为未来几年国内SSBR的需求将继续增长,SSBR行业仍具有较大的发展空间。分析了目前我国SSBR装置开工率不高的原因,并针对我国的现状,提出了努力降低SSBR生产成本、提高SSBR产品质量的均一性和大力开发特种高性能SSBR新产品行业发展建议。     

Surface Analysis of Debonded Chlorinated Vulcanized Styrene-Butadiene Rubber Joints

A synthetic vulcanized styrene-butadiene rubber (R) was treated with a halogenation agent (TCI = trichloroisocyanuric acid) to produce improved adhesion (i.e. high T-peel strength) in joints prepared with a one-component, solvent-based polyester urethane adhesive. Several amounts (0.5 to 7 wt%) of TCI solutions in ethyl acetate were applied to the rubber surface and, after T-peel tests were carried out, the surfaces of the debonded chlorinated rubber pieces were analyzed with XPS, ATR-infra-red (ATR-IR) spectroscopy, Scanning Electron Microscopy (SEM) coupled with EDX analysis, and contact angle measurements. The T-peel strength of unchlorinated rubber (0 wt% TCl) joints was small due to the migration of low molecular species (mainly microcrystalline wax) to the rubber surface during the cure of the adhesive, creating a weak layer in which the failure was produced. Chlorination with amounts of TCI up to 2 wt% produced a noticeable increase in T-peel strength, but treatment with higher amounts of TCI resulted in a decrease in joint strength. Although chlorination with TCI created chlorinated hydrocarbon groups and C-O moieties on the rubber surface, the surface in contact with the adhesive was additionally degraded and, consequently, the locus of failure of the joints varied in a manner which depended on the amount of TCI applied to the surface. Treatment with amounts of TCI up to 2 wt% did not greatly degrade the rubber surface and the mode of failure of the joint was mainly interfacial. Chlorination at higher TCI concentration produced a weak chlorinated surface layer which was was mechanically weak, facilitating the failure in this layer during the T-peel test. The thickness of the chlorinated layer created on the treated rubber is about 5 Fm, and the thickness seemed to be independent of the amount of TCI applied to the rubber surface.     

溶聚丁苯橡胶挤出畸变行为的研究

研究两种不同结构的溶聚丁苯橡胶(SSBR-T2003和SSBR-2305)生胶及混炼胶的挤出畸变行为及机理。结果表明:两种生胶挤出时均发生整体挤出畸变,其中SSBR-2305的畸变更严重,这与该胶料相对分子质量大、分子链结构为端基锡偶联有关,而畸变根源来自于口模入口区强烈的拉伸流动失稳。填充炭黑可显著改善SSBR熔体的挤出流变性能,抑止整体畸变。炭黑的加入不仅降低了胶料的熵弹性,同时有稳定入口区流场的作用。SSBR-2305混炼胶在高剪切速率下出现类似第二光滑挤出现象。