全钢载重子午线轮胎气密层胶配方改进

通过并用NR并加入适量陶土,对全钢载重子午线轮胎气密层胶配方进行改进.结果表明,改进后的气密层胶透气系数有所增大,但能够满足有内胎轮胎气密层的要求;采用改进配方的轮胎耐久性能和高速性能与改进前的轮胎相当;采用改进配方生产轮胎,可减小BIIR用量,大幅度降低生产成本.     

石蜡油在全钢载重子午线轮胎气密层中的应用

研究石蜡油在全钢载重子午线轮胎气密层中的应用,并与使用芳烃油的胶料进行性能对比.结果表明,全钢载重子午线轮胎气密层胶料中采用石蜡油替代芳烃油,胶料性能变化不大,压型工序复合时过渡层与气密层胶料能很好粘合,对胶料气密性无重大影响.成品轮胎耐久性能超过国家标准,速度性能达到企业要求.     

均匀剂在轮胎气密层胶中的应用研究

对国内外均匀剂进行沥青四组分分析、红外光谱分析、多环芳烃含量检测以及在轮胎气密层胶中的应用研究。结果表明：不同厂家均匀剂成分差异较大,多数产品沥青质含量较大;均匀剂能降低混炼胶门尼粘度,明显提高胶料加工安全性;均匀剂对胶料物理性能有较大影响;能明显改善填料在橡胶中的分散性;国产均匀剂气密性较好,国外均匀剂气密性较差,但国外均匀剂能满足欧盟环但指含尊求     

Santoweb~木质纤维素短纤维的性能及其在轮胎中的应用

介绍了Santoweb木质纤维素短纤维的独特结构和性能,讨论了其在胶料中的分散与加工中的取向对未硫化胶加工性能和硫化胶性能的影响等,列举了其在轮胎胎圈包布胶、三角胶、内衬层和胎面中的应用。Santoweb木质纤维素短纤维在降低生产成本的同时可以提高胶料的物理性能,从而改善轮胎性能,特别是胎面耐崩花掉块的性能。     

补强树脂SP6701在全钢载重子午线轮胎胎圈外护胶中的应用

研究补强树脂SP6701在全钢载重子午线轮胎胎圈外护胶中的应用。结果表明:在全钢载重子午线轮胎胎圈外护胶中用补强树脂SP6701代替部分炭黑,胶料的门尼粘度降低,炭黑分散性提高,加工工艺性能明显改善;硫化胶生热降低,撕裂强度提高;成品轮胎的耐久性能提高。     

改性氯磺化聚乙烯橡胶和空气阻止剂NM360在全钢载重子午线轮胎气密层胶中的应用

研究改性氯磺化聚乙烯橡胶(MCSM)和空气阻止剂NM360在全钢载重子午线轮胎气密层胶中的应用。结果表明,以MCSM部分替代溴化丁基橡胶,同时加入空气阻止剂NM360,并适当调整填充体系和硫化体系,胶料的硫化特性、物理性能和气密性能变化不大,工艺性能优异,成品轮胎的耐久性能满足使用要求,生产成本明显降低。     

原位改性纳米氧化镁/顺丁橡胶复合材料的制备与性能

采用原位改性的方法制备了硅烷偶联剂Si 75 改性纳米氧化镁/顺丁橡胶复合材料,通过橡胶加工分析仪、扫描电镜等研究了其硫化特性、物理机械性能及动态力学性能。结果表明,当改性剂的用量为填料质量的3%时能有效提高纳米氧化镁/顺丁橡胶胶料的硫化速率和交联程度,且硫化胶的综合物理机械性能最好; 与未改性氧化镁填充的顺丁橡胶相比,改性氧化镁与橡胶之间的相互作用得到了增强,纳米氧化镁在橡胶中的分散性有了较大程度的改善,从而提高了改性纳米氧化镁/顺丁橡胶硫化胶的物理机械性能和损耗因子。     

改性补强填料YB-5在半钢子午线轮胎气密层胶中的应用

研究改性补强填料YB-5在半钢子午线轮胎气密层胶中的应用。试验结果表明:在半钢子午线轮胎气密层胶中加入改性补强填料YB-5,同时调整天然橡胶与溴化丁基橡胶的并用比,减小炭黑N660用量,胶料的焦烧时间缩短,硫化速度加快;硫化胶的定伸应力减小,耐屈挠性能和气密性能提高,生热降低;改性补强填料YB-5的分散性优于碳酸钙;成品轮胎性能变化不大,生产成本降低。     

Improved dispersion and physico-mechanical properties of rubber/silica composites through new silane grafting

3-Octanoylthio-1-propyltriethoxysilane (a new silane) grafted styrene butadiene rubber/ silica composites were prepared in the present work, where grafting weight percentage of the base rubber (0%, 2%, 4%, and 6%) and filler content of the composites (0, 5, 15, 35, and 50 phr) were varied to investigate dispersion of the filler in the rubber. A detailed quantitative study of morphology-physical property relationship of the composites using dispersion degree parameter was carried out. Pronounced improvement of dispersion was observed with increasing grafting weight percentage of the base rubber. A mechanism of polymer to filler interaction was shown by Fourier transform infrared spectroscopy. The dispersion rate constant from the torque-time curve increased with the grafting percentage. Bound rubber content and Payne effect measurement indicated improved rubber-filler interaction for the grafted rubber compound. A relation between low strain modulus of the composites and grafting percentage was proposed. The nanoindentation studies gave further insight into the results. Other physico-mechanical properties at different grafting weight percentages at particular filler loading (50 phr) and at different filler loadings at a particular grafting weight percentage (4%) were evaluated. The improved mechanical and dynamic mechanical properties with increasing grafting weight percentage are an indication that this methodology could be used in green tire application.     

Exploring a highly dispersible silica–elastomer composite for tire applications

In this article, we provide an extensive analyses of various properties that are required for tire tread based on developed highly dispersible (HD) silica‐filled epoxidized natural rubber composites. Silica in an HD form has become a staple filler in tire tread applications because of its inherent advantages. In this study, epoxidized natural rubber with 25 mol % epoxide (ENR 25) and natural rubber were mixed with two different types of HD silica for superior reinforcement. A standard tire tread formulation was used as the base compound. The magic triangle properties were conspicuously influenced by the viscoelastic characteristics of the vulcanizates. The introduction of polar rubber (ENR 25) into the HD silica greatly improved rheological, physicomechanical, bound rubber content, and dynamic mechanical properties, and this led to a better, fuel‐efficient tire. We successfully achieved this, even in the absence of a silane coupling agent. ENR 25 played an imperative role in showing an extraordinary rubber–filler interactions and was primarily responsible for these observations. In this study, we explored the HD silica dispersion with transmission electron microscopy observations. Morphological studies revealed well‐dispersed HD silica with the formation of a rubber–filler network. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133, 43531.     

Improvement of properties of silica‐filled natural rubber compounds using polychloroprene

Because silica has strong filler–filler interactions, a silica‐filled rubber compound is characterized by a poor dispersion of the filler. Properties of silica‐filled natural rubber (NR) compounds were improved using polychloroprene (chloroprene rubber [CR]). The bound rubber content of the compound increases and the filler dispersion is also improved by adding CR to the compound. Physical properties such as modulus, tensile strength, abrasion, and crack resistance are improved by adding CR. Elongation at break of the vulcanizates containing CR is longer than that of the vulcanizate without CR, although crosslink density of the former is higher than that of the latter. The improved physical properties are attributed to the good dispersion of silica by adding CR. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 83: 2609–2616, 2002     

载重子午线轮胎胎面胶配方改进

对载重子午线轮胎胎面胶配方进行改进,以提高耐磨性能。试验结果表明,通过调整生胶品种、补强体系和硫化体系等,可以改善胎面胶的耐磨性能,降低胶料成本。以采用耐磨性能较好的中超耐磨炭黑N220,采用NR/BR并用体系、中超耐磨炭黑N234,补强体系与原配方接近为特征的3种改进配方分别适用于客运和中短途货运车辆轮胎、高速路面长途客运和货运车辆轮胎、混合花纹轮胎。     

The behavior of natural rubber–epoxidized natural rubber–silica composites based on wet masterbatch technique

Natural rubber–epoxidized natural rubber–silica composites were prepared by the wet masterbatch technique and the traditional dry mixing method. Performances of the composites based on different preparation methods were investigated with a moving die rheometer, an electronic universal testing machine, a dynamic mechanical analyzer, a nuclear magnetic resonance crosslink density analyzer, a rubber processing analyzer (RPA), a scanning electron microscope (SEM), and a transmission electron microscope (TEM). The RPA, SEM, and TEM analyses indicated that silica has better dispersion, lower filler–filler interaction, and better filler–rubber interaction in compounds based on the wet masterbatch technique, leading to improvements in mechanical strength and the dynamic mechanical and compression properties of the composites. It also indicates that composites prepared by the wet masterbatch technique have shorter scorch time, faster curing velocity, and higher crosslink density. The composites prepared by the wet materbatch technique also have lower rolling resistance, which is an important property for their use as a green material for the tire industry. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133, 43571.     

聚苯胺/改性胶粉导电材料的制备及其性能研究

将废旧轮胎胶粉用硅烷偶联剂(KH-560)处理得到改性胶粉,然后以过硫酸铵为引发剂,采用化学原位聚合法制备了聚苯胺/改性胶粉导电材料。采用傅里叶变换红外光谱仪(FTIR)、扫描电子显微镜(SEM)、能谱仪(EDS)、四探针测试仪及电化学工作站等仪器,研究了原料配比、反应温度、反应时间对聚苯胺/改性胶粉导电材料导电性能的影响,并分析了胶粉改性及复合材料导电机理。结果表明,通过改性能明显提高胶粉分散性能;当温度为10 ℃,过硫酸铵与苯胺摩尔比为1∶1,盐酸浓度为1.0 mol/L,反应时间10 h时,制得的聚苯胺/改性胶粉导电材料的电导率为4.79 S/cm。     

改性补强填料YB-5在全钢载重子午线轮胎气密层胶中的应用

研究改性补强填料YB-5在全钢载重子午线轮胎气密层胶中的应用。试验结果表明,在全钢载重子午线轮胎气密层胶中加入改性补强填料YB-5,硫化胶的密度略有增大,硬度和定伸应力增大,气密性能提高,其他性能变化不大,且胶料成本降低。     

Influence of nanoclay‐carbon black hybrid fillers on cure and properties of natural rubber compounds

The influence of organically modified nanoclay‐carbon black (CB) hybrid filler on the curing behavior of natural rubber (NR) was explored in this investigation. Here an effort was paid to understand the curing kinetics of organomodified nanoclay filled rubber compounds. On the basis of two different types of modified clay, NR nanocomposites were prepared and cured by a conventional vulcanization system. A faster curing rate and lower torque values were found when the modification was done by quaternary ammonium compounds. The activation energy of the rubber curing process decreased with the incorporation of nanoclay. In addition, it was revealed that the quaternary ammonium compounds used as modifier in the clay show a plasticization effect. Additionally, X‐ray diffraction studies indicated, that the basal spacing of the clay minerals was increased in both cases after incorporation in the rubber matrix. The dynamic mechanical analysis using a strain sweep mode showed that the Payne effect decreases because of an improved dispersion of CB induced by the presence of nanoclay. POLYM. ENG. SCI., 2013. © 2012 Society of Plastics Engineers     

Improvement of properties of silica‐filled styrene–butadiene rubber compounds using acrylonitrile–butadiene rubber

Since silica has strong filler–filler interactions and adsorbs polar materials, a silica‐filled rubber compound has a poor dispersion of the filler and poor cure characteristics. Improvement of the properties of silica‐filled styrene–butadiene rubber (SBR) compounds was studied using acrylonitrile–butadiene rubber (NBR). Viscosities and bound rubber contents of the compounds became lower by adding NBR to the compound. Cure characteristics of the compounds were improved by adding NBR. Physical properties such as modulus, tensile strength, heat buildup, abrasion, and crack resistance were also improved by adding NBR. Both wet traction and rolling resistance of the vulcanizates containing NBR were better than were those of the vulcanizate without NBR. The NBR effects in the silica‐filled SBR compounds were compared with the carbon black‐filled compounds. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 79: 1127–1133, 2001     

多功能助剂KLF-808在全钢载重子午线轮胎中的应用

试验研究多功能助剂KLF-808在全钢载重子午线轮胎中的应用效果。结果表明,在全钢载重子午线轮胎胎面胶、下三角胶和外护胶中加入KLF-808,可以降低胶料的门尼粘度,提高胶料的抗硫化返原性能,降低硫化胶的压缩生热,提高成品轮胎的耐久性能;在胎面胶中加入KLF-808,可以提高硫化胶的耐磨和抗刺扎性能。     

溴化丁基母胶在全钢载重子午线轮胎气密层中的应用

研究溴化丁基母胶在全钢载重子午线轮胎气密层中的应用。结果表明:轮胎气密层配方中采用20份溴化丁基母胶等量替代溴化丁基橡胶和补强剂后,胶料的物理性能变化不大,气密性能保持一致,加工性能满足工艺要求,成品轮胎各项性能达到国家标准要求,每条轮胎可降低成本2.96元。