溶聚丁苯橡胶2557-A在轮胎中的应用

按照纯炭黑配方,将溶聚丁苯橡胶(SSBR,牌号为2557-A)同乳聚丁苯橡胶(ESBR,牌号为1712)对比应用于全钢和半钢子午线轮胎胎冠胶配方中,确定了合适的胎冠胶配方,且进行了轮胎的试制和性能检测。结果表明,与ESBR 1712全钢胎冠胶相比,同等用量SSBR 2557-A的胎冠胶拉伸强度、定伸应力、Akron磨耗性能和压缩生热等性能均得到提高,但DIN磨耗性能有所下降,且具有更优的抗湿滑性和更低的滚动阻力;与ESBR 1712半钢胎冠胶相比,SSBR 2557-A胎冠胶具有优异的抗湿滑性能,而其他性能相差不大;采用SSBR 2557-A全钢子午线轮胎胎冠胶配方试制的轮胎顺利通过了耐久性试验;采用SSBR 2557-A半钢子午线轮胎胎冠胶配方试制轮胎的外缘尺寸、强度、脱圈阻力和高速性能、耐久性均达到国家标准,且还能够较大幅度提高轮胎的抗湿滑性能和滚动噪音性能。     

溶聚丁苯橡胶/白碳黑复合料在高性能胎面胶中的性能研究

本文对充不同环保橡胶油溶聚丁苯橡胶(SSBR)在高性能轮胎胎面胶中的性能进行了研究,特别是SSBR(ZG-SSBR)与同类国产及进口产品在加工行为及物理性能等方面进行了对比。 结果表明,ZG-SSBR具有卓越的加工性能、优越的物理机械性能、较低的滚动阻力、优良的抗湿滑性、在低或高充油量下胎面胶的综合性能不亚于进口同类产品,ZG-SSBR是高性能轮胎胎面胶料的理想材料。     

铁系乙烯基丁二烯橡胶/天然橡胶共混物的性能

研究了铁系乙烯基丁二烯橡胶(FVBR)与天然橡胶(NR)以50/50(质量比)共混硫化胶的物理机械性能和黏弹特性,并与溶聚丁苯橡胶(SSBR)与NR共混胶进行了对比。结果表明,FVBR与NR有良好的相容性,共混胶只存在1个玻璃化转变温度。FVBR/NR的混炼行为良好,但必需添加操作油,否则难以获得理想的硫化胶性能。FVBR/NR与SSBR/NR相似,不仅具有良好的拉伸和撕裂性能,而且具有高抗湿滑性;其生热和滚动阻力以及热老化性能优于后者,但耐磨性略逊于SSBR/NR。     

炭黑在天然橡胶/溶聚丁苯橡胶硫化胶中的分散及其对性能的影响

考察了溶聚丁苯橡胶(SSBR)用量、炭黑的种类及用量对天然橡胶(NR)/SSBR硫化胶动态力学性能和力学性能的影响.结果表明,炭黑与SSBR的结合作用比与NR弱;随SSBR用量的增加,炭黑在NR/SSBR共混硫化胶中的分散性提高,Payne效应减弱,频率敏感性增强;随SSBR用量的增加,NR/SSBR共混硫化胶的拉伸强度和撕裂强度减小,扯断伸长率变化不大;而定伸应力则呈先减小后增大的趋势;随不同种类的炭黑在NR/SSBR硫化胶中分散性的提高,定伸应力呈上升趋势,损耗因子和压缩生热呈减小趋势.     

高性能轮胎胎面胶的研究进展

综述了近些年来国内外文献,讨论了高性能胎面胶的研究进展和开发现状。评述了溶聚丁苯胺（SSBR）、集成橡胶SIBR、天然橡胶等经改性或并用后作为胎面胶的优缺点。     

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.     

Vulcanization accelerator functionalized nanosilica: Effect on the reinforcement behavior of SSBR/BR

The application of nanosilica in high performance tire highly depends on its uniform dispersion in rubber matrix. A series of dispersible nanosilica (denoted as DNS) modified by diphenyl guanidine (denoted as DPG, a vulcanization accelerator) were synthesized by liquid phase in situ surface chemical modification. The structure of the as‐obtained DNS‐DPG fillers was investigated in relation to Fourier transform infrared spectrometric analysis, thermogravimetric analysis, dynamic light scattering test, and transmission electron microscopic observation. It was found that the rubber vulcanization accelerator DPG was successfully grafted onto the surface of nanosilica, thereby effectively preventing the silica nanoparticles from agglomeration and significantly reducing the average particle size. The reinforcing effect of the DPG‐modified DNS nano‐fillers for the solution polymerized styrene butadiene rubber/butadiene rubber (denoted as SSBR/BR) was dependent on the fraction of the modifier DPG; in particular, when the amount of modifier DPG is 135.25 mmol/kg (denoted as DNS‐DPG‐3), silica exhibited very homogeneous dispersion in the SSBR/BR matrix, which contributed to significantly enhancing the filler‐rubber compatibility. As a result, SSBR/BR/DNS‐DPG‐3 nanocomposite exhibited the best mechanical properties, integrated high abrasion resistance and low rolling resistance. The modified silica not only possessed the effect of accelerating the crosslinking reaction, but also showed the reinforcing effect. This could make it feasible for SSBR/BR/DNS‐DPG nanocomposite to find promising application in green tire tread. POLYM. ENG. SCI., 59:1270–1278 2019. © 2019 Society of Plastics Engineers     

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。     

几种胎面用橡胶及其混炼胶的应力弛豫特性

研究了4种胎面用胶[星形全偶联溶聚丁苯橡胶(S-SSBR)、偶联度为40%的SSBR 2305、乳聚丁苯橡胶(ESBR),顺丁橡胶(BR)]生胶及其混炼胶的应力弛豫特性,分析了弛豫机理,考察了混炼胶的应力弛豫和挤出膨胀性能间的关系.结果表明,4种生胶及其混炼胶的应力弛豫过程均表现出快速和缓慢弛豫2个阶段;生胶的应力弛豫机理:ESBR和BR为缠结分子链束和自由分子链解取向过程,2种SSBR为锡偶联分子链束和分子链的解取向过程;4种混炼胶的弛豫机理为橡胶-炭黑变形网络的回缩和分子链受阻解取向过程;2种SSBR生胶及混炼胶的快速弛豫阶段更显著;在实验温度范围,随着温度升高,2种SSBR的弛豫时间明显缩短,ESBR略有缩短,BR变化不大.2种SSBR生胶与混炼胶的应力弛豫时间比值远大于ESBR和BR;2种SSBR混炼胶的应力弛豫时间短,挤出膨胀比小.     

Development of novel elastomeric blends containing natural rubber and ultra-low-density polyethylene

This study sought to develop novel elastomeric compounds using natural rubber (NR) and ultra-low-density polyethylene (ULDPE). Blends were prepared by means of a two-roll mill for three ratios (70/30, 60/40, and 50/50 NR/ULDPE). Conventional vulcanization was performed in a compression mold. The physical and mechanical properties of the blend were determined according to ASTM standards. The results were compared with those obtained from NR blended with styrene-butadiene rubber (SBR). The morphological examinations with scanning electron microscopy indicated that ULDPE was compatible with NR; thus, the addition of a compatibilizer was not necessary. The cocontinuous phase was dominant in the NR/ULDPE blend containing 50 and 60 wt % NR. The tensile properties, tear resistance, and aging resistance of the NR/ULDPE blends were found to be superior to those of NR/SBR blends. On the other hand, the abrasion and flex cracking resistances of the NR/ULDPE blend were inferior to those exhibited by SBR blends but the Mooney viscosity and resilience of both blends fell in the same range. However, the addition of dicumyl peroxide appeared to have caused crosslinking of the ULDPE phase in the blend, which in turn increased the tensile properties and abrasion and aging resistance. The properties of the tertiary NR/SBR/ULDPE blend were investigated as well. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 82: 650–660, 2001     

溶聚丁苯橡胶RC2557S在轿车子午线轮胎胎面胶中的应用

研究溶聚丁苯橡胶（SSBR）RC2557S在轿车子午线轮胎胎面胶中的应用,并与进口SSBR进行对比.结果表明,SSBR RC2557S能够满足欧盟环保要求,其微观结构、硫化特性、物理性能和动态力学性能与进口同类产品相近.采用SSBR RC2557S生产轿车子午线轮胎胎面胶,成品轮胎的滚动阻力达到C级,湿地抓着性能达到B级,符合出口欧盟的要求.     

超细全硫化粉末丁苯橡胶对胎面胶性能的影响

研究超细全硫化粉末丁苯橡胶（UFPSBR）对天然橡胶（NR）/丁苯橡胶/顺丁橡胶（BR）胎面胶性能的影响。结果表明：与未加UFPSBR的胎面胶相比,加入2～3份UFPSBR的NR/溶聚丁苯橡胶/BR胎面胶拉伸强度略有减小,耐磨性能和抗湿滑性能提高,生热降低;加入1～2份UFPSBR的NR/乳聚丁苯橡胶/BR胎面胶拉伸强度增大,抗湿滑性能略有提高,滚动阻力变化不大,耐磨性能下降。     

我国溶聚丁苯橡胶发展速度问题

介绍了溶聚丁苯橡胶(SSBR)和乳聚丁苯橡胶(ESBR)在轮胎工业中的发展现状及其性能对比,分析认为,SSBR在发达国家大部分只用于高性能轮胎。而我国目前高性能轮胎需求量较少,车速级别绝大部分都在S和T速度级即车速180 km/h以下,ESBR已能满足要求,国内市场对SSBR需求量不大。因此近期我国SSBR的发展应是培育和开发市场,而不是迅速扩大生产能力。     

UFPSBR对NR胎面胶性能的影响

将超细全硫化粉末丁苯橡胶（UFPSBR）加入到常用的NR胎面胶体系中,研究其对NR胎面胶性能的影响。力学性能测试结果表明,添加5份经饱和食盐水处理的UFPSBR后NR拉伸强度最大（25．36MPa）,比空白试样提高了18．45％;磨耗量最小（0．1600cm^3／1．61km）,比空白试样减少了33．85％,耐磨耗性最好。定负荷压缩生热和DMA分析测试结果表明,UFPSBR的加入可以提高NR胎面胶的抗湿滑性能,同时,对滚动阻力及生热性能方面的负面影响不大。     

Enhancing silica dispersion and interfacial interaction in styrene butadiene/silica rubber composites by using epoxidized styrene butadiene rubber as interfacial compatibilizer

It is usually desired but often challenging to improve the wet traction, and reduce the abrasion and rolling resistance simultaneously in tread rubber, which is referred to as “magic triangle” in tire industry. To fulfill this goal, the filler dispersion and interfacial interaction required to be improved, as they are two essential factors to concurrently govern the ultimate properties of rubber composites. Herein, we synthesized the epoxidized solution polymerized styrene butadiene rubber (ESSBR) with different epoxy level, and used them as interfacial compatibilizer to promote the silica dispersion and silica/rubber interfacial interaction. The epoxy of ESSBR would react with silanol on silica surface and co-crosslink with SSBR simultaneously, therefore build a strong bridge between rubber matrix and filler. By incorporation of 20 phr of ESSBR-15% (15% of double bonds on main chain was epoxidized), the wet grip was improved by 40%, and DIN abrasion and rolling resistance were reduced by 38% and 21%, respectively with hardly sacrifice the mechanical properties. We envisage that this study provides an approach for the fabrication of rubber composites with improved silica dispersion and strengthened interfacial interaction.     

Crack resistance improvement of rubber blend by a filler network of graphene

Crack resistance of rubbers is of vital importance in many applications (e.g., tire and shock absorber). In this work, we demonstrate the crack resistance improvement and toughening of natural rubber–solution polymerized butadiene styrene rubber (NR–SSBR) blend by designing a filler network composed of graphene (GE). The well-dispersed GE nanosheets contact with each other and bridge the adjacent GE nanosheets based on the π–π conjugation interaction, which preferentially break upon deformation and dissipate energy before the failure of the materials. The mechanisms of energy dissipation under small and large strains were further discussed. The approach of crack-tip morphology monitoring was also applied to understand the crack resistance behavior of the rubber material. The GE network and its energy dissipation not only increase the tensile strength and toughness, but also enhance the crack resistance of the NR–SSBR by expanding the tear energy region of high cracking energy dissipation. Improvement on these properties will provide the rubber blend with better long-term sustainability in practical applications. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136, 47278.     

Preparation,structure, and properties of solution-polymerized styrene-butadiene rubber with functionalized end-groups and its silica-filled composites

With anionic polymerization, the solution-polymerized styrene-butadiene rubber (SSBR) and solution-polymerized styrene-butadiene rubber with alkoxysilane-functionalization at two ends of macromolecular chains (A-SSBR) were synthesized by dilithium as initiator. The occurrences of end-group functionalization and condensation reaction were confirmed, but also the molecular structure parameters and end-functionalized efficiency of A-SSBR grafted alkoxysilane groups onto the ends of its macromolecular chains were calculated through the characterizations. By this novel structural modification, there were chemical bondings rather than conventional physical adsorption between silica and rubber matrix. This novel technology was beneficial to not only immobilizing the free chain ends to decrease the amount of macromolecular chains' free terminals, but also chemically bonding the rubber chains on the surfaces of silica particles to enhance the filler-polymer interaction significantly. Furthermore, the covering layer of end-functionalized macromolecular chains around the silica particles was conducive to reducing the silica agglomeration and improving the silica dispersion. The structures, morphologies, and properties of SiO₂/SSBR and SiO₂/A-SSBR composites prepared by co-coagulation and mechanical blending, were investigated. The results showed that SiO₂/A-SSBR composites behaved better comprehensive performances including higher wet skid resistance and lower rolling resistance than SiO₂/SSBR composites. Consequently, A-SSBR was an ideal material for the green tire treads.     

环保型溶聚丁苯橡胶/顺丁橡胶并用胶与白炭黑的相互作用研究

探讨了国产环保型溶聚丁苯橡胶SSBR2564S和端基硅偶联SSBR72612S在半钢子午胎胎面胶中的应用,研究了两种SSBR与BR并用对白炭黑分散性的影响,并进一步考查了各并用体系混炼胶和硫化胶的基本性能。结果表明：BR与白炭黑的相互作用较SSBR要弱,SSBR更利于白炭黑的分散,端基硅偶联SSBR与白炭黑的相互作用更强;BR能有效缩短并用胶的硫化时间,改善SSBR72612S的加工性能;随BR并用量的增加,硫化胶的耐磨性得到明显改善,断裂伸长率、撕裂强度和回弹均有所提升,而300%定伸应力降低。BR能降低SSBR2564S体系的滚动阻力,但使两种SSBR体系的抗湿滑性损失较大。     

环保型丁苯胶SBR1502E在农业子午线轮胎中的应用

研究环保型丁苯胶SBR1502E在农业子午线轮胎胎面胶和胎体帘布胶中的应用。结果表明：用环保型丁苯胶SBR1502E等量代替丁苯胶SBR1502,胎面胶的挤出性能明显改善,排胶温度降低,压延帘布温度降低,覆胶均匀,成型工艺性能良好,拉伸性能变化不大,门尼粘度明显降低,生热降低,弹性提高,耐磨性能及H抽出性能改善、耐热老化性能变化不大;成品轮胎的物理性能变化不大。     

纯化改性乳聚丁苯橡胶的性能研究

用提纯的方法改性乳聚丁苯橡胶(ESBR),对比改性ESBR(TSBR)、ESBR和溶聚丁苯橡胶(SSBR)的加工工艺和物理性能,并考察3种丁苯橡胶(SBR)与天然橡胶(NR)和顺丁橡胶(BR)并用制备胎面胶的性能。结果表明:TSBR的炭黑分散性、硫化特性和物理性能较ESBR好,生热降低;弹性优于SSBR。TSBR可用于高性能轮胎胎面胶。