锡偶联型SSBR的动态行为

研究了锡产型ＳＳＢＲ混炼胶及其硫化胶的动态力学性能,并与ＥＳＢＲ做了对比。结果表明,锡偶联型ＳＳＢＲ混炼胶比ＥＳＢＲ,的弛豫速度快,挤出胀在效应小,塑／弹比随频率减小的幅度大;锡偶联型ＳＳＢＲ硫化胶的ｔａｎδ比ＥＳＢＲ的小,生热低;日本产牌号为ＳＬ５５２胶料的ｔａｎδ随形变而增值幅度小的现象的体现了锡偶联结构有助于炭黑的高度分散及提高大分子与炭黑间结合强度。     

用正交旋转设计法探讨绿色轮胎胎面胶配方设计

用三元二次通用正交旋转设计法研究了变量偶联型Ｓ－ＳＢＲ／ＢＲ,促进剂ＤＭ／Ｄ、炭黑／白炭黑与硫化胶物理性能的关系,得到一系列变量与性能的等高图,揭示了诸因素之间的内在规律。研究表明,增大白炭黑用量及偶联型Ｓ－ＳＢＲ／ＢＲ的并用比例有利于提高胶料的抗撕裂性能,炭黑与促进剂的用量直接影响着胶料的３００％定伸应力。     

纳米碳酸钙对溶聚丁苯橡胶胶料的补强作用

探讨了纳米碳酸钙中白燕华ＣＣ对溶聚丁苯橡胶（ＳＳＢＲ）胶料的补强作用。结果表明,白燕华ＣＣ与Ｓ－ＳＢＲ的混炼加工工艺完全可行;单用白燕华ＣＣ作补强填料时,随着其用量的增大,ＳＳＢＲ胶料的硫化速度加快,性能显著提高,硬度变化不大;白燕华ＣＣ与ＨＡＦ并用具有协同作用。可使Ｓ－ＳＢＲ胶料的物理性能满足实际使用要求;白燕华ＣＣ／ＨＡＦ并用的Ｓ－ＳＢＲ／ＮＲ和Ｓ－ＳＢＲ／ＢＲ并用胶硫化速度较快,加工性能和物     

纳米碳酸钙对溶聚丁苯橡胶胶料的补强作用

探讨了纳米碳酸钙中白燕华ＣＣ对溶聚丁苯橡胶（ＳＳＢＲ）胶料的补强作用。结果表明,白燕华ＣＣ与ＳＳＢＲ的混炼加工工艺完全可行;单用白燕华ＣＣ作补强填料时,随着其用量的增大,ＳＳＢＲ胶料的硫化速度加快,强力性能显著提高,硬度变化不大;白燕华ＣＣ与ＨＡＦ并用具有协同作用,可使ＳＳＢＲ胶料的物理性能满足实际使用要求;白燕华ＣＣ／ＨＡＦ并用的ＳＳＢＲ／ＮＲ和ＳＳＢＲ／ＢＲ并用胶硫化速度较快,加工性能和物理性能较好     

锡偶联型溶聚丁苯胶性能评价

本文研究了具有适宜的苯乙烯、乙烯基含量及其配比的１５立升釜聚合的锡偶联型溶聚丁苯橡胶（Ｓ－ＳＢＲ）的硫化及力学性能、古德里奇疲劳温升、动态力学及摩擦性能，并与低温乳聚丁苯橡胶（Ｅ－ＳＢＲ）进行了平行对比。结果表明，锡偶联型Ｓ－ＳＢＲ是一种集较佳的静态性能、优异的动态性能、令人满意的安全及低能耗性为一体的新型胎面材料。     

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。     

蜗轮冷冻粉碎胶粉在SBR中的应用研究

对蜗轮冷冻粉碎胶粉的性能及其在ＳＢＲ中的应用进行了研究。结果表明,蜗轮冷冻粉碎胶粉由于具有纤维含量少、粒子呈圆球形、细粒子级分多、活性较大等特点,能单独制成胶料生产一般橡胶制品;在ＳＢＲ中的用量比普通机械粉碎胶粉大,从而可降低胶料成本;可降低ＳＢＲ胶料的动态生热性     

改性胶粉/SBR共混胶料的结构性能研究

研究了硫黄、促进剂、改性胶粉用量对胶粉／ＳＢＲ共混胶料性能的影响。结果表明；改性胶粉用量在１０－３５份的范围内．对共混胶料的静态力学性能影响不大：在１０－２２份的范围内对动态压缩疲劳生热影响不大．适当调整基质胶中硫黄、促进剂的用量．有利于降低胶料的动态压缩疲劳生热。扫描电子能谱微区分析的研究表明：由于硫黄的迁移形成了具有特殊结构的界面过渡层．该过渡层是降低动态压缩疲劳生热的关键。     

稀土顺丁橡胶／SBR体系的力学性能

稀土顺丁橡胶与丁苯橡胶（ＳＢＲ）共混，可以改善ＳＢＲ的耐低温性能。当稀土顺丁橡胶／ＳＢＲ（质量比）这２０／８０时，－３０℃的ｔａｎδ仅小于ＳＢＲ，６０℃的ｔａｎδ最小。其共混胶的应力－应变性能、湿滑指数、磨耗及生热性能均优于镍系顺丁橡胶／ＳＢＲ共混体系。     

全SR农业轮胎胎面胶的研制

从既降低成本又能逃跑农业轮胎胎面胶的各项性能要求出发,同时根据ＳＲ的性能及工艺,设计配方进行优化,确定了Ｓ－ＳＢＲ／ＢＲ并用（并用比６０／４０＿,增大硫黄和软化增粘剂的用量,Ｎ２２０和Ｎ３３０并用（６３份）作为补强填充剂,三苯二胺为防老剂作为主要防老剂的胶料配方,同时适当调整了加工工艺。试验结果表明,该西方不仅满足了农业轮胎面面胶的性能要求,而且与现生产农业轮胎胎面胶相比,胶料成本降低３６３元．ｔ     

均匀设计方法在S-SBR/NR/BR三元共混胎面胶配方设计中的应用

采用均匀设计方法对溶聚丁苯橡胶 (S SBR) /NR/BR三元共混胎面胶配方进行了预测和优选 ,并用三角坐标图表征了生胶并用比与硫化胶物理性能 ,尤其是生热性能的关系。研究结果表明 ,当S SBR/NR/BR并用比为 60 /10 /30或 60 /2 0 /2 0时 ,胎面胶的物理性能较好     

低滞后炭黑在轮胎胎面胶中的应用

研究了低滞后炭黑Z－271和Z－281对SBR／BR普用胶料物理性能及动态粘弹性能的影响,试验结果表明,在SBR／BR并用胶中加入滞后炭黑Z－281可以显著降低胶料生热及轮胎的滚动阻力,而胶料其它性能无明显变化。     

TPI/HVBR共混物用于胎面胶的研究

在传统的胎面胶配方NR／SBR1500（并用此为60／40）和SBR1712／SBR1500（并用比为60／40）的基础上，采用高反式－1，4－聚异成二烯（TPI）和／或高乙烯基聚丁二烯橡胶（HVBR）取代或部分取代SBR1500，研究共混物的物理性能和动态粘弹性。结果表明，添加了TPI和HVBR的胎面胶，其力学性性能可满足使用要求，定伸应力和抗屈挠疲劳性较大提高，滚动阻力和动态生势明显降低，而抗湿滑性仍有较高的保持率，达到了滚动阻力和抗湿润性能的良好兼备。相对而言，NR／TPI／HVBR并用胎面胶具有量的滚动阻力和生热，而SBR／TPI／HVBR并用胎面胶具有更好的抗湿滑性、抗屈挠疲劳性和耐磨性。     

NR/SBR并用胶的研究

采用傅立叶变换红外光谱（FTIR）分析了溶聚丁苯橡胶（S－SBR）S－SBR2305,Buna SL25-1及乳聚丁苯橡胶E－SBR15003种SBR的链化学结构,采用定负荷压缩生热,动态力学谱（DMA）等方法研究了3种SBR对NR／SBR并用胶耐磨性,生热,滚动阻力及抗湿滑性的影响,结果表明,S－SBR对调节NR／SBR并用胶各方面性能具有比较突出的优越性,可以实现NR／SBR并胶的耐磨性,抗湿滑性和低滚动阻力三的平衡。     

Silica‐modified SBR/BR blends

The purpose of this article is that the silica‐modified SBR/BR blend replaces natural rubber (NR) in some application fields. The styrene‐butadiene rubber (SBR) and cis‐butadiene rubber (BR) blend was modified, in which silica filler was treated with the r‐Aminopropyltriethoxysilane (KH‐550) as a coupling agent, to improve mechanical and thermal properties, and compatibilities. The optimum formula and cure condition were determined by testing the properties of SBR/BR blend. The properties of NR and the silica‐modified SBR/BR blend were compared. The results show that the optimum formulawas 80/20 SBR/BR, 2.5 phr dicumyl peroxide (DCP), 45 phr silica and 2.5 mL KH‐550. The best cure condition was at 150°C for 25 min under 10 MPa. The mechanical and thermal properties of SBR/BR blend were obviously modified, in which the silica filler treated with KH‐550. The compatibility of SBR/BR blend with DCP was better than those with benzoyl peroxide (BPO) and DCP/BPO. The crosslinking bonds between modified silica and rubbers were proved by Fourier transform infrared analysis, and the compatibility of SBR and BR was proved by polarized light microscopy (PLM) analysis. The silica‐modified SBR/BR blend can substitute for NR in the specific application fields. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011.     

Tin‐coupled star‐shaped block copolymer of styrene and butadiene (II) properties and application

A novel tin‐coupled star‐shaped block copolymer (SB‐B)₄Sn was synthesized by anionic polymeric techniques. This new copolymer exhibited two different types: One was star‐shaped polybutadiene‐b‐poly(butadiene‐ran‐styrene) (S‐PB‐PSB), and the other was star‐shaped polybutadiene‐b‐poly(butadiene‐ran‐styrene)‐b‐polystyrene (S‐PB‐PSB‐PS). In this article, properties of (SB‐B)₄Sn were contrasted with that of tin‐coupled star‐shaped random styrene‐butadiene rubber (S‐SBR) and S‐SBR/cis‐BR blend rubbers. Physical property testing results showed that (SB‐B)₄Sn possessed good mechanical properties like S‐SBR. Rheological study indicated that these star‐shaped block copolymers had good processing properties. Rubber processing analyzer (RPA) spectra showed that the dispersion of additives in (SB‐B)₄Sn and S‐SBR/cis‐BR blend rubber was much better than that in S‐SBR. Dynamic mechanical thermal analyzer (DMTA) spectra showed that (SB‐B)₄Sn had a good combination of low rolling resistance and high wet skid resistance, which made it satisfactory materials to produce high performance tire tread. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2009     

Carbon black distribution driven by its concentration and its effect on physico-mechanical properties of styrene butadiene rubber and butadiene rubber miscible rubber blends

This paper discusses the influence of partitioning of carbon black (CB) with its increasing concentration (i.e., 10, 20, 30, 40, and 50 phr) on physical and static mechanical properties of Styrene Butadiene Rubber (SBR)/Butadiene Rubber (BR) rubber–rubber blends (RRB's) in 70SBR:30BR blend ratio. Partitioning of CB towards BR in CB-filled SBR/BR RRB's is quantitatively determined via dynamic mechanical analysis (DMA). DMA confirmed increased partitioning of CB towards BR phase with increasing CB. DMA data on the partitioning of CB towards BR were in good agreement with nuclear magnetic spectra obtained by solid-state nuclear magnetic resonance spectroscopy (SS-NMR spectroscopy). Curing properties, relative density, hardness, tensile test, tear test, and transmission electron microscopy (TEM) on CB filled SBR/BR RRB's were carried out to determine the effect of increasing concentration of CB on physical, mechanical, and dispersion characteristics in comparison to neat SBR/BR RRB's.     

Experimental studies of the relationship of processing to the crack growth of carbon-black-loaded SBR—cis-polybutadiene compounds

The crack growth of a highly carbon-black-loaded SBR—cis-polybutadiene (BR) blend is investigated as a function of the distribution of carbon black in the individual rubber phases. The blend compound consists of SBR/BR/carbon black/oil = 60/40/85/60 by weight ratio and curatives. A new “old process” is devised to control the carbon black distribution in the individual rubber phases, that is, cross mixing the SBR and BR black master batches with different amounts of carbon black in the SBR and BR patches. The results show that crack growth is very sensitive to the carbon black distribution. A better crack growth resistance compound is seen containing proportionately more carbon black in the major rubber SBR phase. A simple analogy of rubber blends to the rubber-modified thermoplastics is proposed to interpret these findings. The heat buildup of the blends is also affected by the carbon black distribution. A low heat buildup compound is observed in the system in which more carbon black is in the SBR batch, which is also a better crack growth resistance compound. It is not unexpected that the strength of rubbers decreases with increase of temperature, and so the rate of crack growth becomes faster as heat builds up.     

充环保油溶聚丁苯橡胶的制备及在高性能轮胎胎面胶中的应用

以自制路易斯碱为调节剂（调节剂T）、正丁基锂为引发剂,采用阴离子聚合法、填充环保型芳烃油RAE制备环保型高乙烯基溶聚丁苯橡胶（HVSBR）,并对比研究了几种胎面用丁苯橡胶与顺丁橡胶（BR）并用胶的性能。结果表明：少量的调节剂T有助于合成相对分子质量分布宽、加工性能好的HVSBR,乙烯基质量分数可达0.6～0.7;HVSBR/BR并用胶的综合物理性能、耐磨性能和动态力学性能较好,压缩疲劳温升和永久变形较小。     

Improvement of the homogeneity of SBR/NBR blends using polyglycidylmethacrylate‐g‐butadiene rubber

Polyglycidylmethacrylate grafted butadiene rubber (PGMA‐g‐BR) was synthesized by a graft solution copolymerization technique. The PGMA content was determined through titration against HBr. The PGMA‐g‐BR was blended with styrene butadiene rubber/butadiene acrylonitrile rubber (SBR/NBR) blends with different blend ratios. The SBR/NBR (50/50) blend was selected to examine the compatibility of such blends. Compatibility was examined using scanning electron microscopy (SEM), differential scanning calorimetry (DSC), and viscosity measurements. The scanning electron micrographs illustrate the change of morphology of the SBR/NBR rubber blend as a result of the incorporation of PGMA‐g‐BR onto that blend. The T_gs of SBR and NBR in the blend get closer upon incorporation of PGMA‐g‐BR 10 phr, which indicates improvement in blend homogeneity. The intrinsic viscosity (η) versus blend ratio graph shows a straight‐line relationship, indicating some degree of compatibility. Thermal stability of the compatibilized and uncompatibilized rubber blend vulcanizates was investigated by determination of the physicomechanical properties before and after accelerated thermal aging. Of all the vulcanizates with different blend ratios under investigation, the SBR/NBR (25/75) compatibilized blend possessed the best thermal stability. However, the SBR/NBR (75/25) compatibilized blend possessed the best swelling performance in brake fluid. The effect of various combinations of inorganic fillers on the physicomechanical properties of that blend, before and after accelerated thermal aging, was studied in the presence and absence of PGMA‐g‐BR. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 99: 1559–1567, 2006