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以自制液体异戊二烯橡胶(ZLIR)增塑乳聚丁苯橡胶(ESBR),研究ZLIR用量对ESBR性能的影响,并分别与进口液体异戊二烯橡胶(进口LIR)和芳烃油进行对比。结果表明:ZLIR和进口LIR对ESBR胶料的增塑效果优于芳烃油,其能显著改善ESBR的流动性能,降低胶料的加工能耗,在硫化过程中能参与硫化,是一种反应性增塑剂;与芳烃油相比,ZLIR和进口LIR增塑ESBR硫化胶的300%定伸应力(用量为7,10和15份)和0℃下的tanδ较大,压缩疲劳温升、Payne效应、60℃下的tanδ和阿克隆磨耗量较小。ZLIR与进口LIR对ESBR胶料综合性能的影响基本相近。 相似文献
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研究液体聚异戊二烯橡胶(LIR-50)用量对未填充和填充填料的天然橡胶(NR)/反式聚异戊二烯橡胶(TPI)(并用比85/15)并用胶硫化特性、结晶性、物理性能和动态力学性能的影响。结果表明:NR/TPI并用胶的t10和t90随着LIR-50用量的增大而延长,且加工流动性变好;在NR/TPI并用胶中TPI的结晶受到抑制,LIR-50用量对NR/TPI并用胶的结晶性影响不大;随着LIR-50用量的增大,NR/TPI并用胶的邵尔A型硬度、300%定伸应力、拉伸强度及储能模量减小;加入3份LIR-50的并用胶的撕裂强度最大、综合物理性能较好;LIR-50加入对NR/TPI并用胶的耐磨性能、抗湿滑性能以及滚动阻力基本无影响。 相似文献
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考察了3种微观结构相近、不同相对分子质量的液体聚异戊二烯(LIR)及其用量对乳聚丁苯橡胶(ESBR)硫化特性、加工流动性、物理机械性能及动态力学性能的影响,并表征了ESBR硫化胶的微观形貌。结果表明,3种LIR对ESBR混炼胶硫化特性的影响不明显,LIR的相对分子质量越小或用量越多,增塑效果越明显,加工流动性越好;3种LIR均可参与硫化,所增塑ESBR硫化胶的拉伸强度和扯断伸长率均高于未增塑ESBR硫化胶,且相对分子质量越大,其增塑ESBR硫化胶的物理机械性能越优;随着LIR用量的增加,ESBR硫化胶的耐磨性能下降;3种LIR对ESBR硫化胶的撕裂强度、压缩疲劳生热和耐老化性能影响不大;随着LIR用量的增加,LIR增塑ESBR硫化胶的Payne效应越小,损耗变化不大,3种LIR对ESBR硫化胶的抗湿滑性和滚动阻力基本无影响。综合考虑,LIR的用量宜为5份;未增塑ESBR硫化胶中炭黑粒子团聚现象显著,LIR增塑ESBR硫化胶中炭黑粒子呈珠链状分布,分散更均匀。 相似文献
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研究在溶聚丁苯橡胶(SSBR)和白炭黑配方体系中,橡胶操作油(简称操作油)用量对胶料性能的影响。结果表明:随着操作油用量的增大,胶料的门尼粘度、FL和Fmax减小,t5和t90延长;硫化胶的邵尔A型硬度、定伸应力和拉伸强度减小,拉断伸长率、撕裂强度和回弹值增大,耐磨性能和抗切割性能下降,弹性模量和粘性模量减小,0和70 ℃时的损耗因子变化不大,玻璃化温度(Tg)降低。SSBR胶料的门尼粘度、焦烧时间和转矩以及硫化胶的邵尔A型硬度、定伸应力、拉断伸长率、回弹值和Tg均与操作油用量之间具有高度线性相关性。 相似文献
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液体聚异戊二烯对天然橡胶/聚丁二烯橡胶硫化胶微观结构和性能的影响 总被引:1,自引:0,他引:1
研究了液体聚异戊二烯(LIR)作为增塑剂对天然橡胶(NR)/聚丁二烯橡胶(BR)硫化胶微观结构、弯曲疲劳性能、压缩疲劳性能和动态力学性能的影响,并与加入工业用增塑剂芳烃油的硫化胶进行了对比。结果表明,加入LIR较芳烃油有利于炭黑在NR/BR体系中的分散;随着LIR用量的增加,NR/BR硫化胶的耐屈挠疲劳性能基本不变;与芳烃油增塑的NR/BR体系相比,LIR增塑NR/BR体系的耐屈挠疲劳性能较优,压缩疲劳生热和压缩永久变形较低;加入LIR降低了硫化胶滚动阻力的同时减弱了其抗湿滑性。 相似文献
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The effect of liquid isoprene rubber (LIR) on the dynamic mechanical properties of emulsion‐polymerized styrene/butadiene rubber (ESBR) vulcanizates was investigated by temperature sweep using dynamic mechanical analysis. The introduction of LIR led to ESBR vulcanizates having higher loss factor (tan δ) in the temperature range ? 30 to 0 °C, and lower tan δ in the range 60 to 80 °C. A small amount of LIR‐403 (LIR with carboxyl groups) led to a significant change in tan δ: the addition of LIR‐403 (3 phr) led to a 7.5% increase in tan δ from ? 30 to 0 °C, and a 24.9% decrease in tan δ from 60 to 80 °C. It was found that the introduction of LIR increased the bound rubber content in the ESBR compound. Equilibrium swelling experiments showed that the crosslink density of the vulcanizates increased after the introduction of LIR‐403 or LIR‐50 (general purpose LIR). The change in tan δ from 60 to 80 °C was related to polymer–filler interactions. The characteristic constant of filler–ESBR matrix interaction (m) was calculated. At a given filler volume fraction, the increase in m in the presence of LIR could be well related to the decrease in tan δ from 60 to 80 °C. The influence of LIR on filler network in the ESBR compound was also investigated by strain and temperature sweeps using a rubber processing analyzer. Copyright © 2011 Society of Chemical Industry 相似文献
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在胎面配方中使用溶聚丁苯橡胶2466 (SSBR2466)。物理机械性能测试结果表明,使用SSBR2466的胶料拉伸强度增加,填料分散性(M300/M100)增强;动态力学性能测试结果显示,SSBR2466试验胶的0℃tanδ可提高27.5%,60℃tanδ可降低22.8%;试制成品胎滚动阻力可降低2.50%,抗湿滑指数提高2.19%。 相似文献
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Hai Hong Le Katrin Reincke Amit Das Klaus‐Werner Stöckelhuber Swen Wiessner Tung Pham Quang Khang Do Xuan Tung Hoang Wolfgang Grellmann Gert Heinrich Hans‐Joachim Radusch 《大分子材料与工程》2016,301(4):414-422
The selective wetting behavior of silica in emulsion styrene butadiene rubber (ESBR)/solution styrene butadiene rubber (SSBR) blends is characterized by the wetting concept, which is further developed for filled blends based on miscible rubbers. It is found that not only the chemical rubber–filler affinity but also the topology of the filler surface significantly influences the selective filler wetting in rubber blends. The nanopore structure of the silica surface has been recognized as the main reason for the difference in the wetting behavior of the branched ESBR molecules and linear SSBR molecules. However, the effect of nanopore structure becomes more significant in the presence of silane. It is discussed that the adsorption of silane on silica surface constricts the nanopore to some extent that hinders effectively the space filling of the nanopores by the branched ESBR molecules but not by the linear SSBR molecules. As a result, in silanized ESBR/SSBR blends the dominant wetting of silica surface by the tightly bonded layer of SSBR molecules causes a low‐energy dissipation in the rubber–filler interphase. That imparts the low rolling resistance to the blends similar to that of a silica‐filled SSBR compound, while the ESBR‐rich matrix warrants the good tensile behavior, i.e., good abrasion and wear resistance of the blends.
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以多官能团有机锂为引发体系,一步聚合制备了偶联度为100%的锡偶联型溶聚丁苯橡胶(S100)。将其与NR共混,研究了共混物混炼胶的加工性能和硫化胶的物理机械性能。结果表明,NR的加入有利于S100加工性能的改善和混炼效果的提高,并且在NR用量不少于60份(质量,下同)时,可以提高制品的尺寸稳定性;S100并用NR后,硫化胶的300%定伸应力、拉伸强度、撕裂强度、扯断伸长率和永久变形有所提高,但试样动态生热增加,内耗增大,耐磨性降低。兼顾试样的加工性能,NR用量以20~50份为宜。 相似文献
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传统的镍系顺丁橡胶BR9000和四种稀土顺丁橡胶以低并用比(25phr)与SSBR并用时,BR9000与SSBR并用的硫化胶性能与稀土顺丁橡胶并无明显差距,有些性能还要比一些稀土顺丁橡胶更加优良。稀土顺丁橡胶CB24在物理机械性能方面表现出较好的综合性能。具有长链支化结构的稀土顺丁橡胶Nd24EZ具有最高的直角撕裂强度和最低的裂纹扩展速率。具有长链支化结构和高门尼粘度的稀土顺丁橡胶Nd22EZ则具有最佳的滚动阻力和抗湿滑性能。CB24虽然在抗湿滑性能方面表现优良,但其滚动阻力性能在五种顺丁橡胶中是最差的。Nd22EZ与Nd24EZ与白炭黑的相互作用力最强,白炭黑分散最好,表现出最低的佩恩效应。CB24和SKD-NDII则与白炭黑相互作用力较弱,白炭黑分散较差,佩恩效应最强。 相似文献
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