共查询到18条相似文献,搜索用时 234 毫秒
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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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以溴化丁基橡胶(BIIR)等量替代天然橡胶(NR)和顺丁橡胶(BR),分别制备NR/BIIR和NR/BR/BIIR并用胶,研究并用胶的物理性能、耐热空气老化性能和动态力学性能的变化。结果表明:与NR胶料和NR/BR并用胶分别相比,NR/BIIR和NR/BR/BIIR并用胶的物理性能略有下降,耐热空气老化性能大幅度提升,抗湿滑性能提高、滚动阻力变化不大;当BIIR用量分别为10和15份时,NR/BIIR和NR/BR/BIIR并用胶的耐热空气老化性能较好。 相似文献
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考察了自制的植物基环保橡胶油(PBRO)对丁苯橡胶(SBR)混炼胶硫化特性及硫化胶物理机械性能、耐热空气老化性能、耐寒性的影响,对比研究了PBRO与石蜡油、环烷油、芳烃油和邻苯二甲酸二辛酯(DOP)对SBR硫化胶性能的影响。结果表明,橡胶油的加入促进了SBR混炼胶的交联,硫化速率加快,且有增塑效果;当橡胶油PBRO的用量为20份时,SBR硫化胶的综合性能较优;当分别添加等量橡胶油时,PBRO和DOP对SBR硫化胶的增塑效果较差,而芳烃油的增塑效果最好,添加PBRO的SBR硫化胶的耐热空气老化性能和热稳定性最好,但物理机械性能和耐寒性能较差,而添加芳烃油的SBR硫化胶的物理机械性能最优,添加石蜡油的SBR硫化胶的耐寒性能最优。 相似文献
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Sung‐Seen Choi 《应用聚合物科学杂志》2000,75(11):1378-1384
Variation of the crosslink density of a rubber vulcanizate depending on the rubber composition after the thermal aging was studied with single rubber, biblend, and triblend vulcanizates of natural rubber (NR), butadiene rubber (BR), and styrene‐butadiene rubber (SBR). The efficient vulcanization (EV) system was employed to minimize the influence of free sulfur in the vulcanizate on the change of the crosslink density. Thermal aging was performed at 40, 60, and 80°C for 20 days with 5‐day intervals. The crosslink densities of the vulcanizates after the thermal aging increase. For the single rubber vulcanizates, variation of the crosslink density by the thermal aging has the order: SBR > BR > NR. For the biblend vulcanizates, variations of the crosslink densities of the NR/SBR and SBR/BR blends are larger than that of NR/BR blend. Variation of the crosslink density of the vulcanizate increases by increasing the SBR content in the vulcanizate. Variation of the crosslink density of the rubber vulcanizate depending on the rubber composition was explained by miscibility of the blends, combination reaction of the pendent groups, and mobility of the pendent group. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 75: 1378–1384, 2000 相似文献
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采用以天然橡胶(NR)、NR/顺丁橡胶(BR)和NR/BR/溶聚丁苯橡胶(SSBR)为基体的轮胎胎面胶配方,研究低滞后炭黑DZ13对3种硫化胶物理性能和疲劳破坏行为的影响。结果表明:低滞后炭黑DZ13部分替代炭黑N234后,NR,NR/BR和NR/BR/SSBR硫化胶的物理性能变化规律相似,即定伸应力略有增大、拉断伸长率和撕裂强度减小;耐磨性能、耐压缩疲劳性能和耐割口增长性能的变化依赖于基体橡胶;其中NR/BR硫化胶的屈挠疲劳次数提高,但疲劳破坏界面的微观形貌更加粗糙。 相似文献
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研究了10种偶联剂和3种表面活性剂改性白炭黑后对NR/BR硫化胶性能的影响.试验结果表明,不同表面改性剂改性白炭黑后对NR/BR硫化胶物理性能的影响程度大小顺序为硅烷类偶联剂>钛酸酯类偶联剂>表面活性剂.其中硅烷类偶联剂的改性效果优劣顺序为KH-550>KH-846>KH-590>KH-560,带胺基和磷酸酯基团的偶联剂具有较好的抗老化作用;钛酸酯类偶联剂的改性效果优劣顺序为NDZ-311w>NDZ-102>NDZ-201>NDZ-311>NDZ-401>NDZ-101;表面活性剂的改性效果优劣顺序为ATAC>T-40>ABS. 相似文献
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《塑料、橡胶和复合材料》2013,42(9):365-372
AbstractBis-(triethoxysilylpropyl)-tetrasulfane functionalised carbon nanotubes (t-CNTs) were used as compatibiliser along with liquid isoprene rubber (LIR) in the natural rubber (NR)/polybutadiene rubber (BR) blend. Their reinforcing and compatibilising effects were evaluated by mechanical, fatigue crack growth resistance properties and blend homogeneity. Scanning electron microscope and transmission electron microscope showed enhanced interfacial adhesion between the binary rubber phases and improved dispersion of the minor phase in the rubber blend respectively with the co-existence of LIR and carbon nanotubes. The tensile strength of the carbon black (CB) filled NR/BR blend reached its optimum when 3 phr CB was replaced with an equal amount of t-CNTs in the presence of 7 phr LIR, while the fatigue crack growth resistance property achieved its maximum in the presence of 3 phr LIR. This interesting co-compatibilisation behaviour of t-CNTs and LIR suggests that t-CNTs have a better effect than CB with the assistance of LIR, which is an effective plasticiser in the NR/BR blend. 相似文献