共查询到17条相似文献,搜索用时 73 毫秒
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ECO/NBR共混橡胶的共硫化性能 总被引:3,自引:0,他引:3
研究了二元共聚氯醚橡胶(ECO)与丙烯腈质量分数为41%的丁腈橡胶(NBR)的共硫化性以及共硫化剂用量对ECO/NBR物理机械性能,耐老化性能,耐油性能的影响。结果表明,促进剂TT可以作为ECO/NBR的共硫化剂。当ECO采用NA-22/TT/Pb3O4/MgO并用硫化体系,NBR采用DCP/TAIC/TT/MgO,且促进剂TT用量为1.5份时,ECO/NBR共混胶的物理机械性能,耐老化性能及耐油性能达到最佳平衡。 相似文献
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NBR/EPVC共混物的性能研究 总被引:1,自引:0,他引:1
研究NBR/聚氯乙烯糊树脂(EPVC)常温共混物的物理性能及耐热老化性能,并与NBR/硬质聚氯乙烯(SPVC)高温共混物进行对比,结果表明,加入EPVC可提高NBR的耐热老化性能;与NBR/SPVC高温共混物相比,NBR/EPVc常温共混物的300%定伸应力、拉伸强度和撕裂强度增大,耐热老化性能提高,耐臭氧老化性能相当,且共混工艺简单,可节约能源和降低混炼成本。 相似文献
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研究了对叔丁基酚醛树脂用量对NR/NBR/环氧化天然橡胶(ENR)共混物动态力学性能的影响。加对叔丁基酚醛树酯的NR/NBR/ENR共混物有2个动态力学损耗峰(分别对应共混物的玻璃化转变温度Tg1和Tg2)。随着对叔丁基酚醛树脂用量(0-15份)增大,共混物的Tg1基本不变,Tg2则逐渐升高;温度为Tg1的共混物损耗因子(tanδ)峰值化不大,温度为Tg2的共混物tanδ峰值则逐渐增大。通过调节对叔丁基酚醛树脂用量可以改变共混物在0和65℃附近的tanδ值,从而获得抗湿滑性能好、滚动损失小的新型胎面材料。 相似文献
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Ibnelwaleed A. Hussein Rehan A. Chaudhry Basel F. Abu Sharkh 《Polymer Engineering and Science》2004,44(12):2346-2352
In this study, hydrogenated acrylonitrile butadiene rubber (HNBR, ZETPOL‐2010L) and nitrile butadiene rubber (NBR, NIPOL‐DN4555) were blended at different ratios in a Haake melt blender at 130°C. The HNBR and the NBR were of very similar acrylonitrile content and Mooney viscosity. The melt miscibility and solid‐state properties were investigated by rheological, thermal, and mechanical testing and scanning electron microscopy (SEM) techniques. The dynamic viscosity of the blends followed the log‐additivity rule, while the flow activation energy closely followed the inverse additivity rule. On the other hand, the storage modulus showed synergistic effects at all compositions, suggesting the presence of emulsion morphology at both ends of the composition range. For the 50/50 HNBR/NBR blend, the SEM micrographs suggest a uniform elongated structure. The thermal analysis showed the presence of two glass transitions, representing the pure components, at all blend ratios, suggesting the absence of segmental miscibility of the blends. The small‐strain mechanical properties such as tensile modulus and yield stress followed linear additivity. However, HNBR and HNBR‐rich blends were observed to strain harden at a rate higher than that of NBR. Induced crystallization of HNBR was suggested to be the reason for the strain hardening. The different rheological, thermal, and mechanical testing techniques agree in suggesting that the structurally similar HNBR and NBR are not thermodynamically miscible but mechanically compatible. Polym. Eng. Sci. 44:2346–2352, 2004. © 2004 Society of Plastics Engineers. 相似文献
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NBR/PVC共混物的共混工艺和性能 总被引:1,自引:0,他引:1
介绍NBR/PVC共混物的共混工艺和性能。NBR/PVC共混物共混工艺主要有乳液共沉法和机械共混法,其中乳液共沉法共混物性能较好,机械共混法操作简单、成本较低。影响共混物性能的因素主要有NBR的门尼粘度和丙烯腈含量、PVC品种、NBR/PVC共混比、共混温度以及PVC在共混物中的分散程度等。 相似文献
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丁腈橡胶(NBR)与聚氯乙烯(PVC)共混合金是橡塑共混体系中一类重要的共混体系,NBR和PVC都属于极性聚合物,在共混过程中,相容性较好,因此这种体系被广为研究和应用。但此方法是选用粉末丁腈胶直接加入PVC中进行混炼共混,仍然存在共混不均匀的问题。本实验用乳液共混凝聚法制备了NBR/PVC共沉胶,研究了共沉工艺条件、丁腈胶种类与性能对NBR/PVC合金性能影响。 相似文献