Master curve of filler localization in rubber blends at an equilibrium state

Master curve of filler localization in rubber blends at an equilibrium state
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平衡状态下橡胶共混物中填料定位的主曲线

DOI:
10.1007/s10853-012-6277-6
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发表时间:
2012
影响因子:
4.5
通讯作者:
Radusch H-J
Radusch H-J
中科院分区:
材料科学3区
文献类型:
--
作者:
Oßwald K;Ilisch S;Hoang XT;Heinrich G;Radusch H-J

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采用选择性萃取法和润湿概念,研究了填料在NBR/NR共混物中的相特异性定位。提出了一个基于热力学数据的模型,用于定量预测橡胶共混物中填料的局部化。填料定位可以通过主曲线来描述,该主曲线展示了依赖于共混组分和填料的填料表面张力数据的特征行为。通过考虑二氧化硅表面上的硅烷醇基团被吸附的固化添加剂的失活,该模型充分解释了填料负载对二氧化硅局部化的影响。利用主曲线,可以估算固化助剂和硅烷添加量对填料表面张力的影响,为评价和比较不同偶联剂的效果提供依据。不同填料的表面张力值估计的主曲线的装置,它们位于相同的顺序相比,文献报道。还可以定量地预测橡胶共混物中填料的潜在转移。
In this study, the phase-specific localization of filler in NBR/NR blends was characterized by means of the selective extraction method and wetting concept. A strong dependence of silica localization on the filler loading was found. A model based on thermodynamic data was proposed for a quantitative prediction of filler localization in rubber blends. The filler localization can be described by a master curve demonstrating a characteristic behavior in dependence on the filler surface tension data of blend components and filler. The effect of filler loading on the silica localization is sufficiently explained by this model by taking into consideration the deactivation of the silanol groups on the silica surface by adsorbed curing additives. Using the master curve, the surface tension of filler affected by curing additives and silane addition can be estimated that may be useful for evaluation and comparison of the effect of different coupling agents. Surface tension values of different fillers were estimated by means of the master curve and they lie in the same order compared to those reported in literature. A potential transfer of filler within a rubber blend can be also quantitatively predicted.
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