Filler Wetting in Miscible ESBR/SSBR Blends and Its Effect on Mechanical Properties
Filler Wetting in Miscible ESBR/SSBR Blends and Its Effect on Mechanical Properties
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DOI：
10.1002/mame.201500325
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发表时间：
2016-04
影响因子：
3.9
通讯作者：
H. H. Le-H.;K. Reincke;A. Das;K. Stöckelhuber;Swen Wiessner;T. Pham;Q. Do;X. T. Hoang;W. Grellmann;G. Heinrich;H. Radusch
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文献类型：
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作者：
H. H. Le-H.;K. Reincke;A. Das;K. Stöckelhuber;Swen Wiessner;T. Pham;Q. Do;X. T. Hoang;W. Grellmann;G. Heinrich;H. Radusch
用润湿概念表征了二氧化硅在乳液型丁苯橡胶(ESBR)/溶液型丁苯橡胶（SSBR）共混体系中的选择性润湿行为，并进一步发展了基于混相橡胶的填充共混体系。研究发现，化学橡胶与填料的亲和性以及填料表面的拓扑结构对橡胶共混体系中填料的选择性润湿有显著影响。二氧化硅表面的纳米孔结构被认为是支链ESBR分子与线性SSBR分子润湿行为差异的主要原因。而在硅烷的存在下，纳米孔结构的影响更为显著。讨论了硅烷在二氧化硅表面的吸附在一定程度上收缩了纳米孔，有效地阻碍了支链ESBR分子对纳米孔的填充，而不是线性SSBR分子对纳米孔的填充。因此，在硅化ESBR/SSBR共混体系中，SSBR分子紧密结合层对二氧化硅表面的润湿作用占主导地位，导致了橡胶填料界面的低能量耗散。这使得共混物具有类似于硅填充SSBR化合物的低滚动阻力，而富含esbr的基体保证了共混物的良好拉伸性能，即良好的耐磨性和耐磨性。
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.