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首页> 外文期刊>Journal of Applied Polymer Science >Improvement of the homogeneity of SBR/NBR blends using polyglycidylmethacrylate-g-butadiene rubber
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Improvement of the homogeneity of SBR/NBR blends using polyglycidylmethacrylate-g-butadiene rubber

机译：使用聚甲基丙烯酸缩水甘油酯-g-丁二烯橡胶改善SBR / NBR共混物的均质性

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摘要

Polyglycidylmethacrylate grafted butadiene rubber (PGN4A-g-BR) was synthesized by a graft Solution copolymerization technique. The PGMA content was determined through titration against HBr. The PGMA-g-BR was blended with styrene butadiene rubber/butadiene acrylonitrile rubber (SBR/NBR) blends with different blend ratios. The SBR/NBR (50/50) blend was selected to examine the compatibility of such blends. Compatibility was examined using scanning electron microscopy (SEM), differential scanning calorimetry (DSC), and viscosity measurements. The scanning electron micrographs illustrate the change of morphology of the SBR/NBR rubber blend as a result of the incorporation of PGMA-g-BR onto that blend. The T(g)s of SBR and NBR in the blend get closer upon incorporation of PGMA-g-BR 10 phr, which indicates improvement in blend homogeneity. The intrinsic viscosity (77) versus blend ratio graph shows a straight-line relationship, indicating some degree of compatibility. Thermal stability of the compatibilized and uncompatibilized rubber blend vulcanizates was investigated by determination of the physicomechanical properties before and after accelerated thermal aging. Of all the vulcanizates with different blend ratios under investigation, the SBR/NBR (25/75) compatibilized blend possessed the best thermal stability. However, the SBR/NBR (75/25) compatibilized blend possessed the best swelling performance in brake fluid. The effect of various combinations of inorganic fillers on the physicomechanical properties of that blend, before and after accelerated thermal aging, was studied in the presence and absence of PGMA-g-BR. (c) 2005 Wiley Periodicals, Inc.
机译：通过接枝溶液共聚技术合成了聚甲基丙烯酸缩水甘油酯接枝的丁二烯橡胶（PGN4A-g-BR）。 PGMA含量通过针对HBr的滴定确定。 PGMA-g-BR与苯乙烯丁二烯橡胶/丁二烯丙烯腈橡胶（SBR / NBR）的共混比不同。选择SBR / NBR（50/50）共混物以检查此类共混物的相容性。使用扫描电子显微镜（SEM），差示扫描量热法（DSC）和粘度测量检查相容性。扫描电子显微照片说明了由于PGMA-g-BR掺入到该共混物中而导致的SBR / NBR橡胶共混物形态的变化。掺入PGMA-g-BR 10 phr后，共混物中SBR和NBR的T（g）变得更接近，这表明共混物均质性得到改善。特性粘度（77）与共混比的关系图呈直线关系，表示一定程度的相容性。通过测定加速热老化前后的物理力学性能，研究了相容和不相容的橡胶共混物硫化物的热稳定性。在所有具有不同混合比例的硫化橡胶中，SBR / NBR（25/75）相容的混合物具有最佳的热稳定性。但是，SBR / NBR（75/25）相容的混合物在制动液中具有最佳的溶胀性能。在存在和不存在PGMA-g-BR的情况下，研究了无机填料的各种组合对共混物物理力学性能的影响（在加速热老化之前和之后）。 （c）2005年Wiley Periodicals，Inc.

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