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首页> 外文期刊>Journal of Applied Polymer Science >Surface migration of carboxylic acid in styrene-butadiene rubber and its tribological consequences
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Surface migration of carboxylic acid in styrene-butadiene rubber and its tribological consequences

机译：羧酸在丁苯橡胶中的表面迁移及其摩擦学后果

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摘要

Surface migration of the carboxylic acids (C10H21COOH, C11H23COOH, C12H25COOH, C15H31COOH, C16H33COOH, and C17H35COOH) in styrene-butadiene rubber (SBR) matrix was investigated together with its influence on tribological properties of the vulcanisates. Macro- and microtribological properties were correlated with properties that come from carboxylic acid addition to the samples. A plastifying effect was characterized by a decrease of the rubber glass transition temperature measured by the DSC method. Thickness of an acid bloom was directly determined from an indentation experiment and estimated from the DSC curve as well as from FTIR reflection spectra. Morphology of the bloom was studied using an AFM technique to characterize topography as well as microroughness of the bloom surface. Macrofriction was studied using block-on-ring tribometer. Microfriction was examined with a Nano Test apparatus, applying ball-on-plate contact. Despite correlation found between plastification, morphology, and bloom thickness on the one hand, and tribologic properties of the rubber on the other hand, influence of the chain length of carboxylic acids on properties of the samples still needs further qualitative investigation. Tribological properties of SBR modified with carboxylic acids are the result of balance of two opposite effects: plastification of rubber-leading to an increase of friction and lubrication-which causes a decrease of friction of the rubber. Apart from plastifying and lubrication effects microroughness also plays an important role in friction. (C) 2002 Wiley Periodicals, Inc. [References: 21]
机译：研究了羧酸（C10H21COOH，C11H23COOH，C12H25COOH，C15H31COOH，C16H33COOH和C17H35COOH）在丁苯橡胶（SBR）基质中的表面迁移及其对硫化橡胶的摩擦学性能的影响。宏观和微观摩擦学特性与将羧酸添加到样品中的特性相关。增塑效果的特征在于通过DSC方法测得的橡胶玻璃转变温度的降低。通过压痕实验直接确定酸霜的厚度，并根据DSC曲线和FTIR反射光谱进行估算。使用AFM技术研究了水华的形貌，以表征水华表面的形貌和微观粗糙度。使用环上摩擦计对宏观摩擦进行了研究。用纳米测试装置，通过板对球接触，检查微摩擦。尽管一方面在增塑，形态和起霜厚度之间存在相关性，另一方面在橡胶的摩擦学性质方面存在相关性，但是羧酸链长对样品性能的影响仍然需要进一步的定性研究。羧酸改性的SBR的摩擦学性能是两个相反作用的平衡的结果：橡胶的塑化导致摩擦和润滑的增加，这导致橡胶的摩擦减少。除增塑和润滑作用外，微粗糙度在摩擦中也起重要作用。 （C）2002 Wiley Periodicals，Inc. [参考：21]

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