未填充丁腈橡胶的硫化胶在机械“塑化”过程中形态的演变*

I. Baranets, S. K. Kurlyand, E. S. Suzdal’tseva
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引用次数: 0

摘要

使用光学显微镜研究了丁腈橡胶未填充硫化胶在薄轧机辊间隙和随后的热处理-再硫化过程中机械降解过程中形态转变的特征,而不向降解物中添加任何成分。使用了以徕卡DM-2500光学显微镜、徕卡DFC-420C高分辨率数码彩色相机和专用电脑桌为基础的分析综合体。研究了0 ~ 40 min磨矿时间对塑化试样形貌参数和微观结构性质的影响。分析了硫化胶在塑化过程中的降解和结构形成机理。在“二次”硫化胶中发现了额外三维骨架的形成,并且随着降解处理时间的增加,这一过程的积累可能会导致机械性能的增加,超过初始硫化胶的水平。然而,成分不均匀性的增加可能会对耐油性产生不利影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The evolution of morphology during the mechanical ‘plasticisation’ of unfilled vulcanisates of nitrile rubbers*
Optical microscopy was used to investigate features of morphological transformation during the mechanical degradation of unfilled vulcanisates of nitrile butadiene rubbers in a thin mill roll gap and subsequent thermal treatment – revulcanisation without the addition of any components into the degradate. An analytical complex based on a Leica DM-2500 optical microscope, a Leica DFC-420C high-resolution digital colour camera, and a specialised computer desk was used. The influence of the milling time in the 0–40 min range on the morphological parameters and the nature of the fine structure of plasticised specimens was studied. The mechanisms of degradation and structure formation during the plasticisation of vulcanisates were analysed. The formation of an additional three-dimensional skeleton in ‘secondary’ vulcanisates and the build-up of this process with increase in the treatment time of the degradate were found, which may lead to an increase in the mechanical properties to a level exceeding that of the initial vulcanisate. However, increase in compositional inhomogeneity may have an adverse effect on oil resistance.
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