Progress in Rubber, Plastics and Recycling Technology ( IF 2.6 ) Pub Date : 2019-12-23 , DOI: 10.1177/1477760619895012 Harini Sridharan 1 , Jagannath Chanda 2 , Prasenjit Ghosh 2 , Rabindra Mukhopadhyay 2
Various processing parameters affect the dispersion of carbon black (CB) in a rubber matrix, of which mixing time plays a major role. The physical properties of a green compound namely bound rubber and Mooney viscosity along with mechanical and fatigue crack growth (FCG) are affected by the dispersion of filler particles. To determine the effect of mastication on dispersion, the mixing time was varied from 120 s to 600 s where it was gauged that an optimum range of mixing times display better dispersion. The difference in dispersion between the green and the cured compounds was also stark due to the flocculation mechanism. Longer mixing times do not show much decrease in agglomerate size on curing, that is, approximately 2%, whereas shorter time has led to a decrease of 20%. The FCG properties were studied using a tear and fatigue analyser, where the FCG rate displays a similar trend with the dispersion of CB.
中文翻译:
混合时间对填充炭黑的天然橡胶硫化胶中疲劳裂纹扩展的影响
各种加工参数会影响炭黑(CB)在橡胶基质中的分散,其中混合时间起着主要作用。绿色化合物的物理性能(即粘合的橡胶和门尼粘度)以及机械裂纹和疲劳裂纹增长(FCG)受到填料颗粒分散的影响。为了确定咀嚼对分散的影响,将混合时间从120 s改变为600 s,在该时间中,可以确定最佳混合时间范围显示出更好的分散性。由于絮凝机理,生胶和固化胶之间的分散差异也很明显。较长的混合时间在固化时不会显示出大的团聚体尺寸减小,即大约2%,而较短的时间导致减小了20%。使用撕裂和疲劳分析仪研究了FCG特性,