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Effect of pre‐mastication on dispersion of nanoclay in presence of carbon black in an inner liner compound: Studies on physicomechanical and functional properties
Polymer Engineering and Science ( IF 3.2 ) Pub Date : 2021-01-10 , DOI: 10.1002/pen.25639 Koushik Banerjee 1 , Jagannath Chanda 1 , Soumya Ghosh Chowdhury 1 , Koushik Pal 1 , Rabindra Mukhopadhyay 1 , Sanjay Kumar Bhattacharyya 1 , Abhijit Bandyopadhyay 2
Polymer Engineering and Science ( IF 3.2 ) Pub Date : 2021-01-10 , DOI: 10.1002/pen.25639 Koushik Banerjee 1 , Jagannath Chanda 1 , Soumya Ghosh Chowdhury 1 , Koushik Pal 1 , Rabindra Mukhopadhyay 1 , Sanjay Kumar Bhattacharyya 1 , Abhijit Bandyopadhyay 2
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The present study demonstrates the use of “pre‐mastication” technique for getting higher dispersion of organoclay, Cloisite 15A, in an inner liner compound based on 70:30 bromobutyl and natural rubber blend, in presence of higher concentration of carbon black (60 phr) for the improvement of functional properties like fatigue cut growth and air permeability resistance. Studies have showed that the organoclay was almost equally distributed within the blend both in absence as well as in presence of carbon black. The vulcanization curve showed a marked increase in cure acceleration as well as a significant rise in the maximum torque value because of higher crosslinking aided by the participation of the quaternary amine present in Cloisite 15A; however, in the carbon black loaded compound, the cure acceleration was not so pronounced because of engaging interaction between amine and functional groups of carbon black. The microscopic study revealed a good dispersion of Cloisite 15A within the elastomer blend‐ in presence of carbon black. The anisotropic platelets of Cloisite 15A and carbon black particles jointly formed “nano units”, which occluded a portion of elastomer segments vis‐a‐vis partial intercalation within the clay gallery. Such a reinforcing model was instrumental in improving the physicomechanical and functional properties under static and dynamic conditions. The organoclay displayed a much‐improved properties at 2 and 4 phr doses in presence of 60 phr carbon black because of formation of enough “nano units” while deterioration was observed at 6 phr dose due to clay aggregation. Based on the results obtained on functional properties it was concluded that the 4 phr of organoclay compounded in “pre‐mastication” mode delivered the best improvement and thus it was recommended for future up‐scaling study.
中文翻译：
在炭黑存在下，内衬复合物中预乳化对纳米粘土分散的影响：物理力学和功能性质的研究
本研究表明，在较高浓度的炭黑（60 phr）存在的情况下，使用“预乳化”技术可在基于70:30溴化丁基橡胶和天然橡胶混合物的内衬胶料中获得更高的有机粘土Cloisite 15A分散性。 ）以改善功能特性（例如疲劳剪切增长和耐透气性）。研究表明，在不存在和存在炭黑的情况下，有机粘土几乎均匀地分布在共混物中。硫化曲线显示出固化促进作用的显着提高以及最大扭矩值的显着提高，这是由于Cloisite 15A中存在的季胺的参与促进了更高的交联度。但是，在炭黑负载的化合物中，由于胺和炭黑官能团之间的相互作用，固化促进作用并不那么明显。微观研究表明，在炭黑的存在下，Cloisite 15A在弹性体共混物中有良好的分散性。Cloisite 15A和碳黑颗粒的各向异性片层共同形成了“纳米单元”，相对于部分粘土在粘土廊道中的嵌入而言，它封闭了一部分弹性体片段。这种增强模型有助于改善静态和动态条件下的物理机械和功能特性。由于形成了足够的“纳米单元”，在60 phr的炭黑中，有机粘土在2 phr和4 phr剂量下显示出大大改善的性能，而在6 phr剂量下由于粘土聚集而观察到了劣化。
更新日期：2021-03-07
中文翻译：
在炭黑存在下，内衬复合物中预乳化对纳米粘土分散的影响：物理力学和功能性质的研究
本研究表明，在较高浓度的炭黑（60 phr）存在的情况下，使用“预乳化”技术可在基于70:30溴化丁基橡胶和天然橡胶混合物的内衬胶料中获得更高的有机粘土Cloisite 15A分散性。 ）以改善功能特性（例如疲劳剪切增长和耐透气性）。研究表明，在不存在和存在炭黑的情况下，有机粘土几乎均匀地分布在共混物中。硫化曲线显示出固化促进作用的显着提高以及最大扭矩值的显着提高，这是由于Cloisite 15A中存在的季胺的参与促进了更高的交联度。但是，在炭黑负载的化合物中，由于胺和炭黑官能团之间的相互作用，固化促进作用并不那么明显。微观研究表明，在炭黑的存在下，Cloisite 15A在弹性体共混物中有良好的分散性。Cloisite 15A和碳黑颗粒的各向异性片层共同形成了“纳米单元”，相对于部分粘土在粘土廊道中的嵌入而言，它封闭了一部分弹性体片段。这种增强模型有助于改善静态和动态条件下的物理机械和功能特性。由于形成了足够的“纳米单元”，在60 phr的炭黑中，有机粘土在2 phr和4 phr剂量下显示出大大改善的性能，而在6 phr剂量下由于粘土聚集而观察到了劣化。
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