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首页> 外文期刊>Journal of Applied Polymer Science >Dispersion and vulcanization characteristics of nitrile rubber reinforced with N,N-dimethylacetamide/lithium chloride treated silica
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Dispersion and vulcanization characteristics of nitrile rubber reinforced with N,N-dimethylacetamide/lithium chloride treated silica

机译：用N，N-二甲基乙酰胺/氯化锂处理二氧化硅增强丁腈橡胶的分散和硫化特性

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摘要

N,N-Dimethylacetamide/lithium chloride (DMAc/LiCl) treated silica is used as a reinforcing filler in nitrile rubber (NBR). Effect of the treatment on aggregate morphology and dispersion of silica in the matrix is investigated using XPS, SEM, and AFM. Binding energy levels of O1s and Si2p electrons in DMAc/LiCl treated silica have shifted significantly from 532.49 to 530.98 eV and 103.19 to 101.33 eV respectively. SEM observations have revealed a reduction in the agglomerate size of silica-a desirable feature for realizing better processing properties of silica filled rubber compounds. Data from AFM observations have also shown better dispersion of DMAc/LiCl treated silica. Mooney viscosity of masterbatches, measured at 100 degrees C over a period of 7 days, has not exhibited any storage hardening which is an indication of easier processability. At 125 degrees C, Mooney data exhibited a reduction in scorch time as a function of DMAc/LiCl concentration. However, MDR data at 160 degrees C have not shown much changes in the scorch time while NBR with high nitrile content exhibited longer cure times. Higher crosslink density of vulcanizates indicate that DMAc/LiCl treatment of silica could effectively reduce filler-filler interactions and networking in silica filled rubber compounds thereby enabling mixing and processing operations energy efficient.
机译：N、 N-二甲基乙酰胺/氯化锂（DMAc/LiCl）处理过的二氧化硅用作丁腈橡胶（NBR）中的补强填料。利用XPS、SEM和AFM研究了处理对骨料形态和二氧化硅在基体中分散的影响。在DMAc/LiCl处理的二氧化硅中，O1s和Si2p电子的结合能水平分别从532.49到530.98 eV和103.19到101.33 eV显著移动。SEM观察表明，二氧化硅的团聚尺寸减小，这是实现二氧化硅填充橡胶化合物更好加工性能的理想特征。AFM观测数据也表明，DMAc/LiCl处理的二氧化硅分散性更好。母粒的门尼粘度在100摄氏度下测量7天，没有显示出任何储存硬化，这表明母粒易于加工。在125℃时，穆尼数据显示，焦烧时间随着DMAc/LiCl浓度的增加而减少。然而，160℃下的MDR数据没有显示出焦烧时间有多大变化，而高腈含量的NBR则显示出更长的固化时间。硫化胶的更高交联密度表明，对二氧化硅进行DMAc/LiCl处理可以有效地减少填充二氧化硅的橡胶化合物中的填料-填料相互作用和网络，从而使混合和加工操作节能。

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