ABSTRACT

This work aims to investigate the effect of chitosan powders on the mechanical, morphological and thermal behaviour of nitrile rubber (NBR). The chitosan content has been varied between 0 and 15 phr. NBR was initially loaded with chitosan using a two-roll mixing mill along with compounding agents and then cured by compression moulding using accelerated sulphur vulcanisation strategy. The results indicate that the mechanical properties of NBR increase at a critical loading of chitosan (12 phr). A new Chitosan Efficacy Index has been proposed to understand the effect of chitosan loading on overall mechanical properties. Morphological examinations by using scanning electron microscopy pointed towards the presence of voids and discontinuities within the fractured surfaces of the composites. Thermogravimetric analysis and water absorption studies have also been carried out to complement the results from the investigation of mechanical properties.

摘要

本工作旨在研究壳聚糖粉末对丁腈橡胶 (NBR) 的机械、形态和热行为的影响。壳聚糖含量在 0 到 15 份之间变化。NBR 最初使用双辊混炼机与配合剂一起装载壳聚糖，然后使用加速硫磺硫化策略通过压缩成型固化。结果表明，NBR 的机械性能在壳聚糖的临界负载量（12 份）下增加。已经提出了一个新的壳聚糖功效指数来了解壳聚糖负载对整体机械性能的影响。使用扫描电子显微镜进行的形态学检查表明复合材料的断裂表面内存在空隙和不连续性。