This work aims to present an alternative green plasticizer for natural rubber (NR) compounds to avoid using petroleum-based plasticizer, which causes air pollution and impacts human health. The application of Moringa oil (MO) as a bioplasticizer was studied in both gum and carbon black (CB) reinforced NR compounds for a better understanding of the plasticization mechanism and the effect of MO on the properties of NR and NR/CB vulcanizates compared with the traditional plasticizer naphthenic oil (NO). Results indicated that the addition of MO into NR and NR/CB compounds improved cure rate index (CRI), mechanical properties, and rolling resistance compared with NO plasticized compounds. The glass transition temperature (T_g) of both gum and CB filled NR vulcanizates was affected noticeably by the presence of MO. In addition, there was no significant difference between using MO and NO on the cross-link density of the vulcanizates, nor dispersion of CB in the NR/CB vulcanizates. The plasticization mechanisms of MO and NO in the NR compounds were proposed and discussed. As a result, the present study suggests that MO could be used as an alternative nontoxic plasticizer for NR and NR/CB compounds while simultaneously enhancing the static and dynamic properties of the NRs.

中文翻译：

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辣木油作为有效生物增塑剂对天然橡胶硫化胶静态和动态机械性能的影响

这项工作旨在为天然橡胶（NR）化合物提供一种替代绿色增塑剂，以避免使用石油基增塑剂，避免使用石油基增塑剂造成空气污染并影响人类健康。研究了辣木油 (MO) 作为生物增塑剂在生胶和炭黑 (CB) 增强 NR 胶料中的应用，以便更好地了解增塑机理以及 MO 对 NR 和 NR/CB 硫化胶性能的影响（与传统橡胶相比）。传统增塑剂环烷油（NO）。结果表明，与 NO 塑化胶料相比，在 NR 和 NR/CB 胶料中添加 MO 可以提高固化速率指数 (CRI)、机械性能和滚动阻力。MO 的存在显着影响生胶和炭黑填充 NR 硫化橡胶的玻璃化转变温度 ( T _g )。此外，使用MO和NO对硫化胶的交联密度以及CB在NR/CB硫化胶中的分散性没有显着差异。提出并讨论了 MO 和 NO 在 NR 化合物中的塑化机理。因此，本研究表明 MO 可以用作 NR 和 NR/CB 化合物的替代无毒增塑剂，同时增强 NR 的静态和动态性能。