Naturally occurring halloysite nanotubes for enhanced durability of natural rubber/ethylene propylene diene monomer rubber vulcanizate,Journal of Vinyl and Additive Technology

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Naturally occurring halloysite nanotubes for enhanced durability of natural rubber/ethylene propylene diene monomer rubber vulcanizate
Journal of Vinyl and Additive Technology ( IF 3.8 ) Pub Date : 2021-08-12 , DOI: 10.1002/vnl.21856
Saman Ghaderzadeh ₁ , Elnaz Esmizadeh ₂ , Ali Vahidifar ₃ , Ghasem Naderi ₁ , Mir Hamid Reza Ghoreishy ₁ , Tizazu H. Mekonnen ₄

Affiliation

A facile approach of using halloysite nanotubes (HNTs) was proposed to address the durability performance demands of natural rubber (NR)/ethylene propylene diene monomer rubber (EPDM) blends and to protect them from the deleterious effects of the service environment including ozone, chemicals, abrasion, and cyclic loading. The introduction of HNTs substantially improved the stability of NR/EPDM when exposed to ozone (over fourfold enhancement with the addition of 5â€‰phr HNTs). Moreover, the HNT-filled NR/EPDM vulcanizates offered approximately 66% reduction in the solvent-mediated swelling in comparison to the unfilled sample. Fatigue life studies showed that the HNT-reinforced NR/EPDM composite could withstand 30% more cycles to failure than the un-reinforced NR/EPDM blend. The effect of various HNT loading on the morphological, mechanical, physical, and rheological properties of nanocomposite vulcanizates based on NR/EPDM was also investigated. The morphological investigations revealed that the introduction of HNT into the NR/EPDM rubber matrix caused a rough morphology in fracture surface and a well-dispersed structure was obtained with the addition of up to 5 phr of HNTs. These findings were further supported by rheological, mechanical, and thermodynamical results.

中文翻译：

天然埃洛石纳米管可提高天然橡胶/乙烯丙烯二烯单体橡胶硫化物的耐久性

提出了一种使用埃洛石纳米管 (HNT) 的简便方法来满足天然橡胶 (NR)/三元乙丙橡胶 (EPDM) 共混物的耐久性性能要求，并保护它们免受使用环境的有害影响，包括臭氧、化学品、磨损和循环载荷。当暴露于臭氧时，HNTs 的引入大大提高了 NR/EPDM 的稳定性（增加了 5phr HNTs 的四倍增强）。此外，与未填充的样品相比，填充 HNT 的 NR/EPDM 硫化胶使溶剂介导的溶胀降低了约 66%。疲劳寿命研究表明，与未增强的 NR/EPDM 共混物相比，HNT 增强的 NR/EPDM 复合材料可承受多 30% 的失效循环。不同 HNT 负载对形态、力学、还研究了基于 NR/EPDM 的纳米复合硫化胶的物理和流变特性。形态学研究表明，将 HNT 引入 NR/EPDM 橡胶基质中会导致断裂表面出现粗糙的形态，并且通过添加高达 5 份的 HNT 获得了良好分散的结构。这些发现得到了流变学、机械和热力学结果的进一步支持。

更新日期：2021-08-12

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