Enhancement of aging resistance of EPDM rubber by natural rubber-g-N (4-phenylenediamine) maleimide as a grafted antioxidant,Journal of Vinyl and Additive Technology

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Enhancement of aging resistance of EPDM rubber by natural rubber-g-N (4-phenylenediamine) maleimide as a grafted antioxidant
Journal of Vinyl and Additive Technology ( IF 3.8 ) Pub Date : 2021-10-21 , DOI: 10.1002/vnl.21875
Abd El‐Aziz A. El‐Wakil ₁ , Soma El‐Mogy ₁ , Sawsan F. Halim ₁ , Ahmed Abdel‐Hakim ₁

Affiliation

A new antioxidant was prepared by graft copolymerization of N (4-phenylenediamine) maleimide (pPDAM) onto natural rubber (NR). Fourier transform infrared technique was used to confirm the grafting of (pPDAM) onto the NR backbone. The grafted copolymer (NR-g-pPDAM) was incorporated into the ethylene propylene diene monomer rubber (EPDM) rubber mix as an antioxidant. For comparison purposes, a widely used antioxidant N-(1,3-dimethylbutyl)-N′-phenyl-p-phenylenediamine (6PPD) was used in addition to a blank sample without antioxidant. The rheometric characteristics of EPDM vulcanizates were determined using an oscillating disc rheometer. Different mechanical properties of the EPDM vulcanizates were measured before and after exposure to thermal and ultraviolet/ozone (UV/O₃) accelerated aging. The results revealed that the grafted antioxidant NR-g-pPDAM is more efficient, for EPDM rubber vulcanizates than the commercial antioxidant (6PPD). EPDM containing grafted (NR-g-pPDAM) antioxidant exhibited promising properties, such that it is expected to fulfill major requirements of industrial, automotive, and construction applications.

中文翻译：

天然橡胶-gN(4-苯二胺)马来酰亚胺作为接枝抗氧剂提高三元乙丙橡胶的耐老化性

将N (4-苯二胺)马来酰亚胺( p PDAM)接枝共聚在天然橡胶(NR)上制备了一种新型抗氧剂。傅里叶变换红外技术用于确认 ( p PDAM) 接枝到 NR 骨架上。将接枝共聚物 (NR - g - p PDAM) 作为抗氧化剂加入到三元乙丙橡胶 (EPDM) 橡胶混合物中。为了比较的目的，一种广泛使用的抗氧化剂N -(1,3-二甲基丁基) -N'-苯基-p除了没有抗氧化剂的空白样品外，还使用了-苯二胺 (6PPD)。EPDM 硫化橡胶的流变特性是使用摆盘式流变仪测定的。_{在暴露于热和紫外线/臭氧 (UV/O 3} ) 加速老化之前和之后测量了 EPDM 硫化橡胶的不同机械性能。结果表明，接枝抗氧剂 NR - g - p PDAM 对于 EPDM 橡胶硫化胶比商业抗氧剂（6PPD）更有效。含有 EPDM 的接枝 (NR- g - p PDAM) 抗氧化剂表现出良好的性能，因此有望满足工业、汽车和建筑应用的主要要求。

更新日期：2021-10-21

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