Amelioration of acrylonitrile–butadiene copolymer properties using natural rubber graft p‐aminophenol

Abstract

A two-roll mill machine was used for the grafting of p-aminophenol (pAP) onto natural rubber (NR). The prepared NR graft p-aminphenol (NR-g-pAP) was characterized by 1 H NMR and IR spectroscopy techniques. The goal of this article is to study the effect of commercial antioxidants,, and the prepared NR-g-pAP, on the mechanical properties of acrylonitrile-butadiene (NBR) vulcanizates, the fluid compatibility of NBR vulcanizates, the hydraulic brake and clutch fluid dot, the diffusion out for NBR vulcanizate components, and the compression recovery of NBR vulcanizates. This study indicates that the NBR copolymer vulcanizate which contains the prepared NR-g-pAP has good protection against mechanical stress and the diffusion out of NBR vulcanizate components. The 6PPD and the prepared NR-g-pAP ameliorates the fluid compatibility of the oil seals, which is based on NBR as elastomer, and the hydraulic brake and clutch fluid dot.

Study of the effect of natural rubber‐graft‐o‐aminophenol on the thermal stability and mechanical properties of nitrile rubber

“…Because the aging time duration have undesirable effect on the mechanical properties of the NBR vulcanizates, increase the ultrasonic attenuation coefficient as shown in Figure 8, and cleavage the crosslinking density between the chains of the NBR vulcanizates. 4,13 Figures 6 and 7 indicate that the retained tensile strength, % and the retained elongation at break, % of the NBR vulcanizate which contain the grafted antioxidant NR-graft-o-AP is higher than both of the NBR vulcanizate which contain PBN as commercial antioxidant and the control vulcanizate. Because the o-aminophenol part in the prepared NR-graft-o-AP is oxidized.…”

Extraction resistance and mechanism of a macromolecular hindered phenol antioxidant in natural rubber

“…[2][3][4][5] In order to minimize such drawbacks, increasing the molecular weight of hindered phenols by functionalization of polymer has attracted much attention in recent years. [6][7][8][9][10] The polymer include natural rubber, [11][12][13] polyolefin, [14][15][16] polybutadiene, [17][18][19] and others. 10,20,21 Podesva et al 22,23 synthesized a polymerbound antioxidant by free-radical addition reaction between a sterically hindered phenolic antioxidant with a sulfanyl group and OH-telechelic polybutadiene.…”

Synthesis and characterization of polyhydroxylated polybutadiene binding 2,2′‐thiobis(4‐methyl‐6‐tert‐butylphenol) with isophorone diisocyanate

“…Due to low thermal stability, poor migration resistance and poor extraction resistance, the physical loss of low molecular weight antioxidant was large during polymer processing and long‐term service, which severely restricted its applications. In order to overcome the problem, macromolecular antioxidant had attracted much attention in recent years . For example, Kim synthesized several kinds of polymeric antioxidants by copolymerization or homopolymerization of functional monomers containing hindered phenol.…”

“…In order to overcome the problem, macromolecular antioxidant had attracted much attention in recent years. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] For example, synthesized several kinds of polymeric antioxidants by copolymerization or homopolymerization of functional monomers containing hindered phenol. El-Wakil et al [9][10][11][12] studied the grafting of o-aminophenol, 1,2-phenylenediamine,1,5-diaminonaphthalene, and N-(4-aminodiphenyl methane) acrylamide onto natural rubber.…”