Construction of sacrificial bonds and hybrid networks in EPDM rubber towards mechanical performance enhancement

Li, Chengjie; Wang, Yujie; Yuan, Zun; Ye, Lin

doi:10.1016/j.apsusc.2019.04.064

Cited by 55 publications

(46 citation statements)

References 39 publications

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“…Interestingly, all the curves of PA1012/EPDM‐g‐MAH blends are located over that of neat PA1012, while η* of some PA1012/EMG‐Zn blends are lower than neat PA1012 in the whole frequency region, especially for the blends of PA1012/EMG‐Zn‐1, which may be related to the decomplexation of metal‐ligand units at high temperature. [ 23 ] These results indicate that neutralization not only affects mechanical properties of PA1012, but also changes its processing characteristics and avoids the shortcoming of high melting viscosity for toughening plastics with rubber.…”

Section: Resultsmentioning

confidence: 97%

“…[ 30 ] For EMG‐Zn ionomers, the new absorption peaks at 1598 cm −1 and 1660 cm −1 are observed and corresponding to the asymmetric stretching vibration peaks of carboxylate ion (COO − ) and amide carbonyl stretching vibration peak, respectively. [ 23,31 ] The ionization of carboxyl group demonstrates the formation of Zn 2+ ‐COOH coordination units.…”

Section: Resultsmentioning

confidence: 99%

“…[ 18–20 ] Inspired by nature, constructing network structure via incorporation of sacrificial bonds (hydrogen bonding, metal‐ligand, and ion interactions) has drawn increasing attention in recent years to improve the mechanical properties of polymer blends. [ 21–24 ] These weak interactions can preferentially rupture and reversibly reform prior to the covalent bonds under small deformation, while the structure integrity is sustained, thus dissipating energy, redistributing stress, and endowing enhanced mechanical properties. Li et al.…”

Section: Introductionmentioning

confidence: 99%

“…Li et al. [ 23 ] fabricated EPDM rubber with significantly enhanced mechanical strength and toughness by incorporation of covalent crosslinks, hydrogen bonds, and Zn 2+ ‐carboxyl units. Zhang et al.…”

Section: Introductionmentioning

confidence: 99%

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Toward Largely Enhanced Toughness and Balanced Strength in PA1012/EPDM Blends via Synergistic Effect of Sacrificial Bonds and Network Structure

Sun

Wang

et al. 2021

Macro Materials & Eng

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Here, zinc‐neutralized ethylene propylene diene monomer (EPDM) ionomers with different neutralization levels are prepared through melt blending, and are then incorporated with polyamide 1012 (PA1012) to fabricate PA1012/EPDM ionomer blends. Interestingly, complex crosslinking networks are formed in the blends due to the construction of sacrificial bonds (Zn2+‐carboxyl, Zn2+‐amide). The as‐formed network structure and sacrificial bond endow the PA/EPDM blends with largely enhanced toughness (16 times higher than that of neat PA), as well as balanced strength and stiffness. Meanwhile, the rheological behaviors of PA1012/EPDM ionomer blends indicate their relative low melting viscosity, which can avoid the processing shortcomings of plastics toughened with rubber. Moreover, PA1012/EPDM ionomer blends show obvious gelation behavior, and a maximum notched Izod impact strength exhibited at the gel point, in which unique double network structure can be observed obviously, indicating that there is a corresponding correlation between the rheological and mechanical parameters. Furthermore, the supper‐toughening mechanism of PA1012/EPDM ionomer blends at gel point is explored, which origins from the large deformation and cavitation of rubber particles and the destruction of special double network morphologies. This study provides a novel and effective strategy to fabricate PA materials with outstanding toughness and excellent strength simultaneously.

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Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Toward Largely Enhanced Toughness and Balanced Strength in PA1012/EPDM Blends via Synergistic Effect of Sacrificial Bonds and Network Structure

Sun

Wang

et al. 2021

Macro Materials & Eng

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“…The XPS analysis of SBR and SBR-g-D 4 rubber samples was conducted using a Kratos Axis Ultra X-ray photoelectron spectrometer tted with a monochromatic Al Ka X-ray source (1487 eV) operating on a spot size of 300 mm. 37 2.5.5 Raman spectroscopy. The Raman spectra of SBR and SBR-g-D 4 were recorded using a WITec alpha 300RA confocal Raman spectrometer.…”

Section: Atr-ftir Analysismentioning

confidence: 99%

Effects of octamethylcyclotetrasiloxane grafting and in situ silica particle generation on the curing and mechanical properties of a styrene butadiene rubber composite

Chen

Zhang

2019

RSC Adv.

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The reinforcement of octamethylcyclotetrasiloxane (D 4 ) grafted styrene butadiene rubber ) with in situ generated silica was performed using the sol-gel reaction of tetraethoxysilane (TEOS) in latex. The characterization of SBR-g-D 4 and in situ generated silica reinforced SBR-g-D 4 was investigated by Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy. The grafting efficiency of the styrene butadiene rubber (SBR) was determined by a gravimetric method. It was found that the constant silicon content and the grafting efficiency of SBR were 1.72% and 0.13 wt% when the weight ratio of D 4 to SBR was 0.20. The effects of the D 4 and in situ generated silica content on the curing characteristics, mechanical properties and morphology of SBR latex were investigated. The mechanical properties of in situ generated silica reinforced vulcanizates were improved significantly compared to raw SBR vulcanizate when the in situ generated silica content was 18.05%. Compared with silica reinforced SBR-g-D 4 , the tensile strength, wet skid resistance and rolling resistance of the in situ generated silica reinforced SBR-g-D 4 were better. This is because of the higher crosslinking degree in the SBR-g-D 4 matrix and the strong chemical bond between SBR-g-D 4 molecular chains and in situ generated silica. Scanning electron microscopy analysis revealed good silica filler dispersion in all the reinforced SBR-g-D 4 vulcanizates.

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Influence of aviation hydraulic oil swelling on the mechanical properties of HNBR/EPDM vulcanizates reinforced by carbon black

Jiang

Wang

Liu

et al. 2022

J of Applied Polymer Sci

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The study on swelling behaviors of rubber products in liquid media is of great value for life prediction and practical application guidance. In this work, changes in the mechanical properties of hydrogenated nitrile rubber/ethylene propylene diene monomer (HNBR/EPDM) blends caused by swelling in aviation hydraulic oil YH‐15 were studied. Effects of two kinds of carbon black, N220, and N990, on the tensile properties of HNBR/EPDM blends at both unswollen and swollen states were investigated. The results turned out that N220 exhibited better reinforcing effects than N990 on HNBR/EPDM blends. The tensile properties of unfilled and filled HNBR/EPDM blends decreased rapidly at first and then tended to stabilize with the extension of swelling time in YH‐15, while the modulus at 100% declined firstly and then increased. After swelling for 72 h, the tensile strength of HNBR/EPDM blends filled with N220 decreased by more than 35%, and by comparison, it decreased by about 20% for the N990‐filled HNBR/EPDM blends. The cross‐sections of the tensile samples after swelling changed greatly compared with the unswollen samples. In addition, the effect of swelling on the hardness of the HNBR/EPDM blends was not obvious.

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Construction of sacrificial bonds and hybrid networks in EPDM rubber towards mechanical performance enhancement

Cited by 55 publications

References 39 publications

Toward Largely Enhanced Toughness and Balanced Strength in PA1012/EPDM Blends via Synergistic Effect of Sacrificial Bonds and Network Structure

Toward Largely Enhanced Toughness and Balanced Strength in PA1012/EPDM Blends via Synergistic Effect of Sacrificial Bonds and Network Structure

Effects of octamethylcyclotetrasiloxane grafting and in situ silica particle generation on the curing and mechanical properties of a styrene butadiene rubber composite

Influence of aviation hydraulic oil swelling on the mechanical properties of HNBR/EPDM vulcanizates reinforced by carbon black

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