Branched EHNBR and its properties with enhanced low-temperature performance and oil resistance

Liang, Lu; Dong, Jianjun; Yue, Dongmei

doi:10.1039/c9ra03656c

Cited by 9 publications

(4 citation statements)

References 29 publications

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“…It attributes to the ionic/ polar interaction between NBR's nitrile groups and CaCO 3 . In addition, the CO bending vibration of the carbonate group of CaCO 3 merged with the CH 2 bending vibration of butadiene segments of NBR in the NBR/CaCO 3 composite, which was centered at 1420 cm −1 39,40 . The original CH 2 bending vibration of NBR (i.e., 1440 cm −1 ) moved to a lower wavelength region (i.e., 1420 cm −1 ) on blending with CaCO 3 .…”

Section: Resultsmentioning

confidence: 95%

“…In addition, the C O bending vibration of the carbonate group of CaCO 3 merged with the CH 2 bending vibration of butadiene segments of NBR in the NBR/CaCO 3 composite, which was centered at 1420 cm À1 . 39,40 The original CH 2 bending vibration of NBR (i.e., 1440 cm À1 ) moved to a lower wavelength region (i.e., 1420 cm À1 ) on blending with CaCO 3 . It indicated the formation of a compact phase morphology, where CaCO 3 fillers restrict the movements of the butadiene segment of NBR.…”

Section: Chemical Interactionsmentioning

confidence: 99%

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Nitrile rubber/peroxide treatment transformed recycled polyethylene into mechanically improved materials

Ghosh

Kannan

2023

SPE Polymers

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The recycled high-density polyethylene (rHDPE) feedstock containing calcium carbonate (CaCO 3 ) mineral was obtained from post-consumer single-use grocery bags. This feedstock is transformed into new composite materials with improved mechanical properties using a high-shear compounding process. The rHDPE/CaCO 3 feedstock is injected into the high-shear polymer mixer and blended with acrylonitrile-butadiene copolymer or nitrile rubber (up to 10 wt %) and crosslinked with dicumyl peroxide. The resultant materials exhibit high mechanical performance, with a maximum tensile strength of 20.3 MPa, stiffness of 1262 MPa, and impact strength of 63 kJ/m 2 . These mechanical properties are profoundly higher than those of neat rHDPE feedstock. Notably, the post-consumer plastic bags contain a high amount of CaCO 3 mineral of approximately 30 wt% (13 vol%), impacting the materials' mechanical properties with additives such as nitrile rubber. In addition, the materials' meltrheology, viscoelastic, and phase morphology are analyzed. The meltrheological characteristics indicate that the materials' complex viscosity and storage modulus are frequency-dependent, demonstrating the thermoplastic nature of the composite materials and the possibility of thermomechanical recyclability of the materials. However, treating rHDPE/nitrile rubber blends with peroxide creates resistance to the melt-flow of the materials.

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Section: Resultsmentioning

confidence: 95%

Section: Chemical Interactionsmentioning

confidence: 99%

Nitrile rubber/peroxide treatment transformed recycled polyethylene into mechanically improved materials

Ghosh

Kannan

2023

SPE Polymers

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“…It is well known that the main factor affecting the oil resistance of materials is their polarity. The introduction of epoxy groups, [1][2][3][4] amino groups, [5,6] ester groups, [7][8][9][10] and other polar groups [11,12] have great benefits in improving the resistance of rubber products in a non-polar oils. Nitrile rubber (NBR), [13][14][15][16][17][18] acrylate rubber (ACM), [19] fluororubber (FKM), [20][21][22][23][24] fluorinated silicone rubber (FSR), [22,25] and chloroprene rubber (CR) [26][27][28] can still maintain good properties after being soaked in non-polar oils after a period of time, and the increasing of polar groups in those rubber could effectively improve their oil resistance.…”

Section: Introductionmentioning

confidence: 99%

Design and Synthesis of Novel Bio‐Based Polyester Elastomer with Tunable Oil Resistance

Tang

Wang

et al. 2023

Macromol. Rapid Commun.

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Polarity determines the oil resistance property of elastomers. In this work, three bio‐based polyester elastomers (BPEs) with different mass fraction of ester groups (E) are designed and synthesized aiming to study the relationship of E and oil resistance performance, and to obtain bio‐based elastomer materials with tunable oil resistance. Through adjusting the chain length of monomers, E of poly(ethylene glycol/1,3‐propanediol/succinate/adipate/itaconate)(PEPSAI), poly(1,3‐propanediol/1,4‐butanediol/succinate/adipate/itaconate)(PPBSAI), and poly(1,3‐propanediol/1,4‐butanediol/sebacate/adipate/itaconate)(PPBSeAI) are ≈50.39%, 48.55%, and 39.68%, respectively. Results show that E has great influence on the oil resistance of BPEs. After being immersed in IRM‐903# oil for 72 h at room temperature, the changes in mass and volume of BPEs decrease along with the increasing mass fraction of ester groups, indicating improved oil resistance performance. PEPSAI with the highest mass fraction of ester groups presents better oil resistance and lower Tg (better low‐temperature resistance) than one of the most used commercial oil‐resistant rubber nitrile rubber (N230S). Thus, this work provides a promising strategy to obtain bio‐based oil resistant elastomers with practical value.

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“…Chemical modification mainly involves the introduction of a flexible third monomer into the molecular chain by grafting or copolymerization. In our group [ 16 ], epoxidation and esterification reactions were used to introduce a flexible third monomer to HNBR molecular chain, as-obtained HNBR showed non crystallized structure, decreased T g of −34.1 °C and the better low temperature performances. It indicates that the addition of the third monomer can not only reduce T g , but also inhibit crystallization.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Low Temperature Resistant Hydrogenated Nitrile Rubber Based on Esterification Reaction

Lin

et al. 2021

Polymers

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Hydrogenated Nitrile Rubber (HNBR) is widely used in aerospace, petroleum exploration and other fields because of its excellent performances. However, there remains a challenge of balancing the oil resistance and the low temperature resistance for HNBR. In this work, a series of grafted carboxyl nitrile rubber (XNBR) was prepared by the esterification reaction between active functional groups (–COOH) of XNBR and alkanols of different molecular chain lengths (C8H17OH, C12H25OH, C16H33OH, C18H37OH) or Methoxypolyethylene glycols (MPEG) of different molecular weights (Mn = 350, 750, 1000). The structure and low temperature resistance of as-obtained grafted polymers were characterized by Fourier Transform Infrared (FTIR), 1H-NMR and Differential scanning calorimetry (DSC). It was found that the glass transition temperatures (Tg) of grafted XNBR were significantly decreased. MPEG grafted polymers with better low temperature resistance were then selected for hydrogenation. As-prepared hydrogenated XNBR grafted with MPEG-1000 (HXNBR-g-1000) showed the lowest Tg of −29.8 °C and the best low temperature resistance. This work provides a novel and simple preparation method for low temperature resistant HNBR, which might be used potentially in extremely cold environments.

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Branched EHNBR and its properties with enhanced low-temperature performance and oil resistance

Abstract: Epoxide nitrile butadiene rubber (ENBR) was prepared via in situ epoxidation from nitrile butadiene rubber (NBR) with acetic acid and hydrogen peroxide.

Cited by 9 publications

References 29 publications

Nitrile rubber/peroxide treatment transformed recycled polyethylene into mechanically improved materials

Nitrile rubber/peroxide treatment transformed recycled polyethylene into mechanically improved materials

Design and Synthesis of Novel Bio‐Based Polyester Elastomer with Tunable Oil Resistance

Synthesis of Low Temperature Resistant Hydrogenated Nitrile Rubber Based on Esterification Reaction

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