Acrylonitrile/butadiene copolymer

• CAS: 9003-18-3
• Catalog Number: ACM9003183-4
• Category: Main Products
• Molecular Weight: 107.15g/mol
• Molecular Formula: C7H9N
• Description: DryPowder
• IUPAC Name: buta-1,3-diene;prop-2-enenitrile
• Canonical SMILES: C=CC=C.C=CC#N
• InChI: InChI=1S/C4H6.C3H3N/c1-3-4-2;1-2-3-4/h3-4H,1-2H2;2H,1H2
• InChI Key: NTXGQCSETZTARF-UHFFFAOYSA-N
• Complexity: 75.9
• Covalently-Bonded Unit Count: 2
• EC Number: 614-706-7;618-357-1;927-840-9
• Exact Mass: 107.073499g/mol
• Formal Charge: 0
• H-Bond Acceptor: 1
• H-Bond Donor: 0
• Heavy Atom Count: 8
• Monoisotopic Mass: 107.073499g/mol
• Rotatable Bond Count: 1

Case Study

Thermal aging studies of acrylonitrile/butadiene copolymers

Delor-Jestin, F., et al. Polymer degradation and stability 70.1 (2000): 1-4.

Acrylonitrile/butadiene copolymers (or nitrile rubber, NBR) generally have good oil resistance and low gas permeability. Their use in automotive applications is interesting, but their aging resistance is limited due to the unsaturated main chain of the butadiene part. Thermal aging of vulcanized acrylonitrile/butadiene copolymers (NBR) at 100 °C. The analysis is based on infrared spectroscopy (surface analysis) and physical property analysis (tensile and microhardness tests). These two methods appear to be complementary and allow the description of two competing phenomena involved in the aging of elastomers (oxidation and crosslinking). It is important to emphasize that the mechanical properties of aged NBR are different from those of chloroprene rubber.
NBR sheets (2 mm thick) are directly used for thermal aging and reflection FTIR analysis or tensile testing. The choice of analytical technique and the use of a horizontal attenuated total reflection (HATR) device equipped with a germanium crystal, usually involve the first micrometer in the analysis. Mechanical properties such as elongation at break are measured on the device (100 daN, speed 200 mm/min). Thermal aging was carried out at 100 °C in a ventilated oven with natural convection. Microhardness was measured on NBR sheets. The carboxylate index (chemical oxidation) can be determined in conjunction with the evolution of the mechanical properties. The decrease in mechanical properties (e.g. elongation at break) is strongly associated with the thermal oxidation of the polymer matrix, even if a small part of the sample undergoes important oxidation. The oxidation curves of the rubber samples (based on continuous wear of the surface) show that oxidation is essentially localized in the first hundred micrometers (2 mm thick samples). However, a small but significant oxidation was also detected in the core of the thermally oxidized rubber. The loss of mechanical properties is also significant when a strong evolution of carbonyl products is observed.

Electrospun elastic acrylonitrile butadiene copolymer fibers

Zhang, Xu, and George G. Chase. Polymer 97 (2016): 440-448.

Nitrile rubber (NBR) is an acrylonitrile/butadiene copolymer. Due to its excellent oil resistance, NBR products are widely used in industries such as automobiles and aerospace. This paper discusses the preparation of acrylonitrile butadiene copolymer fibers by electrospinning. The transition from electrospraying to electrospinning mechanism was observed and studied by changing the solution composition. The diameter distribution and average diameter of electrospun fibers from solutions with different copolymer weight concentrations were determined and compared. The water contact angles of the raw material and electrospun fiber mats were measured. The results showed that the copolymer material was intrinsically hydrophobic, while the electrospun fiber mats showed higher hydrophobicity due to increased surface roughness. These properties were found to be strongly dependent on solution concentration. With increasing solution concentration, the average fiber diameter increased and the water contact angle decreased.
Acrylonitrile/butadiene copolymers were dissolved in acetone to form solutions of five copolymer concentrations by weight. All solutions were stirred at room temperature for 24 h until homogeneous without further modification. The viscosity of the copolymer solutions was measured using a viscometer. Using a typical single-needle electrospinning device, the copolymer solution was loaded into a 5 ml syringe and injected into the metal needle at a flow rate of 20 mL/h via a syringe pump. The needle was charged to 20 kV using a high-voltage power supply, and a grounded aluminum oxide foil was used as a collector located 20 cm below the needle tip.

Preparation of Hybrid Nanocomposites with Organoclay and Acrylonitrile-Butadiene Copolymers

Nah, Changwoon, et al. Polymer international 52.8 (2003): 1359-1364.

Hybrid nanocomposites containing acrylonitrile/butadiene copolymers were prepared by melt blending and their properties were compared with those of conventional rubber compounds filled with carbon black and silica. Based on X-ray diffraction and transmission electron microscopy, it was found that the obtained NBR nanocomposites generally formed an intercalated structure, although they formed an exfoliated structure when the organoclay content was sufficiently low. The acrylonitrile/butadiene copolymer nanocomposites showed a simultaneous improvement in ultimate strength and stiffness, which is usually a trade-off relationship in rubber materials. A "laminate-type" characteristic fracture morphology was observed for the acrylonitrile/butadiene copolymer nanocomposites instead of the typical "cross-hatched" morphology in conventional rubber composites. The acrylonitrile/butadiene copolymer nanocomposites also showed higher hysteresis and tension set.
Acrylonitrile/butadiene copolymer with an acrylonitrile content of 34% was selected as the rubber matrix. To prepare the hybrid nanocomposites, C38MMT was mixed into acrylonitrile/butadiene copolymer using a Banbury type internal mixer at 60 rpm and 50 °C for 10 min. A small amount of dicumyl peroxide as a curing agent was then mixed in a two-roll mill. For comparison, NaMMT, silica and conventional carbon black were also mixed with NBR using the same procedure as described above. The filler loading varied from 0 to 30 phr. The blended composites were cured in a hot press at 170 C under a pressure of 13 MPa to obtain the optimum curing time which was determined separately by an oscillating disk rheometer with a rubber sheet of approximately 2 mm thickness. To determine the interlayer spacing of the organoclay and its composites, X-ray diffraction (XRD) data between 2 and 10 were obtained in 4 min using a diffractometer using Cu Kα radiation at a generator voltage of 40 kV and a generator current of 40 mA. To evaluate the dispersion of silicate layers in the rubber matrix, cryosections of approximately 70 nm thickness were observed using a transmission electron microscope (TEM) at an accelerating voltage of 200 kV. Dumbbell-shaped specimens were cut from the cross-linked rubber sheets to measure tensile properties. Tensile modulus, strength, and elongation at break were obtained from stress-strain curves using a tensile testing machine at room temperature with a crosshead speed of 500 mm according to the procedure described in ASTM D412.

EMI shielding materials made from acrylonitrile/butadiene copolymers and their blends

Rahaman, Mostafizur, Tapan Kumar Chaki, and Dipak Khastgir. Polymer composites 32.11 (2011): 1790-1805.

Composites of carbon fibers with ethylene vinyl acetate copolymers, acrylonitrile/butadiene copolymers and their blends were prepared by melt blending technology. Stress-strain plots of different composites show that necking phenomenon increases with increasing fiber concentration in the polymer matrix. Scanning electron microscopy analysis and swelling studies indicate poor interaction between short carbon fibers and polymer matrix. The decrease in DC resistivity with increasing concentration of short carbon fibers has been explained based on the percolation theory. EMI SE increases slightly with increasing frequency of electromagnetic radiation but increases sharply with increasing fiber concentration. EMI SE also depends on the blend composition and increases with increasing concentration of ethylene vinyl acetate copolymer in the blend. With increasing fiber loading, return loss decreases but absorption loss increases. A linear relationship between EMI SE and composite thickness was observed. EMI SE was found to increase exponentially with increasing conductivity of the composite. Permeability values decrease with increasing frequency and fiber loading. The thermal properties of the composites were evaluated by thermogravimetric analysis and dynamic mechanical analysis.
The ethylene vinyl acetate copolymer, acrylonitrile/butadiene copolymer and their mixtures with carbon fiber and other ingredients and DCP) were completed under the same processing conditions, where all mixing was carried out continuously for 6 minutes at 120°C and 60 rpm shear rate. Test samples of different compositions were prepared by compression molding at 160°C and 5MPa pressure. Different composites are designated by alphanumerics; for example, the composite ENF means that it consists of a blend composition of ethylene vinyl acetate copolymer containing 20 parts of carbon fiber and acrylonitrile/butadiene copolymer 25/75 (wt%).

Custom Q&A

What is the molecular formula of Acrylonitrile/butadiene copolymer?

The molecular formula of Acrylonitrile/butadiene copolymer is C7H9N.

What are the synonyms of Acrylonitrile/butadiene copolymer?

The synonyms of Acrylonitrile/butadiene copolymer include buta-1,3-diene;prop-2-enenitrile, 68891-46-3, 68683-29-4, and 68891-47-4.

What is the molecular weight of Acrylonitrile/butadiene copolymer?

The molecular weight of Acrylonitrile/butadiene copolymer is 107.15 g/mol.

What are the component compounds of Acrylonitrile/butadiene copolymer?

The component compounds of Acrylonitrile/butadiene copolymer are 1,3-Butadiene (CID 7845) and Acrylonitrile (CID 7855).

What is the CAS number of Acrylonitrile/butadiene copolymer?

The CAS number of Acrylonitrile/butadiene copolymer is 9003-18-3.

What is the IUPAC name of Acrylonitrile/butadiene copolymer?

The IUPAC name of Acrylonitrile/butadiene copolymer is buta-1,3-diene;prop-2-enenitrile.

What is the InChI of Acrylonitrile/butadiene copolymer?

The InChI of Acrylonitrile/butadiene copolymer is InChI=1S/C4H6.C3H3N/c1-3-4-2;1-2-3-4/h3-4H,1-2H2;2H,1H2.

What is the InChIKey of Acrylonitrile/butadiene copolymer?

The InChIKey of Acrylonitrile/butadiene copolymer is NTXGQCSETZTARF-UHFFFAOYSA-N.

What is the canonical SMILES of Acrylonitrile/butadiene copolymer?

The canonical SMILES of Acrylonitrile/butadiene copolymer is C=CC=C.C=CC#N.

What are the other identifiers of Acrylonitrile/butadiene copolymer?

The other identifiers of Acrylonitrile/butadiene copolymer include CAS numbers 68683-29-4, 68891-47-4, 68891-46-3, and 88254-10-8.