Polyacrylonitrile, average Mw 150,000

• Catalog Number: ACM25014419
• Product Name: Polyacrylonitrile, average Mw 150,000
• CAS: 25014-41-9
• Category: Main Products
• Description: Polyacrylonitrile (PAN) is a synthetic polymer that has been widely used in recent years for its unique properties and potential applications. It is a linear, thermoplastic polymer composed of acrylonitrile monomers.
• Synonyms: POLYACRYLONITRILE; 2-Propenenitrile,homopolymer; acrylonitrile, polymers; acrylonitrilehomopolymer; acrylonitrilepolymer
• IUPAC Name: prop-2-enenitrile
• Molecular Weight: average Mw 150,000
• Molecular Formula: (C3H3N)n
• Canonical SMILES: (SMILES String) C=CC#N
• InChI: 1S/C3H3N/c1-2-3-4/h2H,1H2
• InChI Key: NLHHRLWOUZZQLW-UHFFFAOYSA-N
• Boiling Point: 77.3ºC at 760mmHg
• Melting Point: 317°C
• Density: 1.184 g/mL at 25 °C (lit.)
• Appearance: White powder
• Application: PAN is used in a variety of industries such as automotive, aerospace and medical. It is also a versatile material that can be used in a variety of applications, including medical implants, nanofibers and fuel cells.
• Storage: store at 10°C - 25°C, close container well
• EC Number: 203-466-5
• Features And Benefits: PAN is known for its good thermal stability, high mechanical strength, and excellent electrical properties.
• Hazard Codes: Switzerland: 39069090 - USA: 3906905000 - Slovakia: 3906909090 - UK: 3906909090 - China: 3906909000
• Hazard Statements: Harmless-use normal precautions
• MDL Number: MFCD00084395
• Refractive Index: 1.514
• Stability: Stable. Incompatible with strong oxidizing agents.
• Transition Temperature: Tm 317 °C; Tg 85 °C
• UN Number: 1093
• WGK Germany: 3

Case Study

Preparation and Application of Polyacrylonitrile-Derived Carbon Nanofibers

Zhang L, et al. Journal of Materials Science, 2014, 49, 463-480.

Polyacrylonitrile (PAN) nanofibers can be easily prepared by electrospinning technology, and subsequent stabilization and carbonization treatments are a simple and convenient way to create continuous carbon nanofibers. Various carbon nanofiber materials obtained from PNA nanofibers have great potential for energy conversion and storage, catalysis, sensors, adsorption/separation, and biomedical applications.
· Electrospinning of PAN
Electrospinning of PAN is driven by electrical force instead of mechanical force and follows a different thinning mechanism. Applying a suitable potential, a jet of PAN solution is ejected from the tip of the Taylor cone and electrospinning begins. Due to the concomitant high specific surface area, electrospun PAN mats have seen extensive uses in the fields of adsorption/filtration/separation and catalysis.
· Carbonization of Electrospun PAN Nanofibers
Stabilization of electrospun PAN nanofibers was carried out in air at temperatures from 200 to 300 °C, while carbonization was further carried out in an inert atmosphere up to 2800 °C. In order to reduce mass loss and dimension shrinkage, progressive and multi-stage heating procedures were developed to cover stabilization and carbonization.

Preparation of Sulfurized Polyacrylonitrile for High-Performance Lithium-Sulfur Batteries

Zhao X, et al. Journal of Materials Chemistry A, 2021, 9(35), 19282-19297.

Sulfurized polyacrylonitrile (SPAN) can be synthesized by simply heating polyacrylonitrile (PAN) and sulfur powder under the protection of an inert atmosphere. SPAN is considered an alternative sulfur cathode material for practical applications in lithium-sulfur batteries.
Synthesis conditions for synthesizing SPAN from PAN
· Synthesis temperature and time span: SPAN matrix can be synthesized from PAN over a wide sulfurization temperature range. According to statistics, the better electrochemical performance of SPAN mostly appears at 300~450℃, and the capacity trough appears around 500℃. The complete reaction between sulfur and PAN requires a critical time span of 3-6 h to complete the formation of the SPAN matrix.
· Vapor pressure: Morphology, chemical structure, surface area and conductivity are regulated by vapor pressure. Adjusting the appropriate vapor pressure to 5 MPa tends to complete the cyclization of PAN in SPAN at a high C/H ratio of 3:1.
· Molecular weight of PAN: PAN with narrower molecular weight and higher structural purity will lead to better electrochemical performance of Li-SPAN batteries. For example, using PAN with a molecular weight of 550,000 g/mol, the sulfur content can be close to 55 wt% and the sulfur utilization rate exceeds 98%.

Preparation of Polyacrylonitrile-Based Films for Resistive Type Gas Sensor

Semenistaya T V. Advanced Materials: Manufacturing, Physics, Mechanics and Applications. 2016: 61-77.

PAN is used as a film forming matrix that prevents from aggregation of the dispersed nanoparticles, due to its ability to form very adherent organic coatings chemically grafted on the metallic substrate. A novel resistive type gas sensor, based on polyacrylonitrile composite matrix, was applied for determination of NO2, Cl2, NH3 and gasoline vapors at room temperature.
PAN-based films via pyrolysis method
· The metal-containing PAN films were fabricated by pyrolysis method under the influence of incoherent IR-radiation under low vacuum conditions.
· Initial solutions were prepared by dissolving 0.8 g PAN and a modifying additive in an amount of 0.2-10 wt% in 20 ml DMF under stirring at 90 °C.
· After being cooled down to room temperature, the initial solutions were deposited (centrifuged) onto polycor substrates and then were dried at 90 °C for 30 min.
· The following components were used: PAN as a conductive polymer matrix, copper chloride (II) CuCl2, silver nitrate (I) AgNO3, chrome chloride (III) CrCl3 and cobalt chloride (II) CoCl2 as modifying additives for increasing the selectivity and adsorption activity of the films, dimethylformamide (DMF) as a solvent.