Maya Ellison
Plastics are widely used to store corrosive liquids and concentrated acids due to their lightweight, strong, and highly resistant nature. Many factors can influence a plastic's resistance to acids, including acid concentration, acid type, temperature, and length of exposure. Some plastics have been specially developed with chemical compatibility in mind, making them ideal for storing corrosive liquids. Examples of acid-resistant plastics include ethylene-chlorotrifluoroethylene, polypropylene (PP), polyvinylidene fluoride (PVDF), and Teflon™ PTFE. These plastics exhibit excellent resistance to dilute and high-concentration acids, as well as mechanical strength, thermal resistance, and chemical inertness.
| Characteristics | Values |
|---|---|
| Nitric Acid-Resistant Plastics | Polypropylene (PP), Ethylene-chlorotrifluoroethylene, Polyvinylidene Fluoride (PVDF), Teflon™ PTFE, Kynar® PVDF, Telene® pDCPD |
| Polypropylene (PP) | Semi-crystalline thermoplastic polymer that is widely used in the manufacture of containers, bottles, and storage items. It is affordable, versatile, lightweight, and durable. |
| Ethylene-chlorotrifluoroethylene | Fluoropolymer developed for corrosive environments. Resistant to dilute and high-concentration acids. Used in chemical and pharmaceutical industries. Operating temperature range: -76 °C to 148 °C. |
| Polyvinylidene Fluoride (PVDF) | High-performance plastic with superior mechanical, physical, and chemical properties. Used in demanding environments for tanks and liners that withstand concentrated acids and corrosive chemicals at high temperatures. |
| Teflon™ PTFE | Synthetic fluoropolymer with high non-reactivity, chemical inertness, and acid resistance. Used in containers and pipework for corrosive chemicals. Has good dielectric properties, a high melting temperature, and low friction. |
| Kynar® PVDF | Fluoropolymer with high stability, purity, and resistance to temperature, harsh chemicals, and nuclear radiation. Used in chemical tank liners, piping, tubing, and other corrosive fluid handling applications. |
| Telene® pDCPD | Has high tensile strength, impact resistance, and heat distortion temperature. Offers flexibility, flame resistance, and rigidity through additives. Environmentally friendly as it can be easily disposed of without creating heavy metals, ashes, or dangerous gases. |
Explore related products
What You'll Learn
Polypropylene (PP) is a semi-crystalline thermoplastic polymer
Polypropylene (PP), also known as polypropene, is a thermoplastic polymer with a wide range of applications. It is produced through the chain-growth polymerization of the monomer propylene. Polypropylene is a semi-crystalline thermoplastic polymer that is partially crystalline and contains regions that are both crystalline and amorphous in its molecular structure. The crystalline regions are highly ordered and tightly packed, while the amorphous regions are disordered and loosely packed. The degree of crystallinity in polypropylene can vary depending on its tacticity, which refers to the arrangement of methyl groups in the polymer chain.
Polypropylene's semi-crystalline nature gives it a combination of desirable properties, including toughness, rigidity, and heat resistance. It has a high strength-to-weight ratio and is known for its durability and versatility. Its chemical inertia and acid compatibility make it suitable for manufacturing containers, bottles, and storage items. Polypropylene is also used in various industries, including packaging, textiles, healthcare, pipes, automotive, and electrical applications.
The different types of polypropylene include homopolymer, random copolymer, and block copolymer. The addition of comonomers like ethylene or ethylene-propylene rubber can modify its properties, such as impact strength, crystallinity, melting point, and transparency. Polypropylene's ability to be easily processed through injection moulding and its favourable mechanical properties contribute to its popularity across industries.
However, polypropylene's semi-crystalline structure also presents challenges in certain applications, such as 3D printing, where it tends to warp during cooling due to its poor bonding properties. Additionally, polypropylene is susceptible to degradation at temperatures above 100 °C, and it may require protection from oxidation and other environmental factors. Nevertheless, polypropylene remains a widely used commodity plastic known for its strength, versatility, and corrosion resistance.
Overall, polypropylene (PP) is a semi-crystalline thermoplastic polymer that offers a unique combination of characteristics, making it a versatile and valuable material in various industrial and manufacturing applications. Its toughness, rigidity, heat resistance, and acid compatibility contribute to its popularity and wide range of uses.
Microwaving Plastics: Shrinking Art for Creative Minds
You may want to see also
Explore related products
Ethylene-chlorotrifluoroethylene is a fluoropolymer
Ethylene-chlorotrifluoroethylene, commonly known by the trade name Halar®, is a fluoropolymer with excellent resistance to dilute and high-concentration acids. It is a tough, melt-processable, semi-crystalline thermoplastic with good chemical resistance and barrier properties. It also has good tensile and creep properties and good high-frequency electrical characteristics. Its high chemical resistance and fire resistance make it ideal for use in the semi-conductor market.
Ethylene-chlorotrifluoroethylene (ECTFE) is a copolymer of ethylene and chlorotrifluoroethylene, with a molecular structure that consists of carbon, fluorine, chlorine, and hydrogen. It is an expensive material, with a whitish semi-opaque colour. ECTFE has a wide operating temperature range of -76 °C to 148 °C, and it exhibits excellent resistance to radiation, withstanding up to 200 Mrad of exposure to cobalt 60.
ECTFE is commonly used in the chemical and pharmaceutical industries for applications such as chemically resistant linings, valve and pump components, and barrier films. It is also used in the manufacture of tanks and liners that can withstand concentrated acids and other highly corrosive chemicals stored at high temperatures.
The resin used to create ECTFE is not hygroscopic, meaning it does not need to be dried prior to moulding. Conventional moulds, such as plaster cast aluminium, can be used for ECTFE moulding. To produce a smooth interior surface and uniform wall thickness, a corner radius greater than 1.25 cm is recommended. To facilitate the release of the mould, small amounts of silicone or fluorocarbon release agents can be sprayed onto the mould surface.
Overall, ethylene-chlorotrifluoroethylene is a highly resistant fluoropolymer that is well-suited for use in corrosive environments and has a wide range of applications in various industries.
Protecting Plastics: Blocking UV Rays
You may want to see also
Explore related products
Polyvinylidene fluoride (PVDF) is a high-performance plastic
PVDF is synthesised through the radical polymerisation of vinylidene fluoride (VF2), which can be further controlled by introducing a precursor polymer through copolymerisation. This process results in a regioisomer of PVDF, with the configuration of the monomer in the chain being either "head to head" or "head to tail". PVDF can be melted and reprocessed multiple times without significant degradation, making it recyclable. However, the availability of PVDF recycling may be limited compared to common materials.
PVDF is known for its high resistance to chemicals, UV radiation, and extreme temperatures. It is non-flammable, self-extinguishing, and exhibits low permeabilities to gases and liquids. These characteristics make PVDF suitable for various industries, including the chemical and pharmaceutical sectors. PVDF is also used in demanding environments, such as the manufacture of tanks and liners that can withstand concentrated acids and corrosive chemicals stored at high temperatures.
In the biomedical field, PVDF is valuable for its resistance to solvents, heat, and chemical corrosion, as well as its low protein binding properties. It is used in immunoblotting, membrane filtration devices, and the preparation of medications and analytical samples. Additionally, PVDF is considered non-toxic and biocompatible, making it suitable for medical applications such as implants, prosthetics, and drug delivery systems.
PVDF also has applications in specialty monofilament fishing lines, artificial turf blades, sensors, actuators, energy storage, pressure sensors, and lithium-ion batteries. Its piezoelectric properties are particularly useful in these contexts. Overall, PVDF is a versatile and high-performance plastic with unique resistance characteristics, making it valuable across multiple industries.
Burnt Plastic Taste: What Drugs Are to Blame?
You may want to see also
Explore related products
PFTE and PVDF withstand high-concentration acids
When it comes to plastic's resistance to acids, several factors come into play, including acid concentration, acid type, temperature, and length of exposure. While some plastics can withstand low concentrations of acids, others are designed to handle high-concentration acids without degradation.
PFTE (Polytetrafluoroethylene or Teflon) and PVDF (Polyvinylidene Fluoride) are two types of plastics that offer excellent resistance to a wide range of high-concentration acids. PFTE, with its wide operating temperature range of -76 °C to 148 °C, is highly resistant to various chemicals, including hydrochloric acid, sulfuric acid, nitric acid, and organic solvents such as acetone and benzene. It is also non-reactive to most chemicals and resistant to UV radiation and weathering.
PVDF, on the other hand, is known for its superior mechanical, physical, and chemical properties within the fluoropolymer family. It has a high-temperature resistance of up to 150 °C and is commonly used in demanding environments, such as the manufacture of tanks and liners that must withstand concentrated acids and corrosive chemicals at high temperatures. PVDF is often chosen for its excellent chemical resistance, high purity, and superior mechanical properties, making it ideal for protective coatings in the chemical industry.
Both PFTE and PVDF are suitable for long-term exposure to aggressive chemicals and are among the top choices for applications requiring corrosion-resistant materials. However, it is important to refer to specific data sheets and evaluate the constraints to ensure the best compatibility for the intended application.
In summary, PFTE and PVDF are exceptional plastics that can withstand prolonged contact with a diverse range of high-concentration acids. Their resistance to degradation, mechanical strength, and ability to handle demanding conditions make them preferred options for storing corrosive liquids and other challenging applications.
Casting Plastic Models: Cheap and Easy Methods
You may want to see also
Explore related products
PTFE is a synthetic fluoropolymer
Polytetrafluoroethylene (PTFE) is a synthetic fluoropolymer of tetrafluoroethylene. PTFE is chemically inert and has a wide range of applications due to its versatility. It is a fluorocarbon solid, consisting wholly of carbon and fluorine. PTFE is hydrophobic, meaning neither water nor water-containing substances can wet its surface. This property, along with its low coefficient of friction, makes PTFE ideal for non-stick cookware. PTFE is also used as an insulator for wiring and cables, especially in computer applications, due to its excellent electric insulation properties and high melting point.
PTFE is a highly stable polymer, thanks to the strength of the carbon-fluorine bonds in its structure. Its non-reactivity and high-temperature tolerance make it suitable for industrial pipes and hose assemblies, particularly those involving corrosive chemicals. PTFE architectural membranes are created by coating a woven glass-fibre base cloth with PTFE, resulting in a strong and durable material used in tensile structures.
PTFE is commonly known by the brand name Teflon, which was originally invented by DuPont in 1938. Teflon is a spin-off from DuPont, now manufactured by Chemours, a corporate spin-off of DuPont. PTFE has been used in various industries, including the creation of the roof of the Hubert H. Humphrey Metrodome in Minneapolis, covering 20 acres with a white double-layered PTFE-coated fiberglass dome.
PTFE is also used in mechanical engineering applications due to its low friction properties. It is often utilised for slide bearings, slide plates, gears, and other working parts that require a sliding action. Additionally, PTFE can be found in brake hoses, contributing to improved flow characteristics. While PTFE offers numerous advantages, it is important to note that its pyrolysis products can induce influenza-like symptoms, known as "polymer-fume fever".
The Ultimate Guide to Installing Plastic Film on Windows
You may want to see also
Frequently asked questions
Some plastics that are resistant to nitric acid include Kynar® PVDF, Telene® pDCPD, and Teflon™ PTFE.
Kynar® PVDF (polyvinylidene fluoride) is a high-performance plastic with superior mechanical, physical, chemical, thermal, and flame-resistant properties. It is used in the manufacture of tanks and liners that can withstand concentrated acids and corrosive chemicals stored at high temperatures.
Telene® pDCPD is a raw material with a low energy balance, making it an environmentally friendly choice as it can be easily disposed of without creating heavy metals, ashes, or dangerous gases. It also has high tensile strength and impact resistance.
Teflon™ PTFE (polytetrafluoroethylene) is a very non-reactive synthetic fluoropolymer with excellent thermal properties. It has a wide operating temperature range from −76 °C to 288 °C (550 °F). It is known for its low coefficient of friction, with virtually nothing sticking to it, and is widely used as a non-stick coating for cookware.
