Acetal - Wikipedia
In organic chemistry, an acetal is a functional group with the connectivity R 2 C(OR') 2. Here, the R groups can be organic fragments (a carbon atom, with arbitrary other atoms attached to that) or hydrogen , while the R' groups must be organic fragments not hydrogen.
Polyoxymethylene - Wikipedia
Polyoxymethylene (POM), also known as acetal, [4] polyacetal, and polyformaldehyde, is an engineering thermoplastic used in precision parts requiring high stiffness, low friction, and excellent dimensional stability.
What is Acetal? - Laird Plastics
2022年2月3日 · Acetal is a one-of-a-kind plastic that was created to substitute metal in a variety of applications. Acetal forms are made from copolymer and homopolymer resins, which give a high ratio of flexibility while also providing outstanding strength, stiffness, and durability.
Acetal Plastic Material Properties: High Strength, Low Friction ...
Acetal (polyoxymethylene or POM) is a high strength, low friction engineering plastic that has excellent wear properties in both wet and dry environments. Acetal is chemically resistant to hydrocarbons, solvents, and neutral chemicals.
14.3: Acetal Formation - Chemistry LibreTexts
Acetals are geminal-diether derivatives of aldehydes or ketones, formed by reaction with two equivalents (or an excess amount) of an alcohol and elimination of water. Ketone derivatives of this kind were once called ketals, but modern usage has dropped that term.
Acetyl group - Wikipedia
In organic chemistry, an acetyl group is a functional group denoted by the chemical formula −COCH3 and the structure −C (=O)−CH3. It is sometimes represented by the symbol Ac[5][6] (not to be confused with the element actinium). In IUPAC nomenclature, an acetyl group is called an ethanoyl group. An acetyl group contains a methyl group ...
Acetal - Acetal Formation, Structure, Hemiacetal with Examples of Acetal
What is Acetal? “An acetal is an organic molecule where two separate oxygen atoms are single bonded to a central carbon atom.” Two distinct oxygen atoms are singly linked to a central carbon atom in an acetal, which is an organic molecule. R 2 C (OR’) 2 is the general structure of acetals.
All You Need to Know About Acetal Plastic - Acme Plastics
2023年10月23日 · Acetal plastic, or Polyoxymethylene (POM), is a semi-crystalline, engineering thermoplastic that is resistant to moisture and many chemicals. There are 2 general types of acetal plastic: Copolymer acetal (POM-C) is free of centerline porosity which results in a lower coefficient of friction and better impact and wear properties in wet ...
17.8: Acetals as Protecting Groups - Chemistry LibreTexts
Acetals as Protecting Groups. The importance of acetals as carbonyl derivatives lies chiefly in their stability and lack of reactivity in neutral to strongly basic environments. As long as they are not treated by acids, especially aqueous acid, acetals exhibit all the lack of reactivity associated with ethers in general.
Hydrates, Hemiacetals, and Acetals – Master Organic Chemistry
2010年5月28日 · An acetal (sometimes called a ketal if originating from a ketone) contains a carbon with two single bonds to OR groups. Hydrates and hemiacetals are in equilibrium with their respective aldehydes and ketones.