Polyurethane Rubber - Polymers - Engineering Chemistry 1

TL;DR

Polyurethane rubber, formed by the reaction of poly alcohols and diisocyanates, is highly resistant to oxidation and organic solvents, but can be decomposed by acids and alkalis.

Transcript

click the bell icon to get latest videos from akira hello friends today we are going to study about one of the most commonly synthesized doubles also known as poly urethane rubber or isocyanide Shaba now why the mean poly you came i assassinated because the monomers used are such we are also going to study about the exact reaction of the two monome... Read More

Key Insights

• 🇵🇫 Polyurethane rubber is synthesized by the reaction of poly alcohols and diisocyanates.
• 👥 Poly alcohols contain multiple alcohol groups attached to an alkene chain.
• 🫀 Diisocyanates consist of a carbon-nitrogen group attached to a carbon atom.
• 🥺 The reaction between the monomers leads to polymerization and the formation of polyurethane rubber.
• 😑 Polyurethane rubber is highly resistant to oxidation due to its saturated structure and pre-existing oxygen double bonds.
• 😅 It shows good resistance to organic solvents, but can be decomposed by concentrated and hot acids and alkalis.
• ❓ Polyurethane rubber is commonly used for surface coatings, foams, and fibers.

Questions & Answers

Q: What are the monomers used in the synthesis of polyurethane rubber?

The monomers used are poly alcohols, such as glycol, and diisocyanates.

Q: Why is polyurethane rubber highly resistant to oxidation?

The structure of polyurethane rubber contains a saturated character and oxygen in the form of a double bond, leaving no space for additional oxygen to react and cause oxidation.

Q: How is polyurethane rubber affected by acids and alkalis?

Polyurethane rubber is attacked by concentrated and hot acids and alkalis, leading to decomposition. However, it shows good resistance to organic solvents.

Q: What are the uses of polyurethane rubber?

Polyurethane rubber is commonly used for surface coatings, as well as in the manufacturing of foams and fibers due to its lightness, heat resistance, and resistance to abrasion, chemicals, and weathering.

Summary & Key Takeaways

• Polyurethane rubber is synthesized by reacting poly alcohols and diisocyanates, leading to polymerization.

• Poly alcohols, such as glycol, have multiple alcohol groups attached to an alkene chain.

• Diisocyanates consist of a carbon-nitrogen group attached to a carbon atom.