Polymers Flashcards
What is Condensation Polymerisation?
This is when 2 different monomers with at least 2 functional groups react together. A link is made and water is eliminated
What are the 3 main types of Condensation polymers?
- Polypeptides – found in proteins
- Polyamides – formed by reacting diamines + dicarboxylic acids
- Polyesters – formed by reacting a diol and dicarboxylic acid together
How are Polyamides formed?
Formed by reacting dicarboxylic acids and diamines together forming amide links
What is Kevlar?
A polyamide that’s used in bulletproof vests, car tyres and some sport equipment as it is lightweight but strong
What is Kevlar made of?
Benzene-1,4-dicarboxylic acid and 1,4-diaminobenzene
What is Nylon 6,6?
A polyamide that is used in ropes, carpets, clothing and parachute fabric
What is Nylon 6,6 made of?
Hexanedioic acid and 1,6-diaminohexane
How are Polyesters formed?
Polyesters are formed by reacting dicarboxylic acids and diols together forming ester links
What is Terylene a.k.a PET?
A polyester that is used in plastic bottles, sheeting and clothes
What is Terylene made of?
What is Terylene made of?
How do you determine the monomer units?
Break the bond in the middle of the amide or ester link of the repeated unit and then add OH and H to each of the vote
Why are condensation polymers stronger than addition polymers?
This is because hydrogen bonds exist between the polymer chains as well as dipole-dipole and van der waals forces. Condensation polymers have polar bonds
What are Synthetic polymers?
Made from monomer units and used to make a range of items from plastic bottles, digital technology to non stick coating on pans
State 2 characteristics of Condensation Polymers
- Polar, so they are susceptible to attack from nucleophile
* Biodegradeable + broken down by hydrolysis slowly
States some characteristics of Addition Polymers?
- Saturated Molecules
- Non Polar
- Unreactive
- Don’t degrade well on ladnfills
