A2- Polymers
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What are condensation polymers?
polymers that release a small molecule (water) when they form
What monomers form polyamides?
dicarboxylic acids and diamines
What bond is formed when dicarboxylic acids and diamines react?
amide linkage
Draw an amide linkage
O=C-NH-
What is one example of a polyamide?
Nylon-6,6 and Kevlar
What monomers make up nylon?
hexamethylenediamine and hexanedioic acid
What monomers make up Kevlar?
1,4-benzenedicarboxylic acid and 1,4-benzenediamine
Why are polyamides strong?
made of long chain molecules
What are polyesters made from?
diols and dicarboxylic acids
What bond is formed when a dicarboxylic acid and diol react?
ester linkage
What is one example of a polyester? What monomers is it made from?
Terylene (PET) ethanediol and 1,4-benzenedicarboxylic acid
What monomers can react with themselves to form a polymer?
molecules with 2 different functional groups such as amino acids
Why can condensation polymers be broken down by hydrolysis?
water is attracted too and reacts with polar regions which means links can be broken down
Why can hydrogen bonds form between condensation polymers?
polar bonds
What can polymers (such as Kevlar) be used for?
heat proof or bulletproof materials
Why are polyalkenes difficult to dispose of?
• inert and have no polar bonds • non-biodegradable • have to be burned
What is released when polyalkenes are burnt?
SO2, CO can cause acid rain