Question

Predict the structure of the polyurethane polymer.

Question Step-growth polymerization is another method used to make countless polymers, such as polyethylene terephthalate (PET), Nylon, Kevlar, and polyurethane Let's take a look at how polyurethanes are made Step 1: The alcohol (ethylene glycol) is deprotonated to form an alkoxide Step 2: The alkoxide attacks the electrophilic carbon of the isocyanate Step 3: The nitrogen is protonated to give a carbamate intermediate Step 4: Another alkoxide attacks the isocyanate (red) to form another carbamate. This process is repeated until the ethylene glycol and isocyanate molecules are consumed. Predict the structure of the polyurethane polymer 200 isocyanate Base но Ethylene glycol part of antifreeze Pol thane Your answer a. 0 O b. 0 O d. 0 0

Answer 1

CH2 Di-isocyanate Polyol C-N Polyurethane

Question Step-growth polymerization is another method used to make countless polymers, such as polyethylene terephthalate (PET), Nylon, Kevlar, and polyurethane Let's take a look at how polyurethanes are made Step 1: The alcohol (ethylene glycol) is deprotonated to form an alkoxide Step 2: The alkoxide attacks the electrophilic carbon of the isocyanate Step 3: The nitrogen is protonated to give a carbamate intermediate Step 4: Another alkoxide attacks the isocyanate (red) to form another carbamate. This process is repeated until the ethylene glycol and isocyanate molecules are consumed. Predict the structure of the polyurethane polymer isocyanate Base но Ethylene glycol part of antifreeze Pol thane -NH-COO-group is urethane 0 too' O b. 0 2 rings are seperated by -CH2 group, but here they are fused This is polycarbonate O d. this is polyamide (-CO-NH-) like Nylon 0

Hope this helped you!

Thank You So Much! Please Rate this answer as you wish.("Thumbs Up")