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Chemistry A level > 3.12 Polymers > Flashcards

3.12 Polymers Flashcards

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1
Q

What is condensation

A

Small molecule eliminated (usually H2O) to form a larger molecule

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2
Q

How many monomers are condensation polymers usually formed from

A

2

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3
Q

What properties do these monomers forming condensation polymers have

A

Each has 2 functional groups

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4
Q

Examples of condensation polymers

A

Polyesters
Polyamides
Polypeptides

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5
Q

What is the linkage in a polyester

A

The ester linkage

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6
Q

What are the 2 monomers which form a polyester (generic names and structures)

A

Diol and dicarboxylic acid or a molecule with both alcohol and a carboxylic acid functional groups

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7
Q

Draw a generic repeating unit for a polyester

A

Google

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8
Q

Which monomers is Terylene made from

A

Benzene-1,4-dicarboxylic acid
Ethane-1,2-diol

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9
Q

Draw the repeating unit of Terylene

A

google

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10
Q

What is Terylene used for

A

As a fibre for making clothes

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11
Q

What is the linkage in a polyamide

A

Peptide linkage
google

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12
Q

What are the 2 monomers used to form a polyamide (generic names and structures)

A

Diamine and dicarboxylic acid

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13
Q

Examples of polyamides

A

Nylon, kevlar

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14
Q

What is Kevlar used for

A

In body armour eg bullet proof vests

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15
Q

Which monomers is kevlar made from

A

1,4-diaminobenzene
Benzene-1,4-dicarboxylic acid

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16
Q

What is the repeating unit of kevlar

A

google

17
Q

Why is kevlar so strong

A

Rigid chains and close packing of flat aromatic rings

18
Q

Draw the repeating unit of a polypetide

A

google

19
Q

Why are poly(alkenes) not biodegradable

A

Non-polar CH bonds and CC bonds

20
Q

Why is it bard to burn poly(alkenes)

A

Releases CO2, CO, C and other toxic chemicals from monomers

21
Q

Why cant condensation polymers be broken down

A

They have polar bonds

22
Q

How are condensation polymers broken down

A

Hydrolysis

23
Q

What does draw the polymer mean

A

Draw with square brackets, n, and trailing bonds

24
Q

What does draw the repeating unit mean

A

Just draw the molecule, with trailing bonds - no brackets or n

25
Q

What is the difference between addition and condensation polymerisation

A

Condensation makes the polymer and eliminates a small molecule; addition polymerisation breaks C=C to form only one product (just the polymer)

26
Q

Why do polyesters not show hydrogen bonding

A

All O-H bonds are removed during polymerisation

Chemistry A level (48 decks)

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