A laboratory has four compounds in stock.
| Compound | Structural formula |
|---|---|
| K | CH2=CHCH2CH3\text{CH}_2{=}\text{CHCH}_2\text{CH}_3CH2=CHCH2CH3 |
| L | CH3CH2CH2CH3\text{CH}_3\text{CH}_2\text{CH}_2\text{CH}_3CH3CH2CH2CH3 |
| M | HO-CH2-CH2-CH2-OH\text{HO-CH}_2\text{-CH}_2\text{-CH}_2\text{-OH}HO-CH2-CH2-CH2-OH |
| N | HOOC-CH2-CH2-COOH\text{HOOC-CH}_2\text{-CH}_2\text{-COOH}HOOC-CH2-CH2-COOH |
The laboratory uses some of these compounds to make two polymers.
Polymer 1 has the repeating unit [-CH2-CH(CH2CH3)-]n\left[\text{-CH}_2\text{-CH}(\text{CH}_2\text{CH}_3)\text{-}\right]_n[-CH2-CH(CH2CH3)-]n.
Polymer 2 is a polyester.
State which compound is used to make polymer 1 by addition polymerisation.
Give the molecular formula of one repeating unit of polymer 1.
State which two compounds can react repeatedly to make polymer 2.
Name the small molecule produced each time a new link forms in polymer 2.