Chemistry Paper 2 Extra Information Flashcards
1
Q
What is the structure of thermosoftening (thermoplastic) polymers?
A
- Tangled polymer chains
- No cross-links between chains
- Weak intermolecular forces of attraction between chains
- Softens when heated
2
Q
What is the structure of thermosetting (thermoset) polymers?
A
- Contains cross-links between chains
- Cross-links provide strong covalent bonds between polymer chains meaning it does not break when heated
- Remains hard when heated
3
Q
What is the structure of starch polymers?
A
- Polymer chains are branched
- Polymer chains cannot line up close to each other
- This results in weak intermolecular forces of attraction between chains
- This makes starch soluble
- Starch is used as an energy source in plants
4
Q
What is the structure of cellulose polymers?
A
- Polymer chains are straight
- Polymer chains line up neatly next to each other
- This results in stronger intermolecular forces of attraction between chains
- This makes cellulose more fibrous and insoluble
- Cellulose is used to give plants structure and keep them strong
5
Q
What are monosaccharides, disaccharides and polysaccharides?
A
- Monosaccharides is one unit
- Disaccharides are two monomers joined together by condensation polymerisation
- Polysaccharides is made up of a long chain of monosaccharides joined together by condensation polymerisation
6
Q
What are some examples of monosaccharides?
A
- Glucose
- Fructose
- Galactose
7
Q
What are some examples of disaccharides?
A
- Sucrose
- Maltose
- Lactose
8
Q
What are some examples of polysaccharides?
A
- Starch
- Cellulose
- Glycogen
