BRAINCAKEHydrogen Bonding between Polymer Chains
The intermolecular forces between polymer chains control properties such as strength and melting point. AQA asks you to explain these forces for condensation polymers.
Polyamides (nylon-6,6, Kevlar and proteins) have an N-H group and a C=O group in every amide link. The H is bonded to a very electronegative N atom, so it is δ+, and the O of C=O is δ− with lone pairs. Hydrogen bonds form between the N-H of one chain and the C=O of a neighbouring chain:
N-Hδ+ ···· :Oδ−=C
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More in Condensation Polymers
- Condensation Polymers
- Polyesters
- Polyamides
- Nylon-6,6 and Kevlar
- Drawing Repeat Units
- Biodegradability of Polymers
- Disposal and Recycling of Polymers
All 8 lessons in Condensation Polymers · All AQA A-level Chemistry topics