UV light H removed 1. Formation of cross-links between fatty acid molecules The carbon chain becomes a radical: INITIATION 2.

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Presentation transcript:

UV light H removed 1. Formation of cross-links between fatty acid molecules The carbon chain becomes a radical: INITIATION 2.

3.dimerisation cross-linking TERMINATION

2.PROPAGATION 4. peroxide group + H 6.TERMINATION

2. 4. TERMINATION 5.oxidativecross-linking

6. UV light INITIATION more radicals are formed

Cross-links that may form as oils dry.

The are a range of possible radical induced reactions than can occur between fatty-acids and triesters to cause them to become cross-linked: consequently there are many possible products formed!