Polymers functionalized with nitroso compounds
A method for preparing a functionalized polymer, the method comprising the steps of: (i) polymerizing monomer with a coordination catalyst to form a reactive polymer; and (ii) reacting the reactive polymer with a nitroso compound.
1. A functionalized cis-1,4-polydiene defined by the formula:
where π is a cis-1,4-polydiene chain having a cis-1,4-linkage content that is greater than 60%, where β is a mono-valent organic group, and where R′ is a hydrogen atom or a mono-valent organic group.
2. The functionalized cis-1,4-polydiene of claim 1 , where the cis-1,4-polydiene chain has a cis-1,4-linkage content that is greater than 75%.
3. A functionalized cis-1,4-polydiene prepared by the steps of:
(i) polymerizing conjugated diene monomer with a coordination catalyst to form a reactive cis-1,4-polydiene having a cis-1,4-linkage content that is greater than 60%; and
(ii) reacting the reactive cis-1,4-polydiene with a nitroso compound.
4. The functionalized cis-1,4-polydiene of claim 1 , where β is an aliphatic, a cycloaliphatic, an aromatic, or a heterocyclic group.
5. The functionalized cis-1,4-polydiene of claim 4 , where β is an aliphatic group.
6. The functionalized cis-1,4-polydiene of claim 4 , where β is a cycloaliphatic group.
7. The functionalized cis-1,4-polydiene of claim 4 , where β is an aromatic group.
8. The functionalized cis-1,4-polydiene of claim 4 , where β is a heterocyclic group.
9. The functionalized cis-1,4-polydiene of claim 5 , where the heterocyclic group is aromatic.
10. The functionalized cis-1,4-polydiene of claim 5 , where the heterocyclic group is non-aromatic.
11. The functionalized cis-1,4-polydiene of claim 1 , where β is bonded to the nitrogen atom through a carbon atom within β.
12. The functionalized cis-1,4-polydiene of claim 1 , where β is bonded to the nitrogen atom through a nitrogen atom within β.
13. The functionalized cis-1,4-polydiene of claim 1 , where β is bonded to the nitrogen atom through an oxygen atom within β.
14. The functionalized cis-1,4-polydiene of claim 1 , where β is bonded to the nitrogen atom through a sulfur atom within β.