| 主权项 |
1. A process for preparing a copolymer including one or more phosphorus-containing mer units, the process comprising:
providing an anionic initiator, and combining conjugated diene monomer, vinyl organophosphine monomer, and optionally monomer copolymerizable therewith with the anionic initiator to anionically polymerize the conjugated diene monomer, vinyl organophosphine monomer, and optionally monomer copolymerizable therewith, where the vinyl organophosphine is defined by the formula I: where R1 and R2 are each independently monovalent organic groups, or where R1 and R2 join to form a divalent organic group, and where R3, R4, and R5 are each independently hydrogen or monovalent organic groups, or where R3 and R4 join to form a divalent organic group, where the copolymer including one or more phosphorus-containing mer units is a linear copolymer. |
