Bimetallic Chromium Catalysts with Chain Transfer Agents: A Route to Isotactic Poly(propylene oxide)s with Narrow Dispersities
Abstract
Bimetallic chromium catalysts are investigated for the enantioselective polymerization of propylene oxide. The catalyst is composed of two salen chromium species linked by an alkyl chain, the length of which significantly impacts the rate of polymerization. While the use of a chloride initiator on the catalyst resulted in bimodal molecular weight distributions, switching to a trifluoroacetate initiating group and adding a diol chain transfer agent afforded polymers of controllable molecular weight with low, unimodal dispersities.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Apr 25, 2018
- Source ID
- 10.1002/ange.201801380
Entities
People
- Geoffrey W. Coates
- Lilliana S Morris
- M Ian Childers
Organizations
- Cornell University
- National Science Foundation
- Office of Naval Research