Block Copolymers Synthesized by ROMP-to-Anionic Polymerization Transformation

Autor:	Sasha B. Myers, Richard A. Register
Rok vydání:	2008
Předmět:	Polymers and Plastics Chemistry Organic Chemistry Chain transfer ROMP Ring-opening polymerization Inorganic Chemistry Anionic addition polymerization Polymer chemistry Materials Chemistry Copolymer Living polymerization Ionic polymerization Living anionic polymerization
Zdroj:	Macromolecules. 41:5283-5288
ISSN:	1520-5835 0024-9297
Popis:	A two-step site transformation technique is presented to convert from living ring-opening metathesis polymerization (ROMP) to living anionic polymerization of unsaturated monomers. This method permits the synthesis of well-defined diblock copolymers of controllable molecular weight and narrow molecular weight distribution, combining ROMP and anionically polymerizable monomers. The technique employs a functional terminating agent to add a styryl group to the end of the ROMP chain. The end group is then metalated to yield an active site for anionic polymerization, so that the ROMP chain acts as a macroinitiator from which the anionic block is grown. Both polycyclopentene/polystyrene and polynorbornene/polystyrene diblocks were successfully synthesized, and the method should be applicable to a broad range of monomers.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::b7e22d27ff683f78f61659ffb94f3411 https://doi.org/10.1021/ma800844g Zobrazit plný text záznamu