Thiocarbonylthio Compounds (SC(Z)S−R) in Free Radical Polymerization with Reversible Addition-Fragmentation Chain Transfer (RAFT Polymerization). Effect of the Activating Group Z
作者:John Chiefari、Roshan T. A. Mayadunne、Catherine L. Moad、Graeme Moad、Ezio Rizzardo、Almar Postma、Melissa A. Skidmore, and、San H. Thang
DOI:10.1021/ma020883+
日期:2003.4.1
Free-radical polymerization in the presence of suitable addition−fragmentation chain transfer agents [SC(Z)S−R] (RAFT agents) possess the characteristics of a living polymerization (i.e., polymer products can be reactivated for chain extension and/or block synthesis, molecular weights are predetermined by RAFT agent concentration and conversion, narrow polydispersities are possible). Styrene polymerizations
Water-soluble dithioesters and method for polymerization thereof
申请人:——
公开号:US20040138492A1
公开(公告)日:2004-07-15
Disclosed are water soluble dithioesters capable of acting as chain transfer agents in preparing a vinyl-based polymer to control molecular weight and molecular weight distribution thereof as well as being capable of living polymerization even in an aqueous solution, and a method for polymerization thereof.
NOVEL RAFT AGENTS AND THEIR USE IN THE DEVELOPMENT OF POLYVINYLPYRROLIDONE GRAFTED NANOPARTICLES
申请人:University of South Carolina
公开号:US20160024234A1
公开(公告)日:2016-01-28
Nanoparticles having a plurality of PVP chains covalently bonded to a surface of the nanoparticle are provided, along with their methods of formation and the RAFT agents for the polymerization of the PVP chains. RAFT agents are generally provided, along with their methods of formation and use. Methods are also generally provided for grafting a PVP polymer onto a nanoparticle. In one embodiment, the method includes: polymerizing a plurality of monomers in the presence of a RAFT agent to form a polymeric chain covalently bonded to the nanoparticle.
Polymerization process with living characteristics and polymers made therefrom
申请人:——
公开号:US20040024132A1
公开(公告)日:2004-02-05
A free radical polymerization process suitable for synthesizingpolymers is disclosed. The process utilizes novel sulfur based chain transfer agents and is widely compatible over a range of monomers and reaction conditions. Novel polymers having low polydispersity and predictable specific polymer architecture amd molecular weight are produced by the process. The polymers produced by the process are suitable for use as binders in automotive OEM and refinish coatings.
Raft agents and their use in the development of polyvinylpyrrolidone grafted nanoparticles
申请人:UNIVERSITY OF SOUTH CAROLINA
公开号:US10954325B2
公开(公告)日:2021-03-23
Nanoparticles having a plurality of PVP chains covalently bonded to a surface of the nanoparticle are provided, along with their methods of formation and the RAFT agents for the polymerization of the PVP chains. RAFT agents are generally provided, along with their methods of formation and use. Methods are also generally provided for grafting a PVP polymer onto a nanoparticle. In one embodiment, the method includes polymerizing a plurality of monomers in the presence of a RAFT agent to form a polymeric chain covalently bonded to the nanoparticle.