公开(公告)号：US20040138324A1

公开(公告)日：2004-07-15

申请号：US10646355

申请日：2003-08-22

Applicant: Massachusetts Institute of Technology

Inventor： Richard R. Schrock ,  Robert Baumann

IPC: C08G002/00 ,  C08F002/46 ,  C08J003/28

CPC classification number: C07F7/28 ,  C07C217/08 ,  C07C217/90 ,  C07F7/00 ,  C07F7/003 ,  C08F10/00 ,  Y10S526/903 ,  C08F4/64141

Abstract: Processes for the living polymerization of olefin monomers with terminal carbon-carbon double bonds are disclosed. The processes employ initiators that include a metal atom and a ligand having two group 15 atoms and a group 16 atom or three group 15 atoms. The ligand is bonded to the metal atom through two anionic or covalent bonds and a dative bond. The initiators are particularly stable under reaction conditions in the absence of olefin monomer. The processes provide polymers having low polydispersities, especially block copolymers having low polydispersities. It is an additional advantage of these processes that, during block copolymer synthesis, a relatively small amount of homopolymer is formed.

Abstract translation: 公开了具有末端碳 - 碳双键的烯烃单体的活性聚合方法。 该方法使用引发剂，其包括金属原子和具有两个15原子和16个原子或3个15原子的配体。 配体通过两个阴离子或共价键和二价键与金属原子结合。 引发剂在不存在烯烃单体的反应条件下特别稳定。 该方法提供具有低多分散性的聚合物，特别是具有低多分散性的嵌段共聚物。 这些方法的另外的优点是，在嵌段共聚物合成期间，形成相对少量的均聚物。