摘要:

Stereospecific polymerization of α-olefin and diene hydrocarbons in the presence of catalysts of a new type proposed by Ziegler and Natta is a significant discovery of the twentieth century in the chemistry of macromolecular compounds. Heterogeneous Ziegler-Natta catalysts involving Ti and V trichlorides in combination with organoaluminum compounds have been widely used for nearly 30 years in commercial stereospecific polymerization of a number of o-olefins (propylene, hexene-l,4-methyl-pentene-1, etc.) and dienes (butadiene, isoprene, etc.). However, despite the great success achieved in practical implementation of the processes there isnocommon point of viewsofar and broad discussions are still under way as to the mechanism of polymerization and stereoregulation in the presence of the above catalysts.

ISSN:1532-1797    

DOI:10.1080/07366578708078640

出版商:Taylor & Francis Group    

年代:1987

数据来源: Taylor

摘要:

Chemical reactions require that at least two molecules or reacting groups come into close proximity so that energy, electrical charge, or chemical groups may be exchanged between them. The process of bimolecular reaction between A and B is given by Eq. (1), taking into account the diffusion step bringing the two reactions in proximity, (AB)

ISSN:1532-1797    

DOI:10.1080/07366578708078641

出版商:Taylor & Francis Group    

年代:1987

数据来源: Taylor

摘要:

This is a scanned image of the original Editorial Board page(s) for this issue.

ISSN:1532-1797    

DOI:10.1080/07366578708078639

出版商:Taylor & Francis Group    

年代:1987

数据来源: Taylor