Accession Number : ADA295991

Title :   Well-Defined Polymers Obtained Through the Use of Controlled Radical Polymerization: the Use of Alkyl Iodides as Degenerative Transfer Agents.

Descriptive Note : Technical rept.,

Corporate Author : CARNEGIE-MELLON UNIV PITTSBURGH PA DEPT OF CHEMISTRY

Personal Author(s) : Matyjaszewski, K. ; Gaynor, S. G. ; Wang, J. S.

PDF Url : ADA295991

Report Date : 30 JUN 1995

Pagination or Media Count : 4

Abstract : Through alkyl iodides, R' - X, used as degenerative transfer agents, control of the radical polymerization of styrene and butyl acrylate has been achieved. The polymerizations were initiated by AIBN and BPO, and the generated polymers obtained had molecular weights which were predetermined by the equation, DPn = D(M) / (R' - X)o. The resulting polymers had relatively low polydispersities, Mn/Mw approx. 1.4. This control was achieved by using degenerative transfer of the iodine atom to produce a dynamic equilibrium between dormant and active propagating species. The effects of initiator, temperature, and transfer agent will be presented. jg p.2

Descriptors :   *POLYMERS, *POLYMERIZATION, *STYRENES, *ALKYL RADICALS, *IODIDES, PROPAGATION, REPRINTS, DYNAMICS, MOLECULAR WEIGHT, ATOMS, BUTYL RADICALS, TRANSFER, EQUATIONS, ACRYLATES, CHEMICAL EQUILIBRIUM, DORMANCY.

Subject Categories : Polymer Chemistry
      Inorganic Chemistry
      Organic Chemistry
      Physical Chemistry
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE