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.

Report Date:

1995-06-30

Pagination or Media Count:

4.0

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 DM R - Xo. The resulting polymers had relatively low polydispersities, MnMw 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