Accession Number:

ADA126908

Title:

The Molecular Weight Distribution for Molecules Requiring Rotational Diffusion Prior to Reaction.

Descriptive Note:

Technical rept.,

Corporate Author:

MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF MATERIALS SCIENCE AND ENGINEERING

Personal Author(s):

Report Date:

1982-10-01

Pagination or Media Count:

18.0

Abstract:

In 1939 Flory announced the principle of equal reactivity of polymer chains. The principle maintains that the ability of a chain molecule to form larger molecules is independent of the chain length. The argument was very significant at that time for two reasons First, the existence of high molecular polymers was considered by some to be improbable. These proponents argued that the high molecular weight species must have a higher diffusion constant, relative to the lower molecular weight species, which would eventually limit the extent of polymerization. Studies on condensation-type polymers with random coils demonstrated the general validity of the principle of equal reactivity. The second significant result was that the distribution of molecular weights could be readily calculated from kinetic parameters that were independent of chain length.

Subject Categories:

  • Nuclear Physics and Elementary Particle Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE