On the effects of threshold concentration in polymer solutions

Light scattering by PS fractions ( M w =(1–300)×10 4) in benzene and of 1-bromo-naphthalene in chloroform have been measured down to critical dilutions. The existence of a threshold concentration c 0 has been established below which there are no intermolecular reactions to be found in the solution....

Full description

Saved in:
Bibliographic Details
Published in:Polymer science USSR 1977, Vol.19 (3), p.612-616
Main Authors: Eskin, V.Ye, Baranovskaya, I.A.
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Light scattering by PS fractions ( M w =(1–300)×10 4) in benzene and of 1-bromo-naphthalene in chloroform have been measured down to critical dilutions. The existence of a threshold concentration c 0 has been established below which there are no intermolecular reactions to be found in the solution. The c 0≈ M −1 in the range M w ⩽2×10 5; this does not occur at larger M because of a deviation from the Gaussian coil statistics (larger swelling coefficient α). Intermolecular reactions do not take place in the solution when the distance between the coils is 3 times larger than the average radius of the forces active between them. In case of high and low mol.wt. substances this phenomenon is governed by the same mechanisms.
ISSN:0032-3950
1878-268X
DOI:10.1016/0032-3950(77)90117-4