Solution behaviour of a random copolymer of poly(isobutyl methacrylate-t-butylaminoethyl methacrylate): 2. Viscosity and light scattering intensity studies

Random copolymers of poly(isobutyl methacrylate-t-butylaminoethyl methacrylate) with M w ∼ 2.4 × 10 6 g mol −1 could be shown to form more expanded coils in the very dilute solution regime (≲ 10 −5 g ml −1) due to intramolecular repulsion, to associate in most solvents in the dilute solution regime...

Full description

Saved in:
Bibliographic Details
Published in:Polymer 1990-05, Vol.31 (5), p.805-811
Main Authors: Chu, Benjamin, Wang, Jian, Shuely, Wendel J
Format: Article
Language:English
Subjects:
light scattering
random copolymer
solution behaviour
viscosity
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:Random copolymers of poly(isobutyl methacrylate-t-butylaminoethyl methacrylate) with M w ∼ 2.4 × 10 6 g mol −1 could be shown to form more expanded coils in the very dilute solution regime (≲ 10 −5 g ml −1) due to intramolecular repulsion, to associate in most solvents in the dilute solution regime (∼ 10 −4 g ml −1) where inter- and intramolecular interactions are present, and to aggregate further in semidilute/concentrated solution regimes where intermolecular interactions dominate. The formation of larger aggregates in semidilute/concentrated solutions is responsible for its effectiveness as a polymer additive. At the same time, the rheological properties, such as the shear-rate dependence of the viscosity, tend to become more sensitive to concentration and temperature variations.
ISSN:0032-3861
1873-2291
DOI:10.1016/0032-3861(90)90038-Z