Monomer reactivity ratios of styrene-4-vinylpyridine copolymers at low and high conversions

Monomer reactivity ratios in free-radical copolymerization of styrene and 4-vinylpyridine monomers at 80°C in toluene solution under reduced pressure were determined for low and high conversions. Finemann-Ross, Kelen-Tüdös, extended Kelen-Tüdös and Mayo-Lewis methods were used for this purpose. The...

Full description

Saved in:
Bibliographic Details
Published in:Polymer (Guilford) 1993, Vol.34 (1), p.145-149
Main Authors: Yilmaz, Elvan, Küçükyavuz, Zühal
Format: Article
Language:English
Subjects:
4-vinylpyridine
Applied sciences
Copolymerization
Exact sciences and technology
monomer reactivity ratio
Organic polymers
Physicochemistry of polymers
Preparation, kinetics, thermodynamics, mechanism and catalysts
styrene
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:Monomer reactivity ratios in free-radical copolymerization of styrene and 4-vinylpyridine monomers at 80°C in toluene solution under reduced pressure were determined for low and high conversions. Finemann-Ross, Kelen-Tüdös, extended Kelen-Tüdös and Mayo-Lewis methods were used for this purpose. The most reliable method was found to be the extended Kelen-Tüdös method. By the use of this method, for conversions below 20%, monomer reactivity values of 0.700±0.005 and 0.335±0.001 were calculated for 4-vinylpyridine and styrene respectively. For conversions greater than 20%, these values were found to reduce to 0.538±0.004 and 0.277±0.001 respectively.
ISSN:0032-3861
1873-2291
DOI:10.1016/0032-3861(93)90297-N