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Solution properties of methyl methacrylate–acrylonitrile copolymers
Author(s) -
Asaduzzaman A. K. M.,
Rakshit A. K.,
Devi Surekha
Publication year - 1993
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1993.070471012
Subject(s) - copolymer , acrylonitrile , polymer chemistry , materials science , viscosity , refractometry , methyl methacrylate , swelling , intrinsic viscosity , methacrylate , chemical engineering , composite material , polymer , refractive index , optoelectronics , engineering
Characterization of methyl methacrylate‐acrylonitrile copolymers is done through viscosity, swelling, and differential refractometric studies. Viscosities of the copolymers and homopolymers were determined at 30, 40, and 50°C. The activation parameters of viscous flow, voluminosity, and shape factor were also calculated. The average shape factor was observed to be 2.5 ± 0.005 for all copolymer systems. Viscosity molecular weights were calculated, and from intramolecular expansion factor (α), it was observed that copolymers are less flexible than are homopolymers. dn / dc values obtained from differential refractometry are in good agreement with those calculated theoretically. © 1993 John Wiley & Sons, Inc.