Premium
Change of molecular weight distribution of statistical poly(styrene‐co‐acrylonitriles) with compositio of copolymer
Author(s) -
Mencer H. J.,
Gomzi Z.,
Rogošić M.
Publication year - 1995
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760351704
Subject(s) - copolymer , comonomer , acrylonitrile , molar mass distribution , gel permeation chromatography , styrene , materials science , polymer chemistry , intrinsic viscosity , fractionation , analytical chemistry (journal) , chromatography , polymer , chemistry , composite material
Statistical poly(styrene‐co‐acrylonitrile) (SAN) copolymes with varying mole fractions of comonomer units have been synthesized in a batch reactor. The intrinsic viscosity and gel permeation chromatography (GPC) patterns of model copolymer samples were the basic experimental results. Chromatographic patterns of SAN copolymer samples were converted into molecular weight distributions and afterwards fitted to the theoretical distribution functions. The correlation between the composition of copolymers and the best fitted model distribution (Schulz's two parameters distribution in this case) was established. The treatment of data shows that parameter α is inversely proportional to the content of acrylonitrile units in the sample and indicates the molecular weight interval. Parameter b shows the invariability of the molecular weight distribution shape.