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Relation between intrinsic viscosity and molecular weight
Author(s) -
Quackenbos H. M.
Publication year - 1980
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.1980.070250717
Subject(s) - intrinsic viscosity , viscosity , molar mass distribution , polystyrene , thermodynamics , materials science , molecular mass , measure (data warehouse) , chemistry , polymer , physics , organic chemistry , composite material , database , computer science , enzyme
The connection between intrinsic viscosity and number‐average and weight‐average molecular weight has been revealed by calculations from distribution curves. Log‐normal distributions, and moderate variations thereon, were chosen as typical for polystyrene and other thermoplastics. Intrinsic viscosity and number‐average molecular weight are unlikely to be related because of the highly disturbing effect of small variations in molecular weight distribution. Conversely, intrinsic viscosity is a good practical measure of weight‐average molecular weight up to a ratio of 10 for weight‐to‐number average.