Number: 2003-019-2-400
Title: Definitions of terms relating
to crystalline polymers - revision of IUPAC Recommendations 1988
Task Group
Chairman: Giuseppe
Allegra
Members: D.C.
Bassett, J. Blackwell,
P. Geil, J.
He, M. Hess, Jung-Il
Jin, B. Lotz,
S.V. Meille, W.
Mormann, C.K. Ober,
R.F.T. Stepto, J.
Vohlidal and W.J.
Work
Objective:
To update the previous IUPAC Document by 1) accounting for new experimental
results, 2) integrating crystallographic, conformational and morphological
terminology relating to polymers and providing new, significant
examples, 3) harmonising with other documents of the Subcommittee
on Macromolecular Terminology.
> for a
copy of the original document, see
chapter 4 in the so-called purple book
Description:
The proposed revision will be based on the following points:
1 - In view of the rapid development and
widespread application of the experimental techniques, explicit
reference will be made to results from solid-state NMR, AFM, electron
microscopy and diffraction, SANS and SAXS, FT-IR and Raman spectroscopy
etc., whenever appropriate.
2 - Further examples will be given, especially
those that correlate morphology with local conformation of the polymer
chains.
3 - Reference will be made to biological
macromolecules that crystallise as non-globular chains.
4 - Some definitions relating to chirality
of biological macromolecules and to stereoregularity of synthetic
polymers will be compared and harmonised.
5 - Definitions of terms belonging to
general physical chemistry, such as crystal, unit cell etc. will
be avoided as much as possible.
6 - Disorder in crystalline polymers will
be covered. Some choices are required, such as whether or not to
mention the so-called two-phase model and to deal with the issue
of static vs dynamic disorder.
7 - Wider reference to and fuller integration
with other documents of the Subcommittee on Macromolecular Terminology
will be attempted, especially with regard to the Liquid Crystal
Document, the Glossary of Basic Terms and the Polymer Solutions
Document.
