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Book Review Polymer NetworksЧStructural and Mechanical Properties. By A. J. Chompff and S. Newman

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membered rings. The other examples deal with syntheses of
products containing five-membered (three cases), sixmembered (two cases), and eight-membered rings (one
case), four isomerizations without ring formation in the
end product, three oxidations. and one aromatic substitution.
The arrangement into structural formulas, authors, “Procedure”, “Notes”, “Methods of Preparation”, and “Merits
of the Preparation” in many cases enables the reader to
find information that is not contained in the original
publications. The concluding “References” cannot give
complete coverage of the literature, which is unfortunate.
since a complete collection of all the procedures published
so far (e.g. including H . M . Fvey, J. Chem. SOC.1964, 365,
for the synthesis of quadricyclane) could be particularly
useful to the non-photochemist, as the equipment listed in
the examples in the volume may be unavailable in many
It is to be hoped that further photochemists will be prepared to help with the later volumes, and that the selection
of the examples will be based mainly on preparative considerations. “Organic Photochemical Syntheses” will then
prove useful both in practical instruction and in research,
and should be available in any library where these aspects
are important.
Gerd Kaupp
[NB 65 IE]
Polymer Network-tructural
and Mechanical Properties.
By A . J . Chompf and S. Newman. Plenum Press, New
York-London 1971. 1st Edit., xiv, 493 pp., numerous
figures, bound $ 31.50.
The book contains 22 papers presented at a Symposium of
the American Chemical Society in Chicago in September
1970 by distinguished scientists such as P.J . Blatz, K.
Duiek, M.Gordon, R. F.Lande1, W .Prim, and M . L .
Williams on the subject of “Highly Crosslinked Polymer
Networks”. The discussions are appended to the papers.
The first ten papers are concerned with the network as a
continuum. They deal with the kinetics of the crosslinking
processes, the macrothermodynamics and the microstatic
mechanics of networks, and the influence of the network
structure and intermolecular forces on the glass transition
temperature and the mechanical properties. The next
twelve papers deal with the particularly important question
of the inhomogeneities and heterogeneities of networks in
a wide variety of forms. Four papers discuss the methods
for the characterization of such networks by means of
birefringence and light scattering. The importance of the
microstructure to swelling and to the stress-strain behavior
up to breakage is finally discussed in several papers.
The proceedings of the ACS Symposium d o not have the
character of a textbook with the integrated form of a
monograph. Their main significance is the topicality
of the various contributions. The book, a remarkable
review of the most important developments in the field of
crosslinked polymers, includes many results of recent
research and provides an excellent supplement to former
publications, e. g. to those by Kuhn, by Peloar and Duiek,
and by Prins. Chemists, physicists and engineers with the
necessary background find up-to-date information of
research and development in the field of crosslinked
Dieter ffeinze [NB 66 IEJ
Angew. Chem. internal. Edit. / Vol. 11 11972) / N o . 9
Organic Peroxides. Vol. 2. By D. Swern. Wiley-Interscience, New York-London 1971. 1st Edit., ix, 963 pp.,
numerous figures and tables, bound .€ 19.00.
The new volume of Swern’s work has followed the first“]
in a gratifyingly short time. Of the eight chapters in the
volume, those by Maiv and Hall: “Determination of
organic peroxides by physical, chemical, and colorimetric
methods” and by Silhert : “Physical properties of peroxides” deserve special mention because of their general
interest, particularly since there were no similar modern
reviews of these fields.
However, the other chapters (Hiaft: Hydroperoxides,
Sosnovsky and Rawlinson : The chemistry of hydroperoxides in the presence of metal ions, Sosnousky: Metal-ion
catalyzed reactions of hydrogen peroxide and peroxydisulfate, Dauies : Formation of organometallic peroxides
by autoxidation, Swevn: Organic peroxy acids as oxidizing
agents. Epoxidation, and Hiart: Acyl peroxides) are also
valuable and exhaustive monographs on these fields,
which are of great interest in part even to the inorganic
chemist. Lavish use has been made of figures and tables
throughout. An example is provided by a list of all expoxidations carried out since 1952, amounting to about 1600,
arranged according to the peracid used. The total of almost
4000 references evaluated and the 32-page subject index
also testify to the diligence of the authors and of the
This work, which is practically free from errors and excellent in its presentation, is a necessity for any library. I t .is
with keen anticipation that we look forward to the third
and final volume.
Rudo!f Criegee
[NB 68 IE]
Crystal Chemistry and Semiconduction. By .I
Academic Press. New York-London
1971. 1st Edit.,
xvii, 380 pp., numerous figures, bound $22.--.
The book was written to provide scientists working on
semiconductors in university polytechnics and in industry
withasurvey ofthedevelopment s o f t he past 20yearsand of
the present research position in the difficult field of semiconducting binary compounds of the transition metals, the
lanthanoids and the actinoids. The author is a chemist, and
he can thus appreciate the great variety of the compounds
investigated and their properties, and present the material
in an orderly fashion.
The first 80 pages are spent in laying the theoretical foundations for the description of the bonding in crystals. In
earlier years the author built up a classification that is
partly his own, and this forms the basis of the book. The
language is thus defined, and the reader is then in a position to translate a described situation into concepts with
which he is familiar.
In the second part of the book (200 pages), the relationships between crystal structure, chemical bonding. and
physical properties are discussed. The presentation intentionally avoids what the author, with some justification.
calls the often “esoteric” tendencies of solid-state physicists.
There are frequent hints of the author’s own experience
and of his familiarity with experimental work. The treatment of the compounds with IIIB, IVB, and VB elements
is fairly short (45 pages); this is a reflection of the large
amount of investigation that still remains to be carried out
on these compounds. Considerable space (80 pages) is
devoted to the oxides, while the chalcogenides occupy 50
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