Photochemical Processes In Polymer Chemistry–2. Invited Lectures Presented At The Second Iupac Symposium On Photochemical Processes In Polymer Chemistry, Leuven, Belgium, 2–4 June, 1976

Organizing Committee Chairman: G. Smets Secretary: F. C. De Schryver Members: G. Delzenne G. Geuskens E. Goethals J. Nasielski Ph. Teyssié A. Van Dormael H. Viehe International Union of Pure and Applied Chemistry (Macromolecular Division) in conjunction with The University of Leuven Photochemical Processes in Polymer Chemistry — 2 Invited lectures presented at the Second IUPAC Symposium on Photochemical Processes in Polymer Chemistry Leuven, Belgium, 2 - 4 June, 1976 Symposium Editor: G. Smets University of Leuven PERGAMON PRESS OXFORD · NEW YORK · TORONTO · SYDNEY · PARIS · FRANKFURT U.K. Pergamon Press Ltd., Headington Hill Hall, Oxford OX3 OBW, England U.S.A. Pergamon Press Inc., Maxwell House, Fairview Park, Elmsford, New York 10523, U.S.A. Pergamon of Canada Ltd., 75 The East Mall, Toronto, Ontario, Canada CANADA AUSTRALIA Pergamon Press (Aust.) Pty. Ltd., 19a Boundary Street, Rushcutters Bay, N.S.W. 2011, Australia FRANCE Pergamon Press SARL, 24 Rue des Ecoles, 75240 Paris, Cedex 05, France WEST GERMANY Pergamon Press GmbH, 6242 Kronberg-Taunus, Pferdstrasse 1, West Germany Copyright © 1977 International Union of Pure and Applied Chemistry A11 Rights Reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted in any form or by any means: electronic, electrostatic, magnetic tape, mechanical, photocopying, recording or otherwise, without permission in writing from the publishers The contents of this book appear in Pure and Applied Chemistry, Vol. 49, No. 4 Library of Congress Catalog Card No. 77-78338 Printed in Great Britain by A. Wheaton & Co., Ltd., Exeter ISBN 0 08 021205 0 Pure & Appi. Chem., Vol. 49, p. 403. Pergamon Press, 1977. Printed in Great Britain. INTRODUCTORY REMARKS On behalf of the Organizing Committee of this symposium I bid our sincere welcome in Leuven to all participants of this second microsymposium on PHOTOCHEMICAL PROCESSES IN POLYMER CHEMISTRY, sponsored by the I.U.P.A.C, and organized at the occasion of the 550th anniversary of our University. The subject of this meeting was intentionally concentrated on photochemical and photophysical processes occuring in polymeric systems, and the Scientific Committee agreed to limit the lec­ tures to be presented in order to allow adequate time for discussion, and for the presentation of related papers. Excepted the opening plenary lecture of Professor TURRO devoted to recent advances in organic photochemistry and the fundamental principles of energy transfer processes in organic molecu­ les all invited lectures are directly concerned with macromolecules. They can be grouped under a few headlines: ^ly^rization_kinetics will be considered by prof. LEDWITH with respect to photo initiation especially by charge transfer processes, by prof. WEGNER concerning solid state polymeriza­ tion, i.e. stepwise four^center type photopolymerization of diolefines and the polymerization of diacetylenes via carbenoids intermediates, and by professor IRIE concerning photoinduced ionic polymerization of different vinyl monomers. PbQtgphysiçal_prgçesses and energy transfer in polymeric systems will constitue the second ge­ neral topic of this meeting. Dr. J. PEARSON will present his lecture on photoconductivity phenomena of high polymers; related problems will be considered by Dr. Zachariasse, Dr. Klopffer and Dr. Soutar. Professor ŒUSKENS will treat essentially energy transfer phenomena including photodegradation; photostability problems which are directly related to this theme will be considered by profes­ sor Rabek and Dr. Balint. Special attention will be given to laser spectroscopic methods in professor FAURE's lecture, as well as in the relat