Pure c Appi. Chem., Vol.53, pp.1479—1487. 0033—4545/81/081479—09$02.OO/O Printed in Great Britain. Pergamon Press Ltd. ©1981 LIJPAC CAN PERCOLATION ThEORY BE APPLIED tO CRITICAL PHENOMENA AT GEL POINTS?

Abstract- A review is given on controversial gelation problems very close to the sol-gel transition. For several quantities the concept of critical exponents like and y is introduced. For example, the gel fraction vani— shes as c and the weight-average degree of polymerization diverges as where c is the small distance from the gel point. Classical theory (Flory, Stockmayer, Gordon,...) predicts =y=1 whereas recent percolation theories give =O.4, y=1.7. Who is right