CRYSTALLIZATION OF POLY(ETHYLENE OXIDE) CONFINED IN PORES OF ACTIVE-CARBON

The kinetics of isothermal crystallization of poly(ethylene oxide) con fined in pores of active carbon was studied by nuclear magnetic resona nce relaxation, At equal temperatures the induction period of crystall ization in pores differs from that in :the bulk polymer. A model was d eveloped that allows estimation of the effect of porous media on the s tatistical sum of the macromolecule considering the change of the poly mer chain conformation in the melt. This model describes the following observed effects: invariability of the induction period temperature d ependence in pores, the weak temperature dependence of the ratio of in duction period for e bulk, and pore material. The change in the induct ion period in cylindrical pores was predicted with satisfactory precis ion, (C) 1998 Elsevier Science Inc.