1995 Volume 23 Issue 4 Pages 233-236
Izod impact strength is examined in respect of its relation to chemical structures. Entanglement density and the characteristic ratio of the mean square end-to-end distance of a actual polymer against to that of an idealized freely joined chain (C∞) are used, as parameters representing the chemical structure of the polymers. A functional relation is found between the Izod impact strength and the ratio of the entanglement to C∞. A method for predicting the Izod impact strength from the chemical structure of the polymer is reported.