P. Bruni et al., INTERACTION BETWEEN TETRACYANOETHYLENE AND HEXAMETHYLBENZENE IN POLYPROPYLENE - EFFECT OF POLYMER MEDIUM, Polymer degradation and stability, 46(2), 1994, pp. 151-158
The formation of a charge-transfer complex between tetracyanoethylene
(TCNE) and hexamethylbenzene (HMB) in isotactic polypropylene (PP) has
been studied by using UV-VIS spectroscopy. The effective equilibrium
constant of complex formation (K-e) increases with the concentration o
f TCNE or HMB in the polymer. Hexadecane affects the K-e in PP, while
it has no influence on the complex in solution. The theory of non-unif
orm additives distribution in the polymer medium and the reactivity ar
e discussed.