Jr. Gonzalezvelasco et al., EFFECT OF MOLECULAR-WEIGHT AND PRESENCE OF ANTIOXIDANT IN THERMOOXIDATIVE DEGRADATION OF POLY(2-HEXYNE) FILMS, Chemical Engineering Science, 51(11), 1996, pp. 2811-2816
Some interesting polyacetylenes present unstable behaviour because of
their reactivity with oxygen, among them, poly(2-hexyne). This paper i
s a continuation of a previous work, where models for oxidation and ch
ain scission processes of this polymer were proposed. Here, the model
of oxidation has been applied to a sample of poly(2-hexyne) with diffe
rent molecular weight, to examine its effect on the parameters of the
model, including the activation energy of oxidation and volatilization
processes. The effect of a radical scavenger (N-phenyl-alpha-naphtyla
mine) on poly(2-hexyne) stabilization has also been examined. A modifi
ed model of oxidation including this effect and an equation to predict
the lifetime of poly(2-hexyne) films with antioxidant have been propo
sed.