Abstract
L'etude par TGA du homopolymere montre l'existence de 2 stades de degradation thermique: entre 120 et 200°C, il y a elimination d'acide phenylsulfenique, puis a temperature plus elevee, la degradation du polyacetylene forme. L'evolution de l'acide phenylsulfenique forme est etudiee par pyrolyse couplee a la spectrometrie de masse. La conductivite electrique faible du polyacetylene montre qu'il est faiblement conjugue
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