Synthèse et étude des propriétés rhéologiques de polyesters stéréoréguliers à base d'acide maléique et d'acide fumarique

Abstract

Abstract Pure poly(butylene maleate) and poly(butylene fumarate) of high molecular weights were synthesized by reaction of the corresponding caesium and potassium dicarboxylates with 1,4‐dibromobutane in 1‐methyl‐2‐pyrrolidone at 110°C. During the reaction a substantial amount of oligomeric products, consisting mainly of cyclic compounds, is formed. From the study of the rheological properties at high temperatures (175 to 240°C) it was concluded that some crosslinking occurs rather than isomerization.