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2005-04-01 - Article/Dans un journal avec peer-review - Anglais - 8 page(s)

Raquez Jean Marie , Degée Philippe, Dubois Philippe , Balakrishnan Sunder, Narayan R., "Melt-stable poly(1,4-dioxan-2-one) (co)polymers by ring-opening polymerization via continuous reactive extrusion" in Polymer Engineering & Science, 45, 4, 622-629

  • Edition : John Wiley & Sons, Inc. - Engineering
  • Codes CREF : Chimie macromoléculaire (DI1315), Catalyses hétérogène et homogène (DI1334)
  • Unités de recherche UMONS : Matériaux Polymères et Composites (S816)
  • Instituts UMONS : Institut de Recherche en Science et Ingénierie des Matériaux (Matériaux)
Texte intégral :

Abstract(s) :

(Anglais) Bulk polymerization of ?-caprolactone (CL), 1,4-dioxan-2-one (PDX), and mixtures of PDX and CL was carried out by initiation with Al(OsecBu)3 in a co-rotating twin-screw extruder through a fast single-step process. Both homopolymerizations and copolymerization of PDX and CL proceed very rapidly and reach almost complete (co)- monomer(s) conversion as soon as 8 mol% of CL are added in the feed. Even though poly(1,4-dioxan-2-one) (PPDX) is known to thermally degrade mainly through unzipping depolymerization promoted from the hydroxyl end-groups and yielding PDX monomer, it turns out that the thermal stability of PPDX chains is substantially improved by the copolymerization of PDX with limited amounts of CL. Interestingly, DSC analysis of the so-obtained P(PDX-co-CL) copolymers has demonstrated that a CL molar fraction as high as 11 mol% does not prevent the crystallization of the resulting copolymer, which retains a melting temperature close to 95°C. This last observation has been explained by the formation of a blocky-like copolymer structure, in which short PPDX and PCL sequences are randomly distributed. POLYM. ENG. SCI., 45:622–629, 2005. © 2005 Society of Plastics Engineers.

Notes :
  • (Anglais) Lecture en ligne: http://onlinelibrary.wiley.com/doi/10.1002/pen.20312/pdf
  • (Anglais) Publié en ligne le 4 mars 2005
Identifiants :
  • DOI : 10.1002/pen.20312