Structural and Mechanical Properties of Supramolecular Polyethylenes

Jérémie Lacombe, Samuel Pearson, Franz Pirolt, Sébastien Norsic, Franck D'Agosto, Christophe Boisson, Corinne Soulié-Ziakovic*

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

Thymine (Thy) or 2,6-diamino-1,3,5-triazine (DAT) end-groups were efficiently installed on well-defined polyethylenes (PEs) synthesized by catalyzed chain growth (CCG) polymerization. Mono- and bifunctional low-molar mass PEs (1200-1500 g·mol-1) formed lamellar morphologies with long-range order upon cooling from the melt due to microphase segregation of polar supramolecular units and apolar PE chains. Crystallization of Thy functions into rigid planes at 180 °C induced very long-range lamellar order in Thy-functionalized PEs and dramatically suppressed PE crystallization (from 67% to 19%). DAT-functionalized PEs, whose end-groups do not crystallize, showed slightly reduced PE crystallinity (62%) and less long-range order, since assembly was instead driven by PE crystallization. Mechanical analysis of the bifunctional PEs demonstrated high moduli roughly proportional to PE crystallinity but low strains at break due to the absence of chain entanglements and/or tie chains between crystalline lamellae. This work offers important insights for designing supramolecular systems with tunable thermal and mechanical properties.

Original languageEnglish
Pages (from-to)2630-2640
Number of pages11
JournalMacromolecules
Volume51
Issue number7
DOIs
Publication statusPublished - 10 Apr 2018

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

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