Preparation and characterisation of aggregating comblike poly(propylene oxide)

Research output: Contribution to journalArticle

Abstract

Poly(propylene oxide)s with a comblike architecture were prepared by using an ethylene-vinyl alcohol copolymer as a macroinitiator for anionic graft polymerisation of propylene oxide. The densely grafted polymers were subsequently modified by capping the terminal hydroxyl groups with hexadecanoyl chloride to produce aggregating polymers. Dilute solution viscometry showed that the hydroxyl and hexadecanoyl content of the uncapped and capped polymers, respectively, largely determined their state of aggregation in methanol and toluene. Thermal analysis of the uncapped polymers in the solid state showed a decrease in glass transition temperature with increasing average molecular weight of the grafts. Analysis of the capped polymers revealed crystallisation and melting of the hexadecanoyl chain ends in connection with the glass transition of the poly(propylene oxide) phase. It is conceivable that in the solid state the comblike poly(propylene oxide) chains were interconnected by 'micellar-like' microdomains formed by the hexadecanoyl chain ends.

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Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Chemical Sciences

Keywords

  • Graft copolymerisation, Comb polymers, Propylene oxide
Original languageEnglish
Pages (from-to)6701-6707
JournalPolymer
Volume41
Issue number18
Publication statusPublished - 2000
Publication categoryResearch
Peer-reviewedYes

Bibliographic note

The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Polymer and Materials Chemistry (LTH) (011001041)