Block copolymers of styrene, isoprene, and ethylene oxide prepared by anionic polymerization: I: Synthesis and characterization

D. W. Koetsier*, A. Bantjes, J. Feijen, D. J. Lyman

*Corresponding author for this work

    Research output: Contribution to journalArticleAcademicpeer-review

    17 Citations (Scopus)

    Abstract

    In the reported experimental study, anionic polymerization has been used as a technique for the synthesis of five-block copolymers of polystyrene (PS), polyisoprene (PI), and poly(ethylene oxide) (PEO). Two types of such polymers, PEO-PI-PS-PI-PEO and PEO-PS-PI-PS-PEO with varying PEO block length, have been prepared, using potassium naphthalene as the initiator and tetrahydrofuran as the solvent. The polymers were purified by extraction with ethyl acetate, diethyl ether, and water. After the addition of each monomer, a sample from the living polymer solution was taken and analyzed by spectroscopy (infrared (IR) and proton magnetic resonance (PMR)), osmometry, and gel-permeation chromatography (GPC) to obtain information about composition, molecular weight, and molecular weight distribution of the intermediate polymers. The five-block copolymers have also been characterized by the same techniques and by elemental analysis.

    Original languageEnglish
    Pages (from-to)511-521
    Number of pages11
    JournalJournal of polymer science. Part A: Polymer chemistry
    Volume16
    Issue number2
    DOIs
    Publication statusPublished - 1 Jan 1978

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