Journal
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
Volume 43, Issue 1, Pages 188-202Publisher
WILEY
DOI: 10.1002/pola.20483
Keywords
block copolymers; poly(ether ketones); cationic polymerization; phase separation; SAXS
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Telechelic poly(ether ketone)s (PEKs) and polyisobutylenes (PIBs) were combined to form PIB-PEK-PIB triblock copolymers and (PIB-PEK)(n) multiblock copolymers via the formation of urea linkages. Monovalent and bivalent amino telechelic PIBs were prepared quantitatively from allyl telechelic PIBs by a newly developed reaction sequence featuring nucleophilic reaction steps. Telechelic PEK-NCO polymers were prepared from the corresponding amino telechelic PEKs via a reaction with diphosgene. The highly reactive PEK-NCO and PIB-NH2 telechelics formed PEK-PIB block copolymers only quantitatively when appropriately reactive primary amino groups were present on the amino telechelic PIBs. The obtained block copolymers were microphase-separated and featured mostly lamellar structures, as determined by small-angle X-ray scattering (SAXS). Temperature-dependent SAXS measurements revealed ordered polymers in the melt up to 210degreesC. (C) 2004 Wiley Periodicals, Inc.
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