Amphiphilic telechelics incorporating polyhedral oligosilsesquioxane: 1. Synthesis and characterization

Byoung Suhk Kim, Patrick T. Mather

Research output: Contribution to journalArticlepeer-review

155 Scopus citations

Abstract

Well-defined amphiphilic telechelics incorporating polyhedral oligosilsesquioxane (POSS) were synthesized by direct urethane linkage between the diol end groups of poly(ethylene glycol) (PEG) homopolymers and the monoisocyanate group of POSS macromers. The hydrophobicity of the amphiphilic telechelics was varied by using a series of PEG homopolymers of increasing molecular weight, resulting in control over molecular architecture by hydrophilic/hydrophobic balance. The synthesized amphiphilic telechelics were characterized by 1H NMR, FT-IR, GPC, DSC, and TGA, showed a relatively narrow and unimodal molecular weight distribution (Mw/Mn <1.1) that had close to2.0 end groups per PEG chain, and revealed strongly modified thermal behavior. Amphiphilic telechelics with POSS contents of 19.8, 23.6, 40.7, 52.7, and 68.1% depending on the molecular weights of PEG homopolymers could be obtained. Modification to crystallization behavior is observed and attributed to the bulkiness of POSS groups with respect to crystalline lamellae dimensions.

Original languageEnglish (US)
Pages (from-to)8378-8384
Number of pages7
JournalMacromolecules
Volume35
Issue number22
DOIs
StatePublished - Oct 22 2002

ASJC Scopus subject areas

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

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