Block copolymer of 2‐methyl‐2‐oxazoline with silica gel an organic‐inorganic hybrid polymer

Yoshiki Chujo, Eiji Ihara, Shigeo Kure, Keisuke Suzuki, Takeo Saegusa

Research output: Contribution to journalArticlepeer-review

57 Citations (Scopus)


Ring‐opening polymerization of 2‐methyl‐2‐oxazoline followed by termination with 3‐aminopropyltriethoxysilane produced poly(N‐acetylethylenimine) (polyoxazoline) (POZO) having a terminal triethoxysilyl group. Triethoxysilyl‐terminated telechelic POZO was also prepared by using bifunctional initiators. These silane coupling POZOs were subjected to reaction with silanol groups at the surface of silica gel to modify its surface hydrophilicity. Triethoxysilyl‐terminated POZOs were also subjected to acid‐catalyzed co‐hydrolysis polymerization with tetraethoxysilane by the so‐called sol‐gel method to produce a novel organic‐inorganic hybrid polymer (block copolymer). The hybrid obtained was a homogeneous, transparent, glassy composite material, which showed more hydrophilicity in comparison with that of silica gel without POZO segments. On the other hand, a hybrid polymer consisting of poly(2‐ethyl‐2‐oxazoline) and silica gel showed amphiphilic properties absorbing both water and organic solvents. Pyrolysis of these hybrids at 600°C produced silica having micro‐pores.

Original languageEnglish
Pages (from-to)303-312
Number of pages10
JournalMakromolekulare Chemie. Macromolecular Symposia
Issue number1
Publication statusPublished - 1991 Mar
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry


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