| abstract |
(57) [Summary] [PROBLEMS] For a carrier for immobilizing microorganisms which can significantly increase the amount of microorganisms retained, is not degraded or decomposed by microorganisms, has high mechanical strength, and is harmless to the natural environment. An oligomer is provided. A main skeleton portion of a polyalkylene glycol; Between the polymerizable double bond group located at both ends of the main skeleton, Elongate the main chain with a urethane bond and ethyleneoxy or a sub-skeleton part consisting of a urethane bond and ethyleneoxy and propyleneoxy, and increase the strength and abrasion resistance in addition to flexibility by networking with urethane bonds On the other hand, ethyleneoxy was bonded to alleviate the hydrophobicity of the urethane portion to improve the familiarity with microorganisms. |