Bulletin of the Korean Chemical Society

  • 제25권8호
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  • Pages.1182-1188
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  • 2004
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  • 0253-2964(pISSN)
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  • 1229-5949(eISSN)
대한화학회 (Korean Chemical Society)
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Surface Active Properties and LCST Behavior of Oligo(propylene oxide-block-ethylene oxide) Allyl Ether Siloxane Surfactants in Aqueous Solution

  • Kim, Doo-Won (ShinJin Chem. Ind. Co. Ltd. R&D Center) ;
  • Lim, Chul-Hwan (ShinJin Chem. Ind. Co. Ltd. R&D Center) ;
  • Choi, Jae-Kon (Department of Polymer Science & Engineering, Chosun University) ;
  • Noh, Si-Tae (Department of Chemical Engineering, Hanyang University)
  • 발행 : 2004.08.20
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초록

Polydisperse oligo(PO-b-EO) allyl ether siloxane surfactants were synthesized by the hydrosilylation reaction of OMTS with Allyl-oligo(PO-b-EO) series. The surface tension of siloxane surfactants increased with increasing the EO chain length while it decreased with increasing the PO ratio. However, the sedimentation time of the aqueous solution showed opposite trend to the surface tension data. Both the surface tension and sedimentation time of the aqueous solution containing inorganic electrolyte gradually decreased as the content of inorganic electrolyte increased because of the surface arrangement of surfactant molecules. However, they increased with an increase of pH values due to the hydrolysis of the siloxane backbone. The $C_p$ values tended to increase with the increase in the EO chain length and decrease of the PO ratio. It seems that intermolecular interaction between PO/EO block copolymer and water affects the variation of transition temperature.

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  2. 저분자 유기실리콘 계면활성제의 개발 동향 (제2보) vol.34, pp.3, 2004, https://doi.org/10.12925/jkocs.2017.34.3.461
  3. 비이온성 고분자의 Iodine 착물형성에 대한 계면활성제의 영향 vol.35, pp.4, 2004, https://doi.org/10.12925/jkocs.2018.35.4.1031