• Title, Summary, Keyword: hydroxyl-terminated polydimethylsiloxane (OH-PDMS)

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Synthesis of Alkoxy Modified Silicone Using Alkali Catalyst

  • Lee, Kangseok;Shim, Sang Eun
    • Elastomers and Composites
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    • v.51 no.2
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    • pp.99-105
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    • 2016
  • Alkoxy modified silicone (PAMS) was synthesized from hydroxyl-terminated polydimethylsiloxane (OH-PDMS) and vinyltrimethoxysilane (VTMO) under alkali catalyst (NaOH and KOH) at room temperature ($25^{\circ}C$) via condensation polymerization. Then, the structural verification of the synthesized PAMS was confirmed using $^1H$-NMR and FT-IR spectroscopy. The reaction rate of PAMSs was studied in terms of the concentration variation of alkali catalyst. The reaction rate increased with the concentration of alkali catalyst, but no correlation between conversion and concentration of alkali catalyst was observed.

Preparation of PDMS Surface Modifier Using Silane-Functionalized Polymer Precursor Manufacture and Their Properties (실란 기능화 아크릴 고분자 전구체를 이용한 PDMS 표면 개질제 제조 및 표면 물성)

  • Shin, Jae-Hyeon;Kim, Nahae;Kim, Juyoung
    • Journal of Adhesion and Interface
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    • v.19 no.4
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    • pp.154-162
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    • 2018
  • Plasma treatment and corona treatment have been used for surface modification of polydimethylsiloxane (PDMS) film by activating its surface with the -OH group. Adhesion promoter or coupling agent was also used to improve adhesion of PDMS film with various materials. However, obtained hydrophilicity onto the surface of PDMS films with those processes was transient and vulnerable. In this study, a new alkoxysilane-functionalized acrylic polymer precursor was first synthesized by copolymerization process, and then was reacted with HO-terminated PDMS through condensation reaction to prepare a new surface modifier for PDMS film. The structure and molecular weight of the prepared surface modifier were confirmed by 1H-NMR and GPC measurement. Surface properties of surface modifier-coated PDMS films were also investigated by using XPS, ATR and WCA analysis. The adhesion between the PDMS film and the surface modifier was tested using cross-cut test.