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Journal of Sol-Gel Science and Technology

, Volume 88, Issue 3, pp 660–670 | Cite as

Preparation and characterization of stable DQ silicone polymer sols

  • Ryohei Hayami
  • Izumi Nishikawa
  • Takayuki Hisa
  • Hiroaki Nakashima
  • Yohei Sato
  • Yuzuko Ideno
  • Takuya Sagawa
  • Satoru Tsukada
  • Kazuki Yamamoto
  • Takahiro Gunji
Original Paper: Sol–gel, hybrids, and solution chemistries
  • 72 Downloads

Abstract

Stable DQ silicone polymer sols composed of di (D)- and tetra (Q)-functional alkoxysilanes were prepared by the following methods: (i) co-hydrolysis–condensation between diethoxy(dimethyl)silane (DEDMS) and tetraethoxysilane (TEOS) (DEDMS–TEOS as random copolymer sols), (ii) co-hydrolysis–condensation between poly(dimethylsiloxane) (PDMS) and TEOS (PDMS–TEOS as random block copolymer sol), and (iii) triethoxysilylation of a PDMS-lithium salt (PDMS–TES). The polymer sols were characterized by GPC, NMR, and FT-IR. The differences in properties between the structures were analyzed from their thermal stabilities and by using the swelling test. Thermal stabilities of these polymer sols were increased with the increase in the chain length of the D domain and with decrease in hydrolyzability. The swelling of films via polymer sols was decreased with the increase in the degree of crosslinking in sols.

DQ silicone polymer sols were prepared by three different methods and characterized by NMR, FT-IR, and GPC. The thermal stabilities of these sols were increased with the increase of the chain-length of D unit and hydrolysis resistance. Also, the solvent uptake was increased with the decrease of the degree of crosslinking in sols

Highlights

  • DQ silicone sols with different content and length of D units were prepared by using two methods.

  • Triethoxysiloxyl-terminated PDMS of higher molecular weight was prepared.

  • The structures of these polymer sols were characterized by 29Si NMR spectra.

  • The differences in properties of the structures were evaluated from their thermal stabilities and by using the swelling test.

Keywords

DQ silicone polymers NMR spectra Sols Sol–gel reaction 

Notes

Acknowledgements

This work was supported by a Grant-in-Aid for Scientific Research on Innovative Areas “New Polymeric Materials Based on Element-Blocks” (No. 2401) (JSPS KAKENHI Grant Number JP24102008). This work was also supported by JSPS KAKENHI Grant Number JP16K17951.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Supplementary material

10971_2018_4839_MOESM1_ESM.docx (5.8 mb)
Supporting Information

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • Ryohei Hayami
    • 1
  • Izumi Nishikawa
    • 1
  • Takayuki Hisa
    • 1
  • Hiroaki Nakashima
    • 1
  • Yohei Sato
    • 1
  • Yuzuko Ideno
    • 1
  • Takuya Sagawa
    • 1
  • Satoru Tsukada
    • 2
  • Kazuki Yamamoto
    • 1
  • Takahiro Gunji
    • 1
  1. 1.Department of Pure and Applied Chemistry, Faculty of Science and TechnologyTokyo University of ScienceChibaJapan
  2. 2.Advanced Automotive Research Collaborative Laboratory, Graduate School of EngineeringHiroshima UniversityHiroshimaJapan

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