Article

Correlation between Functionated Structure and Nanomechanical Property Profiles of Silsesquioxane Films and Bulks

  1. Lijiang Hu*,
  2. Di Wang,
  3. Zushun Lu,
  4. Yanwei Song,
  5. Changmei Song

Article first published online: 11 JUL 2008

DOI: 10.1002/masy.200850714

Issue

Macromolecular Symposia

Macromolecular Symposia

Special Issue: Nanostructured Polymers and Polymer Nanocomposites

Volume 267, Issue 1, pages 79–84, June 2008

Additional Information

How to Cite

Hu, L., Wang, D., Lu, Z., Song, Y. and Song, C. (2008), Correlation between Functionated Structure and Nanomechanical Property Profiles of Silsesquioxane Films and Bulks. Macromol. Symp., 267: 79–84. doi: 10.1002/masy.200850714

Author Information

  1. Department of Applied Chemistry, Harbin Institute of Technology, Box 713, Harbin 150001, China

*Department of Applied Chemistry, Harbin Institute of Technology, Box 713, Harbin 150001, China.

Publication History

  1. Issue published online: 11 JUL 2008
  2. Article first published online: 11 JUL 2008

Funded by

  • Department of Science and Technology of the Government of Heilongjiang Province. Grant Numbers: GB04A204, ZJG0506-02

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Keywords:

  • elastic modulus;
  • hardness;
  • harmonic contact stiffness;
  • nanoindentation;
  • silsesquioxane;
  • thin film and bulk

Abstract

Three silsesquioxane (SSO) building blocks based on [3-(methacryloxy)propyl]trimethoxysilane (MPMS), [(3-glycidoxy)propyl] trimethoxysilane (GPMS), (vinyl)trimethoxysilane (VMS) and modified with 15 wt-% tetraethoxysilane (TEOS) were prepared using hydrolytic condensation. The hardness, elastic modulus and harmonic contact stiffness for three films [f-MTSSO (film-MPMS-TEOS-SSO), f-GTSSO and f-VTSSO] and bulks (b-MTSSO, b-GTSSO and b-VTSSO) derived from the three SSOs were tested by instrument-indentation testing. Different profiles of nanomechanical properties of the films can be attributed to a different functionality and the functionated structure of the different SSOs. The f-MTSSO shows better mechanical properties which are higher than the other two films containing more OH or OCH3 groups. For the f-GTSSO with a bulky organic substituent, the unsatisfactory properties resulting from ring opening during hydrolytic condensation and an incomplete crosslinking network are discussed. However, the nanomechanical properties of the three bulks are very different from the corresponding nanomechanical properties of their films: b-VTSSO possesses the best nanomechanical properties (note: not b-MTSSO) among three bulks due to the differences in reaction conditions and chain less flexibility which are also discussed.

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