The effect of the glass transition temperature on the toughness of photopolymerizable (meth)acrylate networks under physiological conditions.

Published

Journal Article

The purpose of this study is to evaluate how the toughness of photopolymerizable (meth)acrylate networks is influenced by physiological conditions. By utilizing two ternary (meth)acrylate networks, MA-co-MMA-co-PEGDMA and 2HEMA-co-BMA-co-PEGDMA, relationships between glass transition temperature (T(g)), water content and state, and toughness were studied by varying the weight ratio of the linear monomers (MA to MMA or 2HEMA to BMA). Differential scanning calorimetry and thermogravimetric analysis were performed to evaluate the thermal behavior and water content as a function of either MA or 2HEMA concentration while tensile strain-to-failure tests were performed at 37°C to determine network toughness. Both networks exhibited a maximum in toughness in PBS in the composition corresponding to a T(g) close to the testing temperature. This toughness maximum was achieved by adjusting the glass transition temperature and/or hydrophilicity through changes in chemistry. These relationships may be utilized to design tough photopolymerizable networks for use in mechanically rigorous biomedical applications.

Full Text

Duke Authors

Cited Authors

  • Smith, KE; Sawicki, S; Hyjek, MA; Downey, S; Gall, K

Published Date

  • October 2009

Published In

Volume / Issue

  • 50 / 21

Start / End Page

  • 5112 - 5123

PubMed ID

  • 21709775

Pubmed Central ID

  • 21709775

Electronic International Standard Serial Number (EISSN)

  • 1873-2291

International Standard Serial Number (ISSN)

  • 0032-3861

Digital Object Identifier (DOI)

  • 10.1016/j.polymer.2009.08.040

Language

  • eng