Effect of the addition of diurethane dimethacrylate on the chemical and mechanical properties of tBA-PEGDMA acrylate based shape memory polymer network

J Mech Behav Biomed Mater. 2020 Oct:110:103951. doi: 10.1016/j.jmbbm.2020.103951. Epub 2020 Jul 3.

Abstract

There is a great demand for the synthesis of acrylate based thermoset shape memory polymer (SMP) associated with one monomer and one crosslinker such as tert-butyl acrylate (t-BA) with poly (ethylene glycol) dimethacrylate (PEGDMA). The present work describes the synthesis of a new thermoset SMP wherein a second monomer such as diurethane dimethacrylate (DUDMA) has been added to the existing tBA + PEGDMA SMP matrix. The synthesized thermoset shape memory polymer exhibited a glass transition temperature (Tg) of 55 °C, higher Young's Modulus of 3.23 GPa, transmittance of 95% and 100% shape recovery. The SMP exhibited response to both thermal and chemical stimuli. The shape recovery rate of the SMP network is 20 s compared to 24 s observed for SMP based on tBA + PEGDMA. The obtained SMP is very transparent and possesses higher stiffness (8 MPa) and hence may be suitable for biomedical shape memory lens and orthopedic application.

Keywords: Diurethane dimethacrylate; Transparent; Young's modulus.

MeSH terms

  • Acrylates
  • Materials Testing
  • Methacrylates
  • Polyethylene Glycols
  • Smart Materials*
  • Urethane / analogs & derivatives

Substances

  • Acrylates
  • Methacrylates
  • Smart Materials
  • diurethane dimethacrylate
  • poly(ethylene glycol)-dimethacrylate
  • Urethane
  • Polyethylene Glycols