Jump to main content
Jump to site search

Issue 44, 2017
Previous Article Next Article

Toward the low actuation temperature of flexible shape memory polymer composites with room temperature deformability via induced plasticizing effect

Author affiliations

Abstract

Semi-crystalline/elastomer blends such as poly(lactic acid) (PLA) and thermoplastic polyurethane (TPU) have been well-studied as shape memory polymer (SMP) systems over the last decade. The SMP system is known to be reliable as the activation or transitional temperature (Ttrans) is well defined by its glass transition temperature (Tg). In this study, the possibility of altering SMPs’ Ttrans by introducing plasticizer molecules, such as poly(ethylene glycol) (PEG), into the system was investigated. Significant changes in morphologies and thermal behaviours of the composites after the incorporation of plasticizer inferring the possible changes in shape memory behaviours were reported. It was concluded that the SMP performance, in terms of activation temperature, shape fixing (Rf), shape recovery (Rr) ratio, and recovery time, could be improved significantly due to the induced plasticizing effects. With only the incorporation of 5 wt% PEG, the Ttrans of PLA/TPU SMP was successfully decreased from the well-known 75 °C to 50 °C while achieving 85% Rr ratio. An improvement in 37.5% shorter recovery time can be observed with the incorporation of 10 wt% PEG when compared with a pristine PLA/TPU system under 50 °C. The results indicated that plasticizing is an effective method for altering the polymer chain structures and a step closer toward the development of fast response SMPs that can be activated under a low temperature.

Graphical abstract: Toward the low actuation temperature of flexible shape memory polymer composites with room temperature deformability via induced plasticizing effect

Back to tab navigation

Supplementary files

Publication details

The article was received on 01 Aug 2017, accepted on 14 Oct 2017 and first published on 14 Oct 2017


Article type: Paper
DOI: 10.1039/C7TB02068F
Citation: J. Mater. Chem. B, 2017,5, 8845-8853
  •   Request permissions

    Toward the low actuation temperature of flexible shape memory polymer composites with room temperature deformability via induced plasticizing effect

    S. Cai, Y. Sun, J. Ren and H. E. Naguib, J. Mater. Chem. B, 2017, 5, 8845
    DOI: 10.1039/C7TB02068F

Search articles by author

Spotlight

Advertisements