Dual and Triple Shape Capability of AB Polymer Networks based on Poly(ε-caprolactone)dimethacrylates

Non-contact actuation of triple-shape effect in multiphase polymer network nanocomposites in alternating magnetic field

“…Samples with 70 wt-% PCLDIMA exhibited no T PCHMA d,max because of the weak mechanical properties at temperatures above 125 C. In addition T PCL d,max associated to the T g,PCL was determined in the range from À69 C to À55 C and the values for the melting transition T PCL E 0 ,inf , analyzed from the inflection point of the storage-modulus (E 0 ), varied from 41 C to 48 C. The obtained thermal properties of the composites networks are in good agreement with the previous reported results for MACL polymer networks. 18,19 Investigation of mechanical properties is necessary to confirm that the materials elastic properties were sufficient for application of the desired TCP. Tensile tests and DMTA measurements were conducted to investigate the impact of the incorporated nanoparticles on the mechanical properties of the MACL polymer matrix.…”

“…The triple-shape capability of a material is quantified by the extent, to which the subsequently memorized shapes B and A are fixed during TCP, represented by strain fixity rates R f (C / B) and R f (B / A), and the extent to which the shapes B and C are recovered, which are quantified by the strain recovery rates R r (A / B) and R r (A / C). 17,19,20 Additional important characteristics are the switching temperatures T sw (A / B) and T sw (B / C), which could be determined as inflection points of the staintemperature recovery curves obtained in cyclic, thermomechanical tensile tests.…”

“…Both T trans,B and T trans,A can either be a T m or a glass transition temperature (T g ). The triple-shape effect (TSE) is achieved by the application of a two-step (TCP-2s) [19][20][21][22] or single-step (TCP-1s) 18 thermomechanical treatment called tripleshape creation procedure (TCP). The triple-shape capability of a material is characterized by the extent to which the subsequently memorized shapes B and C are recovered.…”

“…In Supporting FigureS1‡ the obtained heating curves are displayed. From these curves it is obvious that only MACL(40)C125 and MACL(40)C150 composites reached T max ¼ T high ¼ 150 C, which is necessary to achieve recovery of the original shape for MACL polymer networks [18][19][20]. As MACL(40)C150 exhibited lower values for 3 B compared to MACL(40)C125, a filler content of 12.5 wt-% was chosen for all composites to explore tripleshape properties in alternating magnetic field.…”

A Brief Review of Stimulus-active Polymers Responsive to Thermal, Light, Magnetic, Electric, and Water/Solvent Stimuli

“…When several switches are combined in a single SMP, an SMP with 'multiple SME' can be developed (Bellin et al, 2006(Bellin et al, , 2007Behl et al, 2008;Chen et al, 2009c; Qin . Figure 6 shows the triple SME of a polycaprolactone and polyethylene glycol-based polymer network.…”