'Pi of the Sky' project studies rapidly-varying astrophysical objects

Sokołowski, M.

doi:10.1117/2.1200612.0516

Cited by 1 publication

(2 citation statements)

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“…Because of their relatively low T g values, some compressed samples required constrained storage22 to prevent gradual re‐expansion at room temperature. MF5520 has a reported density of 0.032 g/cm,3, 7 whereas MF21 has a reported expansion ratio of 30,25 which suggests a similarly low density. Compressions were carried out with no lateral constraints.…”

Section: Introductionmentioning

confidence: 99%

“…Commercial SMP applications, such as heat‐shrink films and tubing, are well known, and the complex science behind these materials continues to be studied 1, 2. Newer medical and engineering applications, exemplified by the increasing numbers of patents and literature reports, are being pursued with urethanes, epoxies, acrylics, and biodegradable polymers 3–8. Specific urethane laminates have enabled the fabrication of a two‐way shape‐memory system 9.…”

Section: Introductionmentioning

confidence: 99%

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Thermomechanical characterization of thermoset urethane shape‐memory polymer foams

Domeier

Nissen

Goods

et al. 2009

J of Applied Polymer Sci

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The shape-memory polymer performance of urethane foams compressed under a variety of conditions was characterized. The foams were water-blown thermosets with a closed-cell structure and ranged in density from about 0.25 to 0.75 g/cm 3 . Compressive deformations were carried out over a range of strain levels, temperatures, and lateral constraints. Recovery stresses measured between fixed platens were as high as 4 MPa. Recovery strains, measured against loads up to 0.13 MPa, demonstrated the effects of various parameters. The results suggest that compression near the foam glass-transition temperature provided optimal performance. Foams with densities of about 0.5 g/cc and compressed 50% provided a useful balance (time, strain, and load) in the recovery performance.

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Section: Introductionmentioning

confidence: 99%