A simple method for K-wire capping using nelaton rubber catheter

Hu, Jung-Woo; Jung, Sung-No

doi:10.1055/s-0039-1699331

Cited by 1 publication

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“…Stress-induced foaming phenomenon was studied previously. [48][49][50][51][52] In the solid state, two studies were carried out by directly applying external stresses to CO 2 -saturated polymers. Handa and Zhang 48 found that under compressive stresses CO 2 -saturated PMMA, PETG, PEMA, and PC showed foaming with mostly closed cells, whereas no or less foaming occurred when without the compressive stresses.…”

Section: Full Papermentioning

confidence: 99%

Solid‐state microcellular and nanocellular polysulfone foams

Guo

Nicolae

Kumar

2015

J Polym Sci B Polym Phys

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In this article, we report on the process for creating microcellular and nanocellular polysulfone (PSU) foams. Microcellular foams with cell size up to 8 mm and nanocellular foams with cell size in the range of 20-30 nm were created. A range of CO 2 concentration was achieved by varying saturation temperature, from 5% at 60 C to 14.7% at 210 C. The CO 2 concentration has a strong influence on the cellular structure.There exists a critical concentration window, between 10.7% and 12.3%, within which cell nucleation densities increase rapidly and cell sizes drop from micrometer range to below 1 mm into the nanometer range. Nanofoams with cell nucleation densities exceeding 10 15 cells/cm 3 and void fraction of up to 48% are achieved. At the high CO 2 concentration region, the change from closed nanocellular structure to bicontinuous nanoporous structure is observed. Also, nanostructures on the cell wall of microcells are observed and believed to be formed via stressinduced nucleation/spinodal decomposition. The PSU nanofoams produced in this study present an opportunity to produce polymer nanofoams with a relatively high service temperature. The ability to create cells of different length scales provides an opportunity to study the effect of cell size on the foams properties.

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Section: Full Papermentioning

confidence: 99%