Production of Biodegradable Foams Using Supercritical CO₂

Abstract

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TPU/PLA blend foams: Enhanced foamability, structural stability, and implications for shape memory foams

“…For instance, at 130 °C foaming temperature, 10 MPa foaming pressure did not yield any foaming whereas 20 MPa completely melted the sample. This melting at 130 °C (well below the normal PLA melting point) was due to CO 2 ‐induced melting point depression . The observed characteristics, for example, difficult to foam with a narrow foaming window, were typical of PLA foaming .…”

Morphology and Properties of Polypropylene Foaming Sheet with Alternating Multilayered Structure

“…On the other hand, the foaming condition was important to the foaming process of PP [13][14][15][16][17] . It was well-known that the properties of the foams were determined by their structure, such as cell type, cell size and cell size distribution, which was strongly dependent on the foaming condition [18][19][20][21] .…”