Characterization of the Structure, Acoustic Property, Thermal Conductivity, and Mechanical Property of Highly Expanded Open‐Cell Polycarbonate Foams

Abstract

This paper studies the processing, structural, and property relationships needed for highly expanded open-cell polycarbonate (PC) foams. Acoustic insulation, thermal conductivity, and mechanical properties of the foams were characterized. Using foam injection molding, samples expansion ratios ranging from 1 to 8 and open-cell content up to 85% were prepared. Relative to their solid counterparts, the sound wave transmission loss was increased up to 2.5-fold while their thermal conductivity was decreased up to fivefold. Thus, lightweight rigid PC foams, useful in both sound and thermal insulation applications, were developed.

Fabrication of open‐porous PCL/PLA tissue engineering scaffolds and the relationship of foaming process, morphology, and mechanical behavior

“…In addition, as the foaming temperature increases, the cell size increased, and the ability of the microcellular materials to resist deformation decreased, so the elastic modulus decreased. At 120°C, the morphology of the cells formed was better and the ability to resist external force was also stronger …”

“…At 120°C, the morphology of the cells formed was better and the ability to resist external force was also stronger. 27 Furthermore, the mechanical properties of the two ratio blend samples were significantly different. When the PLA content was high, the tensile strength and elastic modulus were higher, and the elongation at break was lower, and tensile strength and elastic modulus decreased with the increase of the average cell size and increased with the increase of cell density.…”

Degradation Behavior of Polypropylene during Reprocessing and Its Biocomposites: Thermal and Oxidative Degradation Kinetics

“…Wood fiber particles are impregnated and covered by the thermoplastic phase, and the considerably higher decomposition temperature of PP, accompanied by the inherently low thermal conductivity of polymers, can delay the degradation of the wood components [24,44]. The slight increase in the T peak of PP can probably be explained by two mechanisms: the heat sink effect of the residual ash [45] and the thermal insulating effect of the foam-like structure of PP [46]. The first explanation lies in the fact that the residual ash remaining from the degradation of the cellulose and hemicellulose of wood fiber may absorb the heat, and thereby delaying the degradation of the PP component.…”

Preparation and Sound Insulation Performance of Superfine Metal Powder/Nitrile-Butadiene Rubber-Polyvinyl Chloride Microcellular Foaming Material

“…No. NBR PVC DOP SFM Stearic acid CZ Sublimed sulfur AC 1# 70 30 30 0 1.5 1.4 2 10 2# 70 30 30 10 1.5 1.4 2 10 3# 70 30 30 20 1.5 1.4 2 10 4# 70 30 30 30 1.5 1.4 2 10 5# 70 30 30 40 1.5 1.4 2 10 needed for highly expanded open-cell polycarbonate (PC) foams, and acoustic insulation, thermal conductivity, and mechanical properties of the foams were characterized [11]. The introduction of organic particles will lead to the heavier weight of polymer consequently.…”