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Recommended Papers for: hardness

Total Papers Found: 8

Thermal Composites of Biobased Polyamide with Boron Nitride Micro Networks

In this paper, polyamide (PA, composed of at least 60% renewable materials) was used as a polymer matrix to prepare PA-hexagonal boron nitride (hBN) polymer composites with varying hBN contents. Two different PA samples were used in this study: a low viscosity grade PA (PA-30), as well as a high viscosity grade PA (PA-90). The composite polymers were tested to evaluate their thermal, physical, and mechanical properties. It was concluded that ...

Author(s): , , ,

High thermally conductive PLA based composites with tailored hybrid network of hexagonal boron nitride and graphene nanoplatelets

Polyactic acid (PLA)-micro hexagonal boron nitride (hBN)-graphene nanoplatelet (GNP) polymer composites were prepared, and the effects of varying filler contents on the thermal and mechanical properties of the polymer composites were investigated. It was determined that the addition of the GNPs resulted in a decrease in thermal conductivity in comparison to a PLA-hBN composite unless the GNP:hBN ratio was 1:1, where the thermal conductivity was equal to that ...

Author(s): , , ,

A study on microreplication of real 3D-shape structures using elastomeric mold: from pure epoxy to composite based on epoxy

A novel replication technique for the fabrication of 3D microstructures was developed. A polished silicon wafer was transferred onto an epoxy composite. The thermal properties of the epoxy composite were investigated and compared to those of the pure epoxy. It was determined that not only was the thermal conductivity increased, but the epoxy composite also showed an improvement in mechanical properties over the pure epoxy....

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Composite Propellant Based on a New Nitrate Ester

The use of 2,3-hydroxymethyl-2,3-dinitro-1,4-butanediol tetranitrate (SMX) as an oxidizer for solid composite rocket propellants was evaluated by the authors. SMX is an attractive alternative to the oxidizer used more traditionally, ammonium perchlorate (AP) because it is less toxic to the environment. It was found that SMX is very similar to AP in its handling characteristics, and thermal diffusivity; however, its thermal conductivity was lower than that of AP....

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Structure and physical properties of EVA/starch precursor materials for foaming applications

Synthetic polymers in starch-based polymer formulations improve the thermal and mechanical properties of the compounds. The purpose of this study was to develop and analyze foams containing ethylene-vinyl acetate (EVA) and varying concentrations of corn starch. A Thermal Constants Analyser measured the thermal conductivity of the EVA/starch samples using the transient plane source (TPS) method. Results showed that the thermal conductivity of the blends increased with starch content. The ...

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