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The study of interactions between binder system components is critical for improving the processing properties of powder injection moulding (PIM) feedstocks. In this paper the interactions between acrawax (AW) and polyethylene glycol (PEG) were analysed and compared with those obtained for carnauba wax (CW). Due to the complexity of interaction mechanisms, the polymers were substituted with their basic low molecular weight analogues and analysed by FTIR and calorimetry. Self-interaction energies and association energies were determined using calorimetric analysis. Shifts of FTIR absorption peaks (C-O stretch and N-H stretch) served as evidence of the presence of interactions between the components. The calorimetric study of AW/PEG analogues showed a temperature increase during mixing, indicating the presence of strong interactions. The combined data from FTIR and calorimetry allowed a quantitative evaluation, which indicated about two times stronger interactions between AW (with C=O and N-H groups) and PEG (with C-O and -OH groups), as compared to CW (with C=O and C-O groups) and PEG analogues.

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This paper reports the substitution of polyolefin backbone binder components with low melting temperature carnauba wax for powder injection moulding applications. The effect of various binder compositions of Al 2 O 3 feedstock on thermal degradation parameters is investigated by thermogravimetric analysis. Within the experimental framework 29 original feedstock compositions were prepared and the superiority of carnauba wax over the polyethylene binder backbone was demonstrated in compositions containing polyethylene glycol as the initial opening agent and governing the proper mechanism of the degradation process. Moreover, the replacement of synthetic polymer by the natural wax contributes to an increase of environmental sustainability of modern industrial technologies.

In this study thermal degradation of feedstock based on Al2O3 high compressible superground powder was investigated. The alumina powder was mixed with polymeric binders to compose the feedstock. Binder systems for CIM (Ceramic Injection Moulding) technology differed in concentration and composition of polyethylene, polyethylene glycol, low density polyethylene and waxes. The debinding and pre-sintering behavior of formulated feedstocks was characterized by thermogravimetric analysis. The results demonstrated the relationship between the feedstock thermal degradation properties and the binder system composition.