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Microcellular injection moulding is capable of producing lightweight polymeric products.
The present study analyses the influence of several representative injection moulding
parameters on the foam’s morphology, apparent density and thermo-mechanical properties
of PETG, poly(ethylene terephthalate-co-1,4-cyclohexylene-dimethylene terephthalate)
specimens. A strong variation of the cell morphology along the melt flow
direction has been found, as well as a dependence on the shot volume. The most
homogeneous microcellular structure is achieved when low shot volume, intermediate
injection speed and low mould temperature are employed. The skin–core structure of
the injected parts, determined the thermo-mechanical features of the specimen, which
are ruled by the skin layer.
CitationGómez-Gómez, J.F. [et al.]. Influence of the injection moulding parameters on the microstructure and thermal properties of microcellular polyethylene terephthalate glycol foams. "Journal of cellular plastics", 2013, vol. 49, núm. 1, p. 47-63.
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