Effect of mold temperature on the structures and mechanical properties of micro-injection molded polypropylene - Université de Lorraine Access content directly
Journal Articles Materials & Design Year : 2015

Effect of mold temperature on the structures and mechanical properties of micro-injection molded polypropylene

Abstract

The effects of the mold temperature of micro-injection molding on the microstructures and mechanical properties of isotactic polypropylene (PP) gears were studied. The micro-injection molded PP gears present a skin-core type of morphology. The core layer is much thicker than the core and shear layers. The generation of 13 polymorph in the test samples is easily promoted during the micro-molding process with high shear rate at low temperature, or low shear rate at high temperature. Nanoindentation tests show that the modulus decreases along the flow direction and increases with increasing mold temperature. The highly oriented shear layer has the highest nano-indentation modulus compared with the skin and core layers.
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hal-01264855 , version 1 (29-01-2016)

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Jing Jiang, Shiwei Wang, Bo Sun, Shuaijiang Ma, Jianming Zhang, et al.. Effect of mold temperature on the structures and mechanical properties of micro-injection molded polypropylene. Materials & Design, 2015, 88, pp.245-251. ⟨10.1016/j.matdes.2015.09.003⟩. ⟨hal-01264855⟩
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