Materiales.Compuestos at 07:07, 6 October 2022

2022-10-06T07:07:30Z

Scipediacontent at 06:30, 3 May 2022

2022-05-03T06:30:37Z

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Scipediacontent: Scipediacontent moved page Draft Content 505602257 to Gomez-Monterde et al 2018a

2022-03-31T15:42:55Z

Scipediacontent moved page Draft Content 505602257 to Gomez-Monterde et al 2018a

Scipediacontent: Created page with "== Abstract == Lightweight construction is one of the main strategies conducted by carmakers in order to reduce fuel consumption and greenhouse gas emissions. Since the deman..."

2022-03-31T15:42:52Z

Created page with "== Abstract == Lightweight construction is one of the main strategies conducted by carmakers in order to reduce fuel consumption and greenhouse gas emissions. Since the deman..."

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== Abstract ==

Lightweight construction is one of the main strategies conducted by carmakers in order to reduce fuel consumption and greenhouse gas emissions. Since the demand of plastic and composite materials for automotive applications is continuously growing, lightening approaches like foaming techniques are being introduced with the aim of decreasing their weight. The present work aims to compare the morphology and mechanical properties of plastic foams obtained by two different foaming technologies: MuCell® and IQ Foam®. Solid and foamed plates of glass fiber reinforced-polypropylene (PP/GF) were injection molded by using MuCell® and IQ Foam® processes combined with the complementary tool technology Core Back expansion molding. The morphology analysis of the obtained plates was carried out through Scanning Electron Microscopy (SEM) and Computed Tomography (CT) techniques, and the mechanical properties were assessed by means of tensile, flexural and impact tests.
The morphology analysis revealed the presence of solid skin-foamed core structure in the foamed samples. The mechanical properties decreased gradually with the apparent density of the microcellular plates. By increasing the thickness of the part because of the expansion of the cavity, the apparent density decreased but the flexural stiffness was greatly enhanced. Foamed samples obtained by IQ Foam® technology exhibited lower cell density than that of the MuCell® ones, but consequently higher resistant area, and thus, slightly higher mechanical properties. The new IQ Foam® technology is able to produce foamed parts with properties comparable to that of the MuCell® process, offering additional benefits such as cost-effectiveness, easy to use and machine-independence.

== Full document ==
<pdf>Media:Draft_Content_505602257native-articles-114.pdf</pdf>

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 ==1 Introduction==
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 Consequently, IQ Foam® arises as a potentially cost-effective and machine-independent process, easy to start up and reducing both weight and cost of plastic products significantly.
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-<span style="text-align: center; font-size: 75%;">'''Table 1.''' Morphological parameters of MuCell® and IQ Foam® foamed PP 20GF plates.</span></div>
+<span style="text-align: center; font-size: 75%;">'''Table 1.''' Morphological parameters of MuCell® and IQ Foam® foamed PP 20GF plates</span></div>
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 In reference to the comparison between foaming technologies, tensile and flexural modulus as well as impact resistance of samples obtained by IQ Foam® process were higher and differed from the corresponding ones to MuCell® in approximately 10%. The thicker solid skins seems to be the most likely reason for this results. On the basis of the lower blowing agent incorporated in the IQ Foam® plates, the consequent reduction in cell density led to wider cell struts and higher effective bearing area able to withstand higher mechanical loads. These differences between foamed samples through both processes were lowered when Core Back was applied and the volume cavity was increased, which suggests that, as the part gets thicker, the mechanical properties became more dependent on apparent density and the overall thickness than upon skin thickness and cell density.
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 In this work the morphology and mechanical properties of PP 20GF foams obtained through injection molding techniques and combined with tool technologies were analyzed. By pulling the core and increasing the final thickness of the part with the Core Back tool process, the apparent density decreased, solid skins got thinner but cells became bigger. Absolute mechanical properties decreased with the apparent density but specific ones remained close to that of the solid material. Furthermore, design criteria parameters such as the bending stiffness were greatly enhanced due to the build-up in the overall thickness.
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← Older revision	Revision as of 15:42, 31 March 2022
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Gomez-Monterde et al 2018a - Revision history

Materiales.Compuestos at 07:07, 6 October 2022

Scipediacontent at 06:30, 3 May 2022

Scipediacontent: Scipediacontent moved page Draft Content 505602257 to Gomez-Monterde et al 2018a

Scipediacontent: Created page with "== Abstract == Lightweight construction is one of the main strategies conducted by carmakers in order to reduce fuel consumption and greenhouse gas emissions. Since the deman..."