2015
DOI: 10.1080/03602559.2014.979499
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Morphology and Properties of Polypropylene Foaming Sheet with Alternating Multilayered Structure

Abstract: In this work, the foaming sheet was designed as alternating multilayered foam/film structure of foaming layers and film layers. The foaming layer contained polypropylene (PP)/high density polyethylene (HDPE)/Talc ternary composites. The film layer contained PP only. The rheological data showed that the melt elasticity of PP was obviously improved by the addition of HDPE and talc. The results exhibited that the alternating multilayered structure was well kept and hardly influenced by the foaming layers, and the… Show more

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Cited by 10 publications
(5 citation statements)
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“…Hence, it would be very hard for the cells to grow from the PS layers, and then, the PS layers became the unfoamed film (Figure b 3 ). The gas dissolved in PS layers would then be used for cell nucleation and growth in PS–SiO 2 layers, as the activation energy for heterogeneous cell nucleation is much lower than that for homogeneous cell nucleation. , However, the film thickness in the alternating film/foam assemblies formed in this study is much thinner compared to those about 20–200 μm in the literature , prepared via coextrusion with chemical foaming agents. The preparation approach provided in this study can save more materials and obtain film/foam assemblies of lower densities.…”
Section: Resultsmentioning
confidence: 82%
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“…Hence, it would be very hard for the cells to grow from the PS layers, and then, the PS layers became the unfoamed film (Figure b 3 ). The gas dissolved in PS layers would then be used for cell nucleation and growth in PS–SiO 2 layers, as the activation energy for heterogeneous cell nucleation is much lower than that for homogeneous cell nucleation. , However, the film thickness in the alternating film/foam assemblies formed in this study is much thinner compared to those about 20–200 μm in the literature , prepared via coextrusion with chemical foaming agents. The preparation approach provided in this study can save more materials and obtain film/foam assemblies of lower densities.…”
Section: Resultsmentioning
confidence: 82%
“…In recent years, multilayered foams have emerged as a new branch of foams that feature alternating layered structures. Due to the special cell structure, the multilayered foams show excellent mechanical, thermal insulation, and sound absorption properties. Till now, different approaches have been reported about the preparation of multilayered foams.…”
Section: Introductionmentioning
confidence: 99%
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“…However, compared to polyethylene, isotactic polypropylene more easily undergoes degradation upon irradiation, resulting in a poorer resistance to weathering [18,19]. Many studies have been performed on the foaming of PP by scCO2 [20][21][22]. The melt strength and mechanical and heat-resistant properties of polypropylene have been shown to be significantly improved by irradiation in the presence of a cross-linking agent [23].…”
Section: Gel Content and Melt Flow Index Analysesmentioning
confidence: 99%
“…The cell nucleation, bubble growth and the final cell morphology of extruded PP foams have been studied extensively (2)(3)(4)(5)(6). Earlier studies attempted to enhance the melt strength by partial crosslinking of PP (7).…”
Section: Introductionmentioning
confidence: 99%