The effect of polypropylene/polyethylene (PP/PE) blends viscoelasticity on PP foaming

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Journal of Beijing University of Chemical Technology ›› 2013, Vol. 40 ›› Issue (3) : 50-55.

材料科学与工程

HOU YanTing;HE YaDong;LI QingChun;XIN ChunLing

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The effect of four different kinds of polyethylene (PE)—low-density polyethylene (LDPE), linear low density polyethylene (LLDPE), high-density polyethylene (HDPE) and thermoplastic elastomer (TPE)—on polypropylene (PP) foaming has been analyzed based on a large number of PP foaming experiments carried out using a self-designed supercritical liquid foaming apparatus, four kinds of PP/PE blends as a matrix and supercritical carbon dioxide (SCCO₂) as the foaming agent. The rheological behavior of the PP/PE blends was investigated with a rheometer. The results showed that the storage modulus and viscosity of the HDPE/PP and TPE/PP blends were higher than the corresponding values for the LDPE/PP and LLDPE/PP blends, which gave the benefits of reduced cell rupture and coalescence, thus affording higher quality products.

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HOU YanTing;HE YaDong;LI QingChun;XIN ChunLing. The effect of polypropylene/polyethylene (PP/PE) blends viscoelasticity on PP foaming[J]. Journal of Beijing University of Chemical Technology, 2013, 40(3): 50-55

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Received	Revised	Published
2012-09-06	1900-01-01	2013-05-20
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2013-07-20

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