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 then the mechanical properties were obviously improved. The cell in the alternating multilayered sheet with 16 layers was smaller and more homogenous than that in pure PP foaming sheet.

GRAPHICAL ABSTRACT

Keywords:

• Alternating multilayered structure
• Foaming
• Morphology
• Polypropylene
• Properties