Elastic properties of highly anisotropic thin poly(propylene) foams

TL;DR

This paper investigates the elastic properties of highly anisotropic poly(propylene) foams, revealing unique behavior with lower Young's modulus at high densities compared to typical foams, expanding understanding of cellular material mechanics.

Contribution

It reports the elastic properties of anisotropic poly(propylene) foams and identifies their distinct behavior in the relative Young's modulus versus density relationship.

Findings

The material exhibits lower relative Young's modulus at high densities.

Most literature data follow a power-law with exponent 1 to 6.

The new material shows a higher power-law exponent, n ≥ 6.

Abstract

In this letter, elastic properties of highly anisotropic cellular poly(propylene) films are reported. The material shows peculiar elastic properties compared to other foams in the literature. The data is displayed as the relative Young's modulus $E^*/E_s$ versus relative density $\rho^*/\rho_s$. Almost all the data from the literature are located on the region $E^*/E_s=(\rho^*/\rho_s)^n$ with $1\le n\le6$. The introduced material on the other hand have lower relative Young's modulus at high relative densities, $n\ge6$.