Cold Compression Molding of Ultra High Molecular Weight Polyethylene. Part 1: Influence of the Size, Distribution and Morphology of Particles on the Green Density | Health & Environmental Research Online (HERO)

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Citation
Tags

HERO ID

4960714

Reference Type

Journal Article

Title

Cold Compression Molding of Ultra High Molecular Weight Polyethylene. Part 1: Influence of the Size, Distribution and Morphology of Particles on the Green Density

Author(s)

Bittencourt, BA; Ellwanger, MV; Do Nascimento, WA; Belchior, LF; Araujo, EM; Melo, TJA

Year

2009

Volume

Issue

Page Numbers

224-230

DOI

10.1590/S0104-14282009000300011

Web of Science Id

WOS:000270656800010

Abstract

In this paper an investigation was made of the characteristics of Ultra High Molecular Weight Polyethylene (UHMWPE) powder samples, including porosity, particles average size, size distribution and morphology, which are important in cold compression molding. The influence of these characteristics on the green density of molded pre-shapes was also investigated. The UHMWPE powder samples were characterized by Differential Scanning Calorimetry (DSC), granulometric analysis, oil absorption, surface area, mercury porosity, density compaction, apparent density and Scanning Electron Microscopy (SEM). The characterization techniques used demonstrate that the UHMWPE particles characteristics cited above as well as the densification parameter (DP), which is a direct function of the interparticles porosity, affect the relative green density (RGD) and hence, the flexural tensile strength (FTS).

Keywords

UHMWPE; characterization; cold compression; green density