CRYSTALLIZATION AND STRESS-STRAIN PROPERTIES OF ULTRA-HIGH-MOLECULAR-WEIGHT POLYETHYLENE GELS FILLED WITH IRON PARTICLES

Citation
Ml. Kerber et al., CRYSTALLIZATION AND STRESS-STRAIN PROPERTIES OF ULTRA-HIGH-MOLECULAR-WEIGHT POLYETHYLENE GELS FILLED WITH IRON PARTICLES, Polymer engineering and science, 37(8), 1997, pp. 1359-1366
Citations number
20
Categorie Soggetti
Polymer Sciences","Engineering, Chemical
ISSN journal
00323888
Volume
37
Issue
8
Year of publication
1997
Pages
1359 - 1366
Database
ISI
SICI code
0032-3888(1997)37:8<1359:CASPOU>2.0.ZU;2-H
Abstract
Crystallization of ultra-high-molecular-weight-polyethylene [UHMW-PE) filled solutions and gels was studied by differential scanning calorim etry. It has been found that the structure and properties of the gelat ing systems depend on solvent type, polymer concentration, and filler. Crystallization rate decreases as the polymer content is increased. T he crystallization rate dependence on filler concentration passes thro ugh a maximum. The influence of a disperse filler on the structure, th e stress-strain and relaxation properties of UHMW-PE gels has been stu died. The results demonstrate the advantage of using less thermodynami cally active solvents (thermodynamic activity means polymer-solvent in teraction]. This gel-technology enables us to obtain UHMW-PE based mat erials with a 90-vol% content of iron particles. Highly loaded fibers based on UHMW-PE were obtained with a tensile strength of 40-50 MPa an d an elastic modulus of 350-400 MPa.