The hot compaction of SPECTRA gel-spun polyethylene fibre

The compaction of gel-spun high molecular weight polyethylene (PE) fibre, SPECTRA 1000, has been investigated for a range of compaction temperatures between 142 °–155 °C. Differential scanning calorimetry (DSC), scanning electron microscopy (SEM) and broad-line nuclear magnetic resonance (NMR) techn...

Full description

Saved in:
Bibliographic Details
Published in:Journal of materials science 1997-09, Vol.32 (18), p.4821-4832
Main Authors: YAN, R. J, HINE, P. J, WARD, I. M, OLLEY, R. H, BASSETT, D. C
Format: Article
Language:English
Subjects:
Applied sciences
Deformation mechanisms
Differential scanning calorimetry
Exact sciences and technology
Fibers
Fibers and threads
Forms of application and semi-finished materials
Materials science
Melt spinning
NMR
Nuclear magnetic resonance
Polyethylene
Polyethylenes
Polymer industry, paints, wood
Recrystallization
Scanning electron microscopy
Technology of polymers
Temperature
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The compaction of gel-spun high molecular weight polyethylene (PE) fibre, SPECTRA 1000, has been investigated for a range of compaction temperatures between 142 °–155 °C. Differential scanning calorimetry (DSC), scanning electron microscopy (SEM) and broad-line nuclear magnetic resonance (NMR) techniques have been used to examine the structure of the compacted materials and to determine the compaction mechanisms. With increasing compaction temperature, the flexural properties of the compacted materials did not show any significant change up to 154 °C, but large changes were observed if the temperature was increased from 154 to 155 °C. DSC and SEM studies revealed that no evident surface melting and recrystallization occurred during hot compaction in the temperature range 144–154 °C, although the rigid crystalline fraction measured by NMR for all compacted materials is significantly lower than that for the original fibre. Significant transverse strength is also developed at the lower compaction temperatures, and this also only markedly increases on going from 154 to 155 °C. Structural investigations show how the fibres deform so as to interlock, and localized welding occurs, so as to bond each fibre to its neighbour. This is distinct from the melting and recrystallization at the surface of the fibres previously observed in melt spun fibres.
ISSN:0022-2461
1573-4803
DOI:10.1023/A:1018647401619