TRANSPARENCY AND DICHROISM OF ULTRA-DRAWN UHMW-PE FILMS IN THE VISIBLE WAVELENGTH RANGE

Citation
C. Bastiaansen et al., TRANSPARENCY AND DICHROISM OF ULTRA-DRAWN UHMW-PE FILMS IN THE VISIBLE WAVELENGTH RANGE, Polymer, 34(18), 1993, pp. 3951-3954
Citations number
29
Categorie Soggetti
Polymer Sciences
Journal title
ISSN journal
00323861
Volume
34
Issue
18
Year of publication
1993
Pages
3951 - 3954
Database
ISI
SICI code
0032-3861(1993)34:18<3951:TADOUU>2.0.ZU;2-6
Abstract
The optical properties in the visible wavelength range (400-800 nm) of solution-cast, ultra-drawn, ultra-high-molecular-weight polyethylene (UHMW-PE, M(w)BAR>10(6) g mol-1) films were investigated. UHMW-PE film s, drawn 30 times at 125-degrees-C, possess a rather low transmittance (40-60%) in the visible wavelength range. However, highly transparent films with a transmittance exceeding 90% are obtained by applying a s urface coating to the films. Dichroism in the visible wavelength range can be generated in drawn UHMW-PE films by incorporating dichroic dye s. Certain dichroic dyes were found to orient during solid-state drawi ng. Dichroic UHMW-PE films with a dichroic ratio of 30 and an order pa rameter of 0.91 were produced.