Iranian Polymer Journal, ( ISI ), Volume (16), No (6), Year (2007-1) , Pages (363-37)

Title : ( Gel Spinning Characteristics of Ultra-high MolecularWeight Polyethylene and Study on Fibre Structure before Drawing )

Authors: Zahra Maghsoud , Homayoun Moaddel ,

Access to full-text not allowed by authors

Citation: BibTeX | EndNote

Monofilaments precursor of linear ultra-high molecular weight polyethylene (UHMWPE) were produced by gel spinning at controlled conditions. The rheological behaviour of UHMWPE solution (gel) was studied in paraffin oil at 175ºC with deformation rates in the range 600-11000 s-1 which was in good agreement with power law model. The effect of paraffin concentration of the extraction bath was determined on the amount of paraffin remained in the precursor fibre and on the extraction time. The desorption behaviour of paraffin/UHMWPE system is in accordance with Flory-Huggins model. The precursor fibre structure and its morphology before drawing process is a determining parameter in drawability and properties of the produced fibre. Thus, the effects of processing conditions such as spinning speed, spinneret geometry, and temperature of the region between the die and the quench bath were investigated on the crystallinity of the precursor fibre. High deformation rates ( ) caused by decreasing the die diameter or increasing the spinning speed result in more macromolecular orientation and increased degree of crystallinity. Significant recrystallization or crystal perfection took place during the solvent extraction step which increased the melting point of the precursor fibre from 118.5ºC to 147ºC. Maghsoud Z. et al. A B S T R A C T Key Words: Gel Spinning Characteristics of Ultra-high MolecularWeight Polyethylene and Study on Fibre Structure before Drawing Zahra Maghsoud∗ and Homayoun Moaddel Polymer Engineering Department, Tarbiat Modares University, P.O. Box: 14115/143 Tehran, Iran Received 4 December 2005; accepted 30 June 2007 INTRODUCTION UHMWPE fibre; X-ray diffraction; thermal analysis; extraction; rheological behaviour. (*) To whom correspondence to be addressed: E-mail: Maghsoud@modares.ac.ir Iranian Polymer Journal 16 (6), 2007, 363-373 Available online at: http://journal.ippi.ac.ir Highly oriented ultra high molecular weight polyethylene (UHMWPE) fibres and production of ultra high modulus fibre have been studied extensively during the last two decades. The original ideas behind the production of these fibres were based on attempts to transform the chain folded crystalline and amorphous structure of UHMWPE to a highly oriented chain extended structure exhibiting nearly perfect molecular orientation [1]. High tenacity and high modulus polyethylene fibres

Keywords

, UHMWPE fibre; X, ray diffraction; thermal analysis; extraction; rheological
برای دانلود از شناسه و رمز عبور پرتال پویا استفاده کنید.

@article{paperid:1035473,
author = {Maghsoud, Zahra and Homayoun Moaddel},
title = {Gel Spinning Characteristics of Ultra-high MolecularWeight Polyethylene and Study on Fibre Structure before Drawing},
journal = {Iranian Polymer Journal},
year = {2007},
volume = {16},
number = {6},
month = {January},
issn = {1026-1265},
pages = {363--37},
numpages = {-326},
keywords = {UHMWPE fibre; X-ray diffraction; thermal analysis; extraction; rheological behaviour},
}

[Download]

%0 Journal Article
%T Gel Spinning Characteristics of Ultra-high MolecularWeight Polyethylene and Study on Fibre Structure before Drawing
%A Maghsoud, Zahra
%A Homayoun Moaddel
%J Iranian Polymer Journal
%@ 1026-1265
%D 2007

[Download]