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Impact of degree or Polymerization of Fiber on Viscose Fiber Strength
University of Borås, Swedish School of Textiles.
University of Borås, Swedish School of Textiles.
2011 (English)Independent thesis Advanced level (degree of Master (One Year))Student thesis
Abstract [en]

The aim of the study was to find out the relationship between the DP and the tensile properties of different regenerated cellulose fibers. During the process to make regenerated cellulose fibers from wood, the reduction in DP of cellulose is a necessary process to enable fiber extrusion. The reduction of the DP is usually from 1000 to 350 (Coley 1953). The reduction in DP is necessary, first to make the cellulose soluble, and then further decrease in DP is required to control the viscosity of the solution to minimize the mechanical difficulties during processing faced. It is a fact that the reduction in DP is a compromise which is necessary, as reduction in DP means reduction in tensile properties of the fiber produced. The reduction in DP is optimized to make the process both processing and the final product more feasible. The relation in DP and the strength of the fibers is rather obvious i.e. higher the DP higher the tensile strength, but researchers have different views regarding the relationship. By the experiments performed by us we tried to come to a conclusion regarding the difference in opinions. Different types of regenerated cellulose fibers were collected from various sources. Both wet and dry tenacities of 19 different viscose, bamboo viscose, kupro viscose, modal and Tencel fibers were determined. The fiber linear density was also measured, but for some samples we had to take the fiber density value as provided by the manufacturer, due to the limitation of the instrument regarding the fiber length and low fiber linear density. Then out of all the samples 10 were selected (based on our and company’s interest). SEC analysis was used to determine the DP of the samples. These tests were not carried out by us but by MoRe Research. The results of both the analysis were gathered, analyzed and commented upon.

Place, publisher, year, edition, pages
University of Borås/Swedish School of Textiles , 2011.
Series
Magisteruppsats ; 2011.7.7
Keywords [en]
viscose, viscose fiber, fiber strength, degree of polymerization, dp, regenerated fiber, regenerated cellulose fiber
National Category
Design
Identifiers
URN: urn:nbn:se:hb:diva-20861Local ID: 2320/9253OAI: oai:DiVA.org:hb-20861DiVA, id: diva2:1312795
Note
Program: Master Programme in Textile TechnologyAvailable from: 2019-04-30 Created: 2019-04-30

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
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