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Title: Evaluation of traditional jute classification system for composites
Authors: Noger, D
Zah, R
Schmid, H R
Ral, P
Grether, T
Dinkel, F
Keywords: Composites;Lignification;Thermostability;Tossa jute;Whiteness
Issue Date: Jun-2005
Publisher: NISCAIR-CSIR, India
IPC Code: Int. CI.7D06B19/00, 006H3/00
Abstract: The traditional jute classification system has been evaluated to determine its suitability for the application to composites. Five potentially relevant parameters for composites, namely thennostability, alkali-soluble fraction, degree of fibre damage (degree of polymerization and tensile strength ), degree of lignification (acid-soluble lignin and acid-insoluble lignin ), and degree of whiteness (CIE y and CIE Y), have been determined by analysing the upper and lower sections of different tossa jute samples. Using discriminant analysis, 100% of the samples are correctly re-assigned to the original groups (TD class, upper and lower sections). For samples arranged in TD classes, primarily the degree of whiteness makes the differentiation possible. For samples grouped in upper and lower sections, primarily the alkali -soluble fraction as well as the degree of lignification and whiteness are found to show a significant relative difference. As regards composite quality, the thermostability, alkali-soluble fraction and degree of lignification are potentially very relevant. With respect to these parameters, the traditional jute classification system does not appear to be suitable as there is no significant difference among TD classes, and the variations between the upper and the lower sections are significantly greater than those among TD classes. The largest relative differences exist for thermostability, but there is no significant difference among the samples analysed. A new fibre classification system is needed for the successful application of jute fibres to composites.
Page(s): 166-173
ISSN: 0975-1025 (Online); 0971-0426 (Print)
Appears in Collections:IJFTR Vol.30(2) [June 2005]

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