SVIBOR - Project code: 2-14-035

MINISTRY OF SCIENCE AND TECHNOLOGY

Strossmayerov trg 4, HR - 10000 ZAGREB
tel.: +385 1 459 44 44, fax: +385 1 459 44 69
E-mail: ured@znanost.hr

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Project code: 2-14-035


MODIFIED SYNTHETIC FIBRES


Main researcher: ČUNKO, RUŽICA (78214)


Assistants
Type of research: applied
Duration from: 01/01/91. to 12/31/94.
Papers on project (total): 37
Papers on project quoted in Current Contents: 2
Institution name: Tekstilno tehnološki fakultet, Zagreb (117)
Department/Institute: Department of Textile Chemistry & Material Testing
Address: Savska cesta 16/5, 10 000 Zagreb, CROATIA
City: 10000 - Zagreb, Croatia
Communication
Phone: 385 (0)1 27-57-67
Fax: 385 (0)1 44-02-76
E-mail: LUKA.CAVARAůx400.SRCE.HR
Summary: Investigation have been focused on polyester (PES) and polypropylene (PP) fibres of modified properties, and partially on elastomeric elastane (EL) and elastodiene (ED) fibres. The impact of molecular composition and supramolecular modification scaused by various interventions in polymer synthesis process, as well as of fibre spinning, processing and application on important end-use properties, have been investigated. In molecular structure investigations, attention has been paid to the determination of macromolecules size and macromolecular mass distribution, changes in configuration regularity, degradation and decomposition. In supramolecular structure investigations the changes of order and fibre structure orientation in relation to horizontal and vertical axis has been observed. The changes in molecular and supramolecular structure are related to various fibre properties essential for processability in textile industry and end-use of the products manufactured from these fibres (oligomere content, physico-chemical and thermal characteristics, morphological characteristics, resistance to short-term and repeated loadings, proneness to aging, tendency to pilling etc.). Functional dependence of the interventions and resultant modifications are analysed. In order to achieve the modifications of domestic PES fibre (Vartilen) aimed for, the influence of the following technological parameters in polymere synthesis and fibre spinning has been investigated: catalyst variations, comonomer trimethylolpropane addition, substitution of high purified terephtalic acid (HPTA, fibre-grade) with medium purified terephtalic acid (MPTA) in polymer synthesis, addition of dyes and delustring agent in polymer melt and utilisation of various ratios in technological process of drawing. PP fibres has been investigated for degradation under the influence of various physico-chemicals agents: thermal degradation and decomosition kinetics, photodegradation in a natural and artificial environment and ozone degradation. Elastomere fibres investigation are strictly applicative, with the focus on factors having impact on the permanence of elastic elongation, as the most important applicative property of these fibres.

Keywords: modified synthetic fibres, polyester fibres, polypropylene fibres, elastomere fibres, elastane fibres, elastodiene fibres, aramide fibres, molecular structure of fibre, super molecular structure of fibre, physico-mechanical properties of fibres, properties modification, ageing process in natural environment, aging process in artificial environment, chemical degradation of polymer, thermal degradation, kinetics of thermal decomposition, fibre surface characteristics

Research goals: Through the investigation of structure and properties of standard and modified fibres, the project aims at a better characterisation of these fibres, as well as at clarifying the influence of certain interventions in molecular and supramolecular structure on the modifications aimed for instandard-type fibres. Likewise, possible detrimental influences of certain interventions on fibre properties not meant to be modified are investigated. The knowledge obtained through such investigations of linkage: technological parameter changes/fibre structure changes/processing and usage properties changes, have a direct applicable value and can be used by domestic synthetic fibres producers for directing their production to the aimed for modification of standarf-type fibre properties and production optimisation. Certain theoretical contribution in understanding of functional dependence of parameters investigated, and determining certain kinetic parameters of thermal decomposition of PP fibres, which have not been completely investigated and defined up to now, is expected. Publishing the papers on results obtained is supposed to enlarge the amount of knowledge in textile technology and be used by the experts in the field who are involved with fibres production and processing to optimise production and enhance fibre quality.

COOPERATION - INSTITUTIONS


  1. Name of institution: Institut "Ruđer Bošković"
    Type of institution: State institute
    Type of cooperation: Occasional exchange of information
    City: 10000 - Zagreb, Croatia

  2. Name of institution: Tvornica poliesterskih vlakana "vartilen"
    Type of institution: Economical/Production
    Type of cooperation: Occasional exchange of information
    City: 42000 - Varaždin, Croatia

  3. Name of institution: Geofizički zavod Hrvatske
    Type of institution: State institute
    Type of cooperation: Occasional exchange of information
    City: 10000 - Zagreb, Croatia

  4. Name of institution: Hidrometeorološki zavod Hrvatske
    Type of cooperation: Occasional exchange of information
    City: 10000 - Zagreb, Croatia

  5. Name of institution: RIS
    Type of institution: Economical/Production
    Type of cooperation: Other
    City: 10000 - Zagreb, Croatia

  6. Name of institution: CHROMOS
    Type of institution: Institution whose primary activities ar
    Type of cooperation: Other
    City: 10000 - Zagreb, Croatia

  7. Name of institution: Pliva
    Type of institution: Institution whose primary activities ar
    Type of cooperation: Other
    City: 10000 - Zagreb, Croatia
Other information about the project.
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Last update: 10/10/95
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