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master's thesis
Utjecaj vrste i dodatka kore na kinetiku otvrdnjavanja urea-formaldehidne (UF) smole
Zagreb: University of Zagreb, Faculty of Forestry, 2020. urn:nbn:hr:108:110064
Mikšik, Mislav
University of Zagreb
Faculty of Forestry and Wood Technology
Institute of Materials Technology

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Mikšik, M. (2020). Utjecaj vrste i dodatka kore na kinetiku otvrdnjavanja urea-formaldehidne (UF) smole (Master's thesis). Zagreb: University of Zagreb, Faculty of Forestry and Wood Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:108:110064

Mikšik, Mislav. "Utjecaj vrste i dodatka kore na kinetiku otvrdnjavanja urea-formaldehidne (UF) smole." Master's thesis, University of Zagreb, Faculty of Forestry and Wood Technology, 2020. https://urn.nsk.hr/urn:nbn:hr:108:110064

Mikšik, Mislav. "Utjecaj vrste i dodatka kore na kinetiku otvrdnjavanja urea-formaldehidne (UF) smole." Master's thesis, University of Zagreb, Faculty of Forestry and Wood Technology, 2020. https://urn.nsk.hr/urn:nbn:hr:108:110064

Mikšik, M. (2020). 'Utjecaj vrste i dodatka kore na kinetiku otvrdnjavanja urea-formaldehidne (UF) smole', Master's thesis, University of Zagreb, Faculty of Forestry and Wood Technology, accessed 06 January 2025, https://urn.nsk.hr/urn:nbn:hr:108:110064

Mikšik M. Utjecaj vrste i dodatka kore na kinetiku otvrdnjavanja urea-formaldehidne (UF) smole [Master's thesis]. Zagreb: University of Zagreb, Faculty of Forestry and Wood Technology; 2020 [cited 2025 January 06] Available at: https://urn.nsk.hr/urn:nbn:hr:108:110064

M. Mikšik, "Utjecaj vrste i dodatka kore na kinetiku otvrdnjavanja urea-formaldehidne (UF) smole", Master's thesis, University of Zagreb, Faculty of Forestry and Wood Technology, Zagreb, 2020. Available at: https://urn.nsk.hr/urn:nbn:hr:108:110064

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Metadata
TitleUtjecaj vrste i dodatka kore na kinetiku otvrdnjavanja urea-formaldehidne (UF) smole
Title (english)The effect of wood bark type and addition on kinetics of urea-formaldehyde (UF) resin curing
AuthorMislav Mikšik
MentorNikola Španić (mentor)
Committee memberKristijan Radmanović (član povjerenstva)
Committee memberVladimir Jambreković (član povjerenstva)
Committee memberNikola Španić (predsjednik povjerenstva)
GranterUniversity of Zagreb
Faculty of Forestry and Wood Technology
(Institute of Materials Technology)
Zagreb
Defense date and country2020-09-25, Croatia
Scientific / art field,
discipline and subdiscipline		BIOTECHNICAL SCIENCES
Wood Technology
Wood Technological Processes
Abstract
Kora je često zanemarena u proizvodnji ploča od usitnjenog drva i smatra se nepoželjnom jer smanjuje fizikalna i mehanička svojstva ploča. Ipak, u novije se vrijeme sve više razmišlja o kori kao dijelu sirovine za proizvodnju ploča iverica. Posljedično, raste broj znanstvenih radova koji su mahom orijentirani prema fizikalno-mehaničkim svojstvima ploča iz kore, a daleko manje se bave sustavom smola-(kora)-katalizator. Upravo iz potonje navedenog razloga u ovom je diplomskom radu utvrđen utjecaj vrste kore, sadržaja i prisustva slobodnih i ukupnih (vezanih) kiselina drva na kinetiku otvrdnjavanja urea-formaldehidne (UF) smole korištene za proizvodnju ploča iverica. Pritom je, za određivanje utjecaja kore na otvrdnjavanje UF smole korištena diferencijalna pretražna kalorimetrije (DSC), uz proračun aktivacijske energije sustava smola katalizator-ekstrakt(kora) primjenom Kissinger-Akira-Sunose (KAS) modela. Rezultati ispitivanja pokazali su značajan utjecaj slobodnih i/ili vezanih kiselina kore na proces otvrdnjavanja smole i ukazali na njihovo pufersko djelovanje u procesu polimerizacije.
Abstract (english)
The bark is often neglected in the production of particleboards and is considered undesirable because it reduces physical and mechanical properties. However, in recent times thinking about bark as part of the raw material for production of particleboard is increasing. Consequently, the number of scientific papers that are mostly oriented towards physical-mechanical properties of boards from the bark is increasing, and far less they deal with the resin- bark-catalyst system. It is for the latter reason that it is in this thesis determined the influence of the type of bark, content and the presence of free and total (bound) wood acids on curing kinetics of urea-formaldehyde (UF) resin used to produce particleboards. In doing so, for determination of the influence of bark on the curing of UF resin differential scanning calorimetry (DSC) has been used, with the calculation of the activation energy of the resin catalyst-extract (bark) system using the Kissinger-Akira-Sunose (KAS) model. The test results showed significant effect of free and / or bound bark acids on the curing process of the resin and pointed to their buffering action in the polymerization process.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:108:110064
Study programmeTitle: Wood Technology Processes
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra inženjer/inženjerka drvne tehnologije (magistar/magistra inženjer/inženjerka drvne tehnologije)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
RepositoryUniversity of Zagreb Faculty of Forestry and Wood Technology
Created on2020-09-21 14:06:50

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