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Lepljenje lesa z mešanicami iz poliestra na osnovi utekočinjenega lesa in MUF lepila z visokofrekvenčnim segrevanjem : diplomski projekt = Wood bonding using high frequency heated mixtures based on polyester from liquefied wood and melamine urea formaldehyde adhesives : B. Sc. thesisNastav, JožkoZ dodajanjem različnih deležev poliestra iz utekočinjenega lesa (PUL) melamin-urea-formaldehidnemu (MUF) lepilu smo želeli raziskati, koliko PUL lahko dodamo lepilu, da le to še izpolnjuje zahteve ... standarda EN 12765. Po tem standardu so lepila za nekonstrukcijsko uporabo razvrščena v 4 trajnostne razrede (C1, C2, C3, C4). MUF lepilu smo dodali 0, 10, 20, 30, 40, 50 % PUL. S pomočjo visoke frekvence smo zlepili bukove lamele, ki smo jih po lepljenju razžagali v strižne preizkušance, kot to predpisuje standard EN 205. Testiranje smo opravili na univerzalnem testirnem stroju ZWICK/Z005. Lepilnim mešanicam smo izmerili tudi dielektrične lastnosti. Ugotovili smo, da najvišje strižne trdnosti dosegajo tisti preizkušanci, ki so bili 7 dni po lepljenju izpostavljeni standardni klimi. Vrednosti pri teh preizkušancih so se gibale nad 10 N/mm2. Pri ocenjevanju loma po lesu smo zasledili, da manjše količine dodanega PUL lahko prispevajo k boljši trdnosti lepilnega spoja. Preizkušanci, ki smo jih tekom raziskave izpostavili vodi, so dosegali nižje strižne trdnosti. Preizkušanci, zlepljeni z lepilnimi mešanicami z več dodanega PUL ter za 3 ure izpostavljeni vodi (100 % 2°C) pa so razpadliType of material - undergraduate thesis ; adult, seriousPublication and manufacture - Ljubljana : [J. Nastav], 2015Language - slovenianCOBISS.SI-ID - 2407305
Author
Nastav, Jožko
Other authors
Šernek, Milan |
Kunaver, Matjaž |
Šega, Bogdan
Topics
lepilni spoj |
poliester |
utekočinjen les |
strižna trdnost |
dielektrične lastnosti |
adhesive bond |
polyester |
liquefied wood |
shear strength |
dielectric properties
Library/institution |
City | Acronym | For loan | Other holdings |
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BF, Department of Wood Science and Technology, Lj. | Ljubljana | BFLES |
reading room 1 cop.
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Shelf entry
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Year | Impact factor | Edition | Category | Classification | ||||
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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DRS, in which the journal is indexed
Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Nastav, Jožko | |
Šernek, Milan | 16382 |
Kunaver, Matjaž | 11733 |
Šega, Bogdan | 13057 |
Source: Personal bibliographies
and: SICRIS
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