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Characterisation of melamine formaldehyde microspheres synthesised with prolonged microencapsulated reaction time
ID
Leskovšek, Mirjam
(
Avtor
),
ID
Kortnik, Jože
(
Avtor
),
ID
Stanković Elesini, Urška
(
Avtor
),
ID
Šumiga, Boštjan
(
Avtor
)
PDF - Predstavitvena datoteka,
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(1,62 MB)
MD5: 50A9FA17A5DFF1B09ABDE194D5132CE9
URL - Izvorni URL, za dostop obiščite
https://www.degruyter.com/document/doi/10.1515/polyeng-2021-0289/html
Galerija slik
Izvleček
The aim of the research was to identify the influence of different microencapsulated reaction time on the morphology, size, infrared spectral, thermal and micromechanical properties of melamine formaldehyde microspheres, synthesised with modified in situ polymerisation. Microspheres are microencapsulated particles with a blurred boundary of the core and shell due to their same composition. The synthesis of microspheres was paused after 1, 3, 9 and 15 h, and stopped after 23 h. The scanning electron microscopy and granulometric analysis were used to study the morphology and size of microspheres. Regardless of the reaction time, the produced microspheres were spherical in shape and with a rough surface. The average size of microspheres was almost identical (0.709–0.790 µm), while the volume size distribution curve of the particles became narrower with prolonged reaction time. The curing mechanism of melamine formaldehyde resin was studied using the Fourier-transform infrared spectroscopy and thermal analysis, and nano-indentation identification. The results revealed a slightly more crosslinked structure: with minimal (neglected) increased thermal weight loss (only up to 0.5%) and minor increased Young’s modulus (up to 2.3%). Using a nano-indenter, the hardness of synthesised particles improved by up to 14.8% after 23 h reaction time.
Jezik:
Angleški jezik
Ključne besede:
characterisation
,
curing
,
melamine formaldehyde resin
,
microsphere
,
reaction time
Vrsta gradiva:
Članek v reviji
Tipologija:
1.01 - Izvirni znanstveni članek
Organizacija:
NTF - Naravoslovnotehniška fakulteta
Status publikacije:
Objavljeno
Različica publikacije:
Objavljena publikacija
Leto izida:
2022
Št. strani:
Str. 288–297
Številčenje:
Vol. 42, iss. 4
PID:
20.500.12556/RUL-143845
UDK:
677
ISSN pri članku:
2191-0340
DOI:
10.1515/polyeng-2021-0289
COBISS.SI-ID:
97846019
Datum objave v RUL:
13.01.2023
Število ogledov:
730
Število prenosov:
94
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Objavi na:
Gradivo je del revije
Naslov:
Journal of polymer engineering
Skrajšan naslov:
J. polym. eng.
Založnik:
De Gruyter
ISSN:
2191-0340
COBISS.SI-ID:
54975235
Licence
Licenca:
CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
Povezava:
http://creativecommons.org/licenses/by/4.0/deed.sl
Opis:
To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.
Sekundarni jezik
Jezik:
Slovenski jezik
Ključne besede:
karakterizacija
,
zamreževanje
,
melamin formaldehidna smola
,
mikrosfere
,
reakcijski čas
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