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Use of functionalized boehmite nanoparticles to improve the hardness and tribological properties of polyurethane films
Date
2018-01-13
Author
Eroglu, Gulden
Gündüz, Güngör
Çolak, Üner
MAVİŞ, BORA
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Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
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Plate-like boehmite nanoparticles (BH) produced from aluminum hydroxide by hydrothermal process were functionalized in one step with two different diisocyanates. The amount of free isocyanates that were available for polymerization reaction was determined to be higher in functionalization with the aromatic diisocyanate (diphenylmethane-4,4'-diisocyanate -MDI). In composite film production MDI functionalized BH (MDI-BH) was used. Polyurethane based nanocomposite films were produced through polymerization of non-functionalized and MDI-BH with two different polyester-polyols that were synthesized by the esterification of 1,4 butanediol with either adipic acid or phthalic anhydride. It was impossible to form films suitable for hardness and tribological tests with non-functionalized BH. Up to 1 wt% MDI-BH additions were effective in increasing the hardness and scratch resistance of films. The increases in abrasion resistance were more significant and followed the increasing trend for MDI-BH additions even up to 5 wt%. The highest increase, which was 400% with respect to the unmodified resin was observed with adipic acid based polyols and this result was obtained at MDI-BH content of 3 wt%.
Subject Keywords
Tribological properties
,
Film
,
Nanocomposite
,
Polyurethane
,
Nanoparticle
,
Boehmite
,
Functionalization
,
Diisocyanate
URI
https://hdl.handle.net/11511/57214
Journal
JOURNAL OF POLYMER RESEARCH
DOI
https://doi.org/10.1007/s10965-018-1442-5
Collections
Department of Chemical Engineering, Article
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G. Eroglu, G. Gündüz, Ü. Çolak, and B. MAVİŞ, “Use of functionalized boehmite nanoparticles to improve the hardness and tribological properties of polyurethane films,”
JOURNAL OF POLYMER RESEARCH
, pp. 0–0, 2018, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/57214.