Original scientific paper

https://doi.org/10.5552/drind.2014.1321

Properties of Liquid and Polycondensed UF Resin Modified with pMDI

Dorota Dziurka orcid.org/0000-0001-6197-7825 ; Faculty of Wood Technology, Poznań University of Life Sciences, Poznań, Poland
Radosław Mirski orcid.org/0000-0002-4881-579X ; Faculty of Wood Technology, Poznań University of Life Sciences, Poznań, Poland

Abstract

The aim of this study was to determine the properties of liquid and cured UF (urea-formaldehyde) resin modified with pMDI (polymeric 4, 4′-methylenediphenyl isocyanate). Analyses showed that when introduced to liquid UF resin already at 10 %, its reactivity increases, which is reflected in a shortening of gel time and reduction of activation energy of the polycondensation process. In turn, analyses performed on polycondensed resin showed that, thanks to modification with pMDI, its hydrophobicity is considerably improved, as manifested in a reduction of absorbability and swelling in thickness of cured resin.

Keywords

UF; pMDI; hybrid resin; FTIR; hydrophobicity

Hrčak ID:

123167

URI

https://hrcak.srce.hr/123167

Publication date:

18.6.2014.

Article data in other languages: croatian

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