Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 498616
Title Poly(hydroxy urethane)s based on renewable diglycerol dicarbonate
Author(s) Velthoven, Juliën L.J. van; Gootjes, Linda; Es, Daan S. van; Noordover, Bart A.J.; Meuldijk, Jan
Source European Polymer Journal 70 (2015). - ISSN 0014-3057 - p. 125 - 135.
DOI http://dx.doi.org/10.1016/j.eurpolymj.2015.07.011
Department(s) FBR Sustainable Chemistry & Technology
VLAG
Publication type Refereed Article in a scientific journal
Publication year 2015
Keyword(s) Biobased - Diglycerol dicarbonate - Isocyanate-free - NMR - Poly(hydroxy urethane) - Thermal properties
Abstract

Abstract In this paper, we present a series of amorphous non-isocyanate poly(hydroxy urethane)s (PHU) synthesized from diglycerol dicarbonate in bulk conditions at mild temperatures, without using a catalyst. Diglycerol dicarbonate has been synthesized from diglycerol and dimethyl carbonate and was subsequently reacted with various diamines to form PHUs. These fully bio-based PHUs were amorphous and displayed a broad range of Tg values i.e. from -7 to 66 °C. 1D and 2D NMR techniques were used to determine the ratio between primary and secondary hydroxyl groups formed along the PHU backbone, which was found to be 31:69 for all compositions. The number-average molecular weights were calculated from NMR data and range from 4100 to 9400 g/mol. In FTIR spectra, residual cyclic carbonate groups were observed, which is in agreement with the loss of diamine as detected by NMR. TGA analysis indicated that the polymers are stable up to 200 °C. The polymers synthesized are expected to perform well in e.g. coating applications, given their molecular and thermal properties as well as the abundance of reactive hydroxyl functionalities present along the PHU backbone, which can be used for curing purposes and/or further functionalization.

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