Next Article in Journal
Development of Coffee Biochar Filler for the Production of Electrical Conductive Reinforced Plastic
Previous Article in Journal
Synthesis of Bisphenol A Based Phosphazene-Containing Epoxy Resin with Reduced Viscosity
Open AccessArticle

Effect of DMPA and Molecular Weight of Polyethylene Glycol on Water-Soluble Polyurethane

School of Chemical Engineering and Materials Science, Chung-Ang University, Seoul 156-756, Korea
*
Author to whom correspondence should be addressed.
Polymers 2019, 11(12), 1915; https://doi.org/10.3390/polym11121915 (registering DOI)
Received: 22 October 2019 / Revised: 13 November 2019 / Accepted: 19 November 2019 / Published: 21 November 2019
(This article belongs to the Special Issue Advances in Functional Polyurethanes)
In this study water-soluble polyurethane (WSPU) was synthesized from isophorone diisocyanate (IPDI), and polyethylene glycol (PEG), 2-bis(hydroxymethyl) propionic acid or dimethylolpropionic acid (DMPA), butane-1,4-diol (BD), and triethylamine (TEA) using an acetone process. The water solubility was investigated by solubilizing the polymer in water and measuring the contact angle and the results indicated that water solubility and contact angle tendency were increased as the molecular weight of the soft segment decreased, the amount of emulsifier was increased, and soft segment to hard segment ratio was lower. The contact angle of samples without emulsifier was greater than 87°, while that of with emulsifier was less than 67°, indicating a shift from highly hydrophobic to hydrophilic. The WSPU was also analyzed using Fourier transform infrared spectroscopy (FT-IR) to identify the absorption of functional groups and further checked by X-ray photoelectron spectroscopy (XPS). The molecular weight of WSPU was measured using size-exclusion chromatography (SEC). The structure of the WSPU was confirmed by nuclear magnetic resonance spectroscopy (NMR). The thermal properties of WSPU were analyzed using thermogravimetric analysis (TGA), and differential scanning calorimetry (DSC).
Keywords: water-soluble polyurethane; molecular weight; thermal properties; contact angle water-soluble polyurethane; molecular weight; thermal properties; contact angle
Show Figures

Graphical abstract

MDPI and ACS Style

Wondu, E.; Oh, H.W.; Kim, J. Effect of DMPA and Molecular Weight of Polyethylene Glycol on Water-Soluble Polyurethane. Polymers 2019, 11, 1915.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop