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- W2028922346 abstract "Films from waterborne polyurethane (WPU) and carboxymethylated guar gum (CMGG) with different contents (20–80 wt%) were prepared through solution casting method, and then were crosslinked with calcium chloride. The effect of CMGG content on the miscibility, morphology and physical properties of the blend films is investigated by Fourier transform infrared spectroscopy, scanning electron microscopy, density measurements, differential scanning calorimetry, dynamic mechanical thermal analysis, thermogravimetric analysis, water sensitivity measurements, solvent-swelling and tensile tests. The results reveal that the uncrosslinked films exhibit good miscibility when CMGG content is lower than 60 wt%, whereas typical “sea-island” structure occurs when the CMGG content further increases. After crosslinking with calcium ion, the blend films form a relatively dense architecture, which leads to better miscibility, higher storage modulus and thermal stability. The crosslinked films also exhibit better tensile strength (11.6–56.5 MPa) and solvent-resistance than that of the uncrosslinked films over the entire composition range. A model describing the configuration of Ca2+-chelating structure was proposed to illustrate the different structures of the two series of the blend films." @default.
- W2028922346 created "2016-06-24" @default.
- W2028922346 creator A5008916749 @default.
- W2028922346 creator A5049221289 @default.
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- W2028922346 date "2006-11-01" @default.
- W2028922346 modified "2023-09-28" @default.
- W2028922346 title "Effects of Ca2+ crosslinking on structure and properties of waterborne polyurethane-carboxymethylated guar gum films" @default.
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- W2028922346 doi "https://doi.org/10.1016/j.carbpol.2006.04.001" @default.
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