Affect of polydispersity on the properties of waterborne polyurethane dispersions based on polycarbonate polyol

Effects of crosslinking on adhesion behavior of waterborne polyurethane ink binder

“…2. As can be observed from the X-ray diffraction patterns, all the diffractograms are similar with a large broad diffraction peak around 19.7 • (main diffraction peak) and a small broad diffraction peak around 42.4 • , characteristic of the soft segments in PU [31][32][33], indicating an amorphous structure, which meets the crystallinity requirement of WPU ink binder. Moreover, the intensity of the diffraction peak around 19.7 • decreases with increasing TMP content, implying that the crystallinity of WPU films gradually decreases.…”

Polyurethane/aromatic polyamide sulfone copolymer dispersions from transesterified castor oil

“…The =C-H bending occurs at *875 cm -1 . Figure 7 shows the curve-fitting spectra in the carbonyl region of PUCON30-co-APAS, PUCON60-co-APAS, PUCON90-co-APAS and PUCON120-co-APAS, respectively, and their curve-fitting assignments are presented in Tables 3, 4 [45][46][47][48][49]. It can be noticed from the Fig.…”

Role of the interactions between carbonate groups on the phase separation and properties of waterborne polyurethane dispersions prepared with copolymers of polycarbonate diol

“…8) show two main diffraction peaks at 2Â values of 20 • (main diffraction peak) and 43 • , which correspond to the scattering from polyurethane chains with regular interplanar spacing, i.e. the soft segments in the segmented polyurethanes [7,10,35]. A third diffraction peak at 2Â value below 5 • is apparent but it was not assigned because it was incomplete in the range of 2Â values studied.…”

“…PUD consists in linear thermoplastic the ionic groups [2]. Recent studies [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] demonstrated that the ionic group content, solids content, segmented structure, molecular weight of the polyol, the type of chain extender and the hard/soft segments ratio determined the PUDs properties. However, there are few studies dealing with the influence of the composition of copolymers of polycarbonate diol on the properties of the polyurethanes [21][22][23][24][25] and, to the best of our knowledge, there are few publications dealing with polyurethane dispersions [22,26,27].…”