Effects of ionic interactions between clay and waterborne polyurethanes on the structure and physical properties of their nanocomposite dispersions

Lee, Hsun-Tsing; Hwang, Jiunn-Jer; Liu, Hsin-Jiant

doi:10.1002/pola.21663

Cited by 28 publications

(14 citation statements)

References 35 publications

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“…Similar results were also found in previous reports. 41 However, the beginning of the degradation temperature for this step in the current study was much different, and the temperatures of PU0, PU4, PU8, and PU12 were 437, 449, 458, and 460 C, respectively, with the PU12 temperature much higher by about 23 C compared with that of PU0. These values suggested that the PU films with more POSS are more stable.…”

Section: Thermodynamicsmentioning

confidence: 51%

“…22 The peak at 1530 cm 21 is assigned to the NAH bending vibration present in the PU samples, and the bands at $1240 cm 21 can be collectively attributed to the ester CAOAC asymmetric stretching vibration. 23 The wide AA-POSS peak between 1078 and 1145 cm 21 is ascribed to SiAO stretching vibrations. 24 For the POSS=PU hybrids, this band unfortunately overlapped with that of the aliphatic ether.…”

Section: Articlementioning

confidence: 99%

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Novel phenyl‐POSS/polyurethane aqueous dispersions and their hybrid coatings

Zhang

et al. 2013

J of Applied Polymer Sci

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A facile and rapid preparation of 3-(2-aminoethylamino)propylheptaphenylPOSS (AA-POSS), a special phenyl-POSS that contains two functional amino groups (Scheme 1), is demonstrated by the corner-capping method. Then AA-POSS forms a series of novel phenyl-POSS=PU aqueous dispersions. The structure of AA-POSS has been confirmed by Si NMR, and ESI-MS. The POSS=PU hybrid films are studied by Fourier transform infrared spectrometer (FT-IR), gel permeation chromatography (GPC), scanning electron microscope (SEM), X-ray diffraction (XRD) spectra, differential scanning calorimetry (DSC) analysis, and thermal gravimetric analyzer (TGA). FT-IR and GPC are conducted to validate the chemical structure of the hybrid PU. The properties of hybrid films display significant changes with notable increases in T g , thermal properties, tensile strength, as well as surface hydrophobicity. These changes are attributed to the incorporation of novel POSS into PU. Moreover, these significant material property enhancements are achieved at low levels of POSS incorporation (only 4%).

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Section: Thermodynamicsmentioning

confidence: 51%

Section: Articlementioning

confidence: 99%

Novel phenyl‐POSS/polyurethane aqueous dispersions and their hybrid coatings

Zhang

et al. 2013

J of Applied Polymer Sci

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“…Polyurethane formation reaction was a more specific response, it had similarity with the polymerization reaction, when the reaction occurred, the system had no precipitation of low molecular, such as H 2 O or HCI [10] . However, there was some differences between polyurethane and polymer, that was, the main chain was not connected by the adjacent carbon atoms, but mixed with oxygen and nitrogen atoms, and reaction rules had consistent with condensation reaction.…”

Section: Synthesis Of Polyurethanementioning

confidence: 99%

Synthesis and characterization of polyurethane

Liu

Hao-xiong

et al. 2010

J. Wuhan Univ. Technol.-Mat. Sci. Edit.

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Polyurethane was synthesized by the copolymerization with isocyanate and diols. The structure and properties of the copolymers were characterized by infrared spectrometer (IR), differential scanning calorimetry (DSC) and thermogravimetry (TG). The rabbit blood samples was dripped on the polyurethane, which was prepared by drying and die, and the contact angle was measured by contact angle measurement, then infiltration phenomenon was observed by electron microscopy .The results showed that the contact angle of blood samples and polyurethane was decreased with increasing time, and the platelets on the polyurethane would gradually increase and more rules. Thus the polyurethane coating had good hydrophilic property and anticoagulant activity.

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“…However, several drawbacks existed in the process of synthesizing WPU when DMPA was used as chain extender. For example, additional organic solvents, such as N,N-dimethylformamide (DMF) [2] and N-methyl-2-pyrroli-done (NMP) [3][4][5][6][7][8][9] were needed to dissolve DMPA. NMP and DMF are very difficult to be completely removed from polyurethane matrix even after distillated in vacuum oven.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of waterborne polyurethane based on covalently bound dimethylol propionic acid to e-caprolactone based polyester polyol

Chen

2016

Progress in Organic Coatings

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Effects of ionic interactions between clay and waterborne polyurethanes on the structure and physical properties of their nanocomposite dispersions

Cited by 28 publications

References 35 publications

Novel phenyl‐POSS/polyurethane aqueous dispersions and their hybrid coatings

Novel phenyl‐POSS/polyurethane aqueous dispersions and their hybrid coatings

Synthesis and characterization of polyurethane

Synthesis and characterization of waterborne polyurethane based on covalently bound dimethylol propionic acid to e-caprolactone based polyester polyol

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