Surface and mechanical properties of waterborne polyurethane films reinforced by hydroxyl-terminated poly(fluoroalkyl methacrylates)

Yang, Wei; Cheng, Xu; Wang, Haibo; Liu, Yuansen; Du, Zongliang

doi:10.1016/j.polymer.2017.11.021

Cited by 42 publications

(20 citation statements)

References 43 publications

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“…The stretching vibration peaks for amide II (δN–H + νC–N + νC–C) and III (νC–N, N–H bending, and C–Cα) are located at 1529 and 1234 cm −1 , respectively. These results are consistent with those in other reports [6,32]. This study conducted curve fitting of the C=O curve section (1620–1740 cm −1 ) to determine changes in the number of H-bonds and reveal the influence of adding CB to the WPU on H-bond interactions (Figure 2b).…”

Section: Resultssupporting

confidence: 91%

Synthetic Environmentally Friendly Castor Oil Based-Polyurethane with Carbon Black as a Microphase Separation Promoter

Tsen

Tsou

et al. 2019

Polymers

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This study created water polyurethane (WPU) prepolymer by using isophorone diisocyanate, castor oil, dimethylolpropionic acid, and triethanolamine (TEA) as the hard segment, soft segment, hydrophilic group, and neutralizer, respectively. TEA, deionized water, and carbon black (CB) were added to the prepolymer under high-speed rotation to create an environmentally friendly vegetable-oil-based polyurethane. CB served as the fortifier and promoter of microphase separation. Fourier transform infrared spectroscopy was performed to elucidate the role of H-bond interactions within the CB/WPUs. Additionally, atomic force microscopy was conducted to determine the influence of H-bond interactions on the degree of microphase separation in the WPU. Furthermore, this study used four-point probe observation to discover the materials’ conductivity of CB in the WPU. Thermogravimetric analysis and dynamic mechanical analysis were performed to measure the thermal properties of the CB/WPUs. The mechanical properties of CB/WPUs were measured using a tensile testing machine. The CB/WPUs were also soaked in 1 wt.% NaOH solution for different amounts of time to determine the degradation properties of the CB/WPUs. Finally, scanning electron microscopy was performed to observe the topography of the CB/WPUs after degradation.

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Section: Resultssupporting

confidence: 91%

Synthetic Environmentally Friendly Castor Oil Based-Polyurethane with Carbon Black as a Microphase Separation Promoter

Tsen

Tsou

et al. 2019

Polymers

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“…Figure 2b shows the absorption peak within the wavenumber range of 1900–1000 cm −1 . FTIR analysis conducted by Yang et al [27] showed that C=O functional groups obtained from the PU system using the curve-fitting technique included C=O free , C=O HB disordered , and C=O HB ordered , with C=O HB ordered appearing at approximately 1724, 1701, and 1660 cm −1 . Wang et al [28] subjected FPU to an FTIR test, and the data indicated that when the C=O and –NH functional groups appeared at three peaks (free, disordered, and ordered) in the curve fitting, C–O and C–F functional groups produced two peak values (free and HB).…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Properties of Novel Polyurethanes Containing Long-Segment Fluorinated Chain Extenders

Lee

Tsai

et al. 2018

Polymers

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In this study, novel biodegradable long-segment fluorine-containing polyurethane (PU) was synthesized using 4,4′-diphenylmethane diisocyanate (MDI) and 1H,1H,10H,10H-perfluor-1,10-decanediol (PFD) as hard segment, and polycaprolactone diol (PCL) as a biodegradable soft segment. Nuclear magnetic resonance (NMR) was used to perform 1H NMR, 19F NMR, 19F–19F COSY, 1H–19F COSY, and HMBC analyses on the PFD/PU structures. The results, together with those from Fourier transform infrared spectroscopy (FTIR), verified that the PFD/PUs had been successfully synthesized. Additionally, the soft segment and PFD were changed, after which FTIR and XPS peak-differentiation-imitating analyses were employed to examine the relationship of the hydrogen bonding reaction between the PFD chain extender and PU. Subsequently, atomic force microscopy was used to investigate the changes in the microphase structure between the PFD chain extender and PU, after which the effects of the thermal properties between them were investigated through thermogravimetric analysis, differential scanning calorimetry, and dynamic mechanical analysis. Finally, the effects of the PFD chain extender on the mechanical properties of the PU were investigated through a tensile strength test.

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“…HTPFMA was provided by our laboratory. The details about the preparation of HTPFMAs were reported in our previous paper . The main chain repeat units of HTPFMA was about six determined by 1 H‐NMR which corresponding the ratio of 1H, 1H, 7H‐dodecafluoroheptyl methacrylate, and 2‐sulfanylethanol (β‐ME).…”

Section: Methodsmentioning

confidence: 99%

Effect of crosslinking on the surface free energy and surface reorganization of waterborne fluorinated polyurethane

Yang

et al. 2018

J of Applied Polymer Sci

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To endow waterborne fluorinated polyurethanes (WFPUs), films with stable lower surface free energy and lower surface reorganization after the films contacted with water, a series of crosslinked WFPUs (CWFPUs) emulsions were prepared by adjusting the content of aziridine (AZ). The effect of crosslinking on the surface free energy, glass-transition temperature (T g ), water absorption, and surface composition of dry/hydrated WFPUs and CWFPUs films were studied by CAs test, dynamic mechanical analysis, water absorption measurements, and X-ray photoelectron spectroscopy. When the fluorine content was 0.5%, the surface free energy of the CWFPUs films modified by 0.4% AZ content (CWFPU-6-0.5-CK0.4) reached to the lowest value of 15.76 mN m −1 which almost equaled to the surface free energy (15.45 mN m −1 ) of the dry uncrosslinked films (WFPU-6-0.5). With the increasing of AZ content, the T g, hard of hard segments of the CWFPUs films increased and the water absorption of the CWFPUs films decreased, which suggested the formation of the crosslinked network structures. The studies of the surface elements and groups composition of dry/hydrated WFPUs and CWFPUs both confirmed that the surface reorganization and the migration of fluorinated side chains were restricted by the crosslinked network structures.

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Surface and mechanical properties of waterborne polyurethane films reinforced by hydroxyl-terminated poly(fluoroalkyl methacrylates)

Cited by 42 publications

References 43 publications

Synthetic Environmentally Friendly Castor Oil Based-Polyurethane with Carbon Black as a Microphase Separation Promoter

Synthetic Environmentally Friendly Castor Oil Based-Polyurethane with Carbon Black as a Microphase Separation Promoter

Synthesis and Properties of Novel Polyurethanes Containing Long-Segment Fluorinated Chain Extenders

Effect of crosslinking on the surface free energy and surface reorganization of waterborne fluorinated polyurethane

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