The synthesis and curing kinetics study of a new fluorinated polyurethane with fluorinated side chains attached to soft blocks

Wang, Xia; Li, Zan; Bi, Wei; Li, Ying; Qi, Yuanchun; Qi-wu, Dong

doi:10.1039/c5nj01772f

Cited by 14 publications

(7 citation statements)

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“…The more amorphous PU, the higher its flexibility [26]. As shown in figure 4(a), samples of PU, films exhibited a diffraction peak at approximately 2θ=20°, which was consistent with the results reported in the literature [27,28]. Compared with PU films, the diffraction peak of LPU and MLPU films shifted to higher or lower, which was caused by the complex structure of lignin.…”

Section: Xrd and Dscsupporting

confidence: 88%

Modification of lignin by hexamethylene diisocyanate to synthesize lignin-based polyurethane as an organic polymer for marine polyurethane anticorrosive coatings

et al. 2022

Mater. Res. Express

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A green and facile preparation was used to synthesize modified lignin (ML) from alkaline lignin by using hexamethylene diisocyanate (HDI) as the modifier and tetrahydrofuran as the solvent without a catalyst. Then, the as-synthesized ML was dispersed in hydroxy acrylic resin and used to prepare modified lignin-based polyurethane composites by using HDI trimer as the curing agent and dibutyltin dilauric acid as the catalyst at room temperature. Fourier transform infrared (FTIR) and elemental analysis confirmed that the main chemical in ML was lignin urethane when the amount of HDI was 0.2 g. The tensile strength of the modified lignin-based polyurethane (MLPU-0.2) film using ML-0.2 reached 12.07 MPa, which was improved by 23.2% and 68.3% compared with that of the pure polyurethane (PU) film (9.79 MPa) and lignin-based polyurethane (LPU) film prepared using unmodified lignin (7.17 MPa), respectively. After the addition of lignin or ML, the elongation at break of the polyurethane film increased. The water contact angle of MLPU-0.2 increased up to 96o, which was higher than that of PU (74o) and LPU (68o). The pencil hardness of MLPU-0.2 (3 H) was higher than that of PU (H) and LPU (2 H). Modified lignin-based polyurethane shows promise for marine anticorrosive coatings.

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Section: Xrd and Dscsupporting

confidence: 88%

Modification of lignin by hexamethylene diisocyanate to synthesize lignin-based polyurethane as an organic polymer for marine polyurethane anticorrosive coatings

et al. 2022

Mater. Res. Express

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“…Figure shows the XRD patterns of WPU, WFPU‐6, WFPU‐9 and WFPU‐12. The maximum peak position for all samples was observed near 2 θ = 19° arising from micro‐crystallinity in the hard domains . Moreover, the diffraction patterns were similar.…”

Section: Resultsmentioning

confidence: 67%

“…In comparison to WPU and WFPU‐6, it was observed that the fractured surfaces of WFPU‐9 and WFPU‐12 films obviously presented particles. The formation of particles from the hard segments was associated with the strong hydrogen bonding between CO and NH, which resulted in an increase of microphase separation between the soft and hard segments . With an increase of HTPFMA main‐chain length, stronger hydrogen bonds were formed in hard segments as discussed with the FTIR analysis, leading to an increase of the interaction of hard segments and the formation of more regular shaped particles .…”

Section: Resultsmentioning

confidence: 84%

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Effect of hydroxyl‐terminated poly(fluoroalkyl methacrylate) main‐chain length on the microphase separation of waterborne fluorinated polyurethane

Yang

Pan

Wang

et al. 2018

Polymer International

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Waterborne fluorinated polyurethanes (WFPUs) based on hydroxyl‐terminated poly(fluoroalkyl methacrylate)s (HTPFMAs) with different main‐chain lengths were synthesized. The structure of HTPFMA was characterized using 1H NMR spectroscopy, measurements of hydroxyl values and gel permeation chromatography. The microstructures of WFPUs were investigated using Fourier transform infrared spectroscopy, which indicated that hydrogen bonding interactions in hard segments of WFPUs were enhanced by the introduction of HTPFMA and increased with increasing main‐chain length of HTPFMA. The results of X‐ray diffraction demonstrated that increasing the main‐chain length of HTPFMA resulted in an increase of crystallinity in hard segments. Differential scanning calorimetry revealed that the melting temperature of micro‐crystallites in hard segments and the microphase separation increased with an increase of HTPFMA main‐chain length. Dynamic mechanical analysis and scanning electron microscopy also confirmed that HTPFMA with longer main‐chain length can promote the extent of microphase separation of WFPUs between soft and hard domains. The mechanical properties of WFPUs were improved due to the increase of microphase separation with increasing HTPFMA main‐chain length. © 2018 Society of Chemical Industry

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“…Under certain conditions, the hard segments in the PU chain segments will aggregate together to form crystalline micro-regions, which can be characterized by X-ray diffraction (XRD). 23,24 Fig. 4a and b presents the XRD patterns of PU and PU-PNIPAm n lms.…”

Section: Preparation Of Pu-pnipam N Composite Materialsmentioning

confidence: 99%

Synthesis of temperature- and humidity-induced dual stimulation film PU-PNIPAm_n and its independent film formation as a smart window application

Tian

Jin

et al. 2023

RSC Adv.

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The synthesis and curing kinetics study of a new fluorinated polyurethane with fluorinated side chains attached to soft blocks

Abstract: Fluorinated polyurethane with fluorinated side chains attached to soft blocks was successfully synthesized, which exhibited unique properties. And also the curing kinetics was studied using a rotational rheometer.

Cited by 14 publications

References 50 publications

Modification of lignin by hexamethylene diisocyanate to synthesize lignin-based polyurethane as an organic polymer for marine polyurethane anticorrosive coatings

Modification of lignin by hexamethylene diisocyanate to synthesize lignin-based polyurethane as an organic polymer for marine polyurethane anticorrosive coatings

Effect of hydroxyl‐terminated poly(fluoroalkyl methacrylate) main‐chain length on the microphase separation of waterborne fluorinated polyurethane

Synthesis of temperature- and humidity-induced dual stimulation film PU-PNIPAm_n and its independent film formation as a smart window application

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The synthesis and curing kinetics study of a new fluorinated polyurethane with fluorinated side chains attached to soft blocks

Abstract: Fluorinated polyurethane with fluorinated side chains attached to soft blocks was successfully synthesized, which exhibited unique properties. And also the curing kinetics was studied using a rotational rheometer.

Cited by 14 publications

References 50 publications

Modification of lignin by hexamethylene diisocyanate to synthesize lignin-based polyurethane as an organic polymer for marine polyurethane anticorrosive coatings

Modification of lignin by hexamethylene diisocyanate to synthesize lignin-based polyurethane as an organic polymer for marine polyurethane anticorrosive coatings

Effect of hydroxyl‐terminated poly(fluoroalkyl methacrylate) main‐chain length on the microphase separation of waterborne fluorinated polyurethane

Synthesis of temperature- and humidity-induced dual stimulation film PU-PNIPAmn and its independent film formation as a smart window application

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Synthesis of temperature- and humidity-induced dual stimulation film PU-PNIPAm_n and its independent film formation as a smart window application