Preparation and Properties of Castor Oil-Based Waterborne Polyurethane Terminated

Hong, Wei; Li, Qing Shan; Yu, Wei; Sun, Jing; Liu, Jun; Xing, Guang Zhong

doi:10.4028/www.scientific.net/amr.427.98

Cited by 4 publications

(6 citation statements)

References 4 publications

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“…Besides, there is no hydroxyl absorption peak of CO at 3429 cm À 1 , which proves that it has already participated in the reaction. [37,38] The above results confirmed the successfully synthesis of WPU and CWPU. Figure 4 displays the XRD patterns in the range of 2θ = 5 ∼ 80°f or CWPU with different PBA/CO soft chain ratios.…”

Section: Resultssupporting

confidence: 75%

“…The absorption peak of the range of 1000∼1300 cm −1 can be attributed to the tensile vibration of C−O−C, of which 1136 cm −1 is the vibration absorption peak of the ether group (C−O−C) in polyethylene glycol monomethyl ether (N120). Besides, there is no hydroxyl absorption peak of CO at 3429 cm −1 , which proves that it has already participated in the reaction [37,38] . The above results confirmed the successfully synthesis of WPU and CWPU.…”

Section: Resultssupporting

confidence: 66%

“…The pure WPU film takes polyester polyol as the soft segment, which is decomposed into small molecules in this stage. However, the CO is mainly accustomed as the soft segment in the CWPU film, which is decomposed into larger molecular weight olefins and paraffin at higher temperature [38] . The soft sections of CWPU5 and CWPU6 have more CO content and more residual amount, resulting in slow decomposition compared with other samples, but the pyrolysis trends of all samples are consistent.…”

Section: Resultsmentioning

confidence: 91%

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Synthesis of Castor Oil‐Based Waterborne Polyurethane with Improved Properties via Adjusting PBA/CO Soft Segment Ratio

et al. 2020

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In this study, dimethylol propionic acid (DMPA) and ethoxylated polymer diol (N120) are incorporated as composite hydrophilic groups to synthesize a series of castor oil‐based waterborne polyurethane (CWPU) nano‐emulsions. The properties of the nano‐emulsions with different ratio of polybutylene adipate (PBA) and castor oil (CO) soft segments as well as their film are investigated systematically. Fourier infrared spectroscopy (FTIR) confirms that CO was successfully introduced into the waterborne polyurethane (WPU) structure. The result indicates that the maximum contact angle of the film is 75.51° with a 7/3 molar ratio of PBA/CO. Thermal Gravimetric Analyzer (TGA) and Dynamic thermomechanical analysis (DMA) tests show that the thermal stability of the films has gradually improved with the increase of castor oil content. The content of castor oil in CWPU also affects the mechanical properties of the film. The tensile strength of the film reaches 23.2 MPa, and the elongation at break is 1460.7 %, when the molar ratio of PBA/CO is 9/1. Atomic force microscopy (AFM) is used to express the surface morphology of CWPU films. The films surface become rougher due to the introduction of CO. This work combines castor oil and water‐based systems to provide a relatively simple preparation method to synthesize CWPU nano‐emulsions, which can be used in environmental protection coatings and adhesives, and has broader application prospects.

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Section: Resultssupporting

confidence: 75%

Section: Resultssupporting

confidence: 66%

Section: Resultsmentioning

confidence: 91%

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Synthesis of Castor Oil‐Based Waterborne Polyurethane with Improved Properties via Adjusting PBA/CO Soft Segment Ratio

et al. 2020

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“…The small peak in the range of 1300 ~ 1500 cm −1 is associated with the bending vibration in the CH plane. 1136 cm −1 is the vibration absorption peak of the ether group (COC) in polyethylene glycol monomethyl ether (N120) 30,31 . The absorption peak around 1040 cm‐1 may be caused by the tensile vibration of the SiOSi bond, 23,32 and XPS test is required to further verify that KH550 is introduced into the CWPU.…”

Section: Resultsmentioning

confidence: 99%

Environmentally friendly plant‐based waterborne polyurethane for hydrophobic and heat‐resistant films

Wang

Zhang

Shi

et al. 2022

J of Applied Polymer Sci

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Waterborne polyurethane (WPU) is an environmentally friendly material using water as dispersion medium. However, it is significantly restricted that most of the soft segments in WPUs come from oil. In this work, environmentally friendly and low‐cost castor oil is used as the soft segment of polyurethane, and KH550 modification could improve the thermal stability and flexibility of CWPU. The results show that the particle size of the modified CWPU nano‐emulsion gradually increased to 60.48 nm. Through FTIR and XPS analysis, KH550 is successfully introduced into the castor oil‐based waterborne polyurethane system. After the CWPU‐3% film is treated with NaCl, NaOH, HCl solution and high temperature, the groups in the system remain unchanged which shows CWPU‐3% film having good chemical resistance and high temperature resistance. When the addition amount of KH550 is 3%, the maximum contact angle of the CWPU film was 92.39° which reveals good hydrophobic property. The tensile strength of the films increased from 10.2 MPa to 12.8 MPa, and the elongation at break decreased from 841.3% to 658.9%. The thermal stability of the CWPU films modified by KH550 were also improved. The modified CWPU film has excellent hydrophobicity, chemical resistance and temperature resistance.

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“…The reason is that the abundance of hydroxyl groups in GG macromolecular chain provides opportunities to form more urethane bonds through the reaction of the OH groups of GG with the NCO groups of IPDI, thereby leading to the increase of the crosslink density and the viscosity of the system. Thus PU molecular chains are not easy to move and the migration of hydrophilic groups to the surface of particles is hindered, resulting in the increase of the particle size . Furthermore, the GWPU emulsion had the good storage stability, and there was no precipitate at room temperature for 6 months.soft segments in polyurethane.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Properties of Waterborne Polyurethane Modified with Guar Gum Polysaccharide

Zhou

et al. 2020

ChemistrySelect

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Guar gum modified waterborne polyurethane (GWPU) was synthesized by the prepolymerization method using guar gum (GG) as an internal crosslinking agent. The influence of the GG content on emulsion and film properties was investigated. The Fourier transform infrared (FT-IR) results showed GG was successfully introduced into the polyurethane. The emulsion particles presented spherical morphology with an average diameter of about 40 nm characterized by transmission electron microscopy (TEM). The particle size increased with the increase of the amount of GG using dynamic laser scattering (DLS). The tensile strength of GWPU film was increased by 31.8% when the incorporated content of GG was only 0.3 wt%. With increasing GG content, the elongation at break and crystallinity of GWPU film decreased. The thermal stability increased initially as GG content increased, then decreased. Furthermore, the water resistance of GWPU was observably improved.

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Preparation and Properties of Castor Oil-Based Waterborne Polyurethane Terminated

Cited by 4 publications

References 4 publications

Synthesis of Castor Oil‐Based Waterborne Polyurethane with Improved Properties via Adjusting PBA/CO Soft Segment Ratio

Synthesis of Castor Oil‐Based Waterborne Polyurethane with Improved Properties via Adjusting PBA/CO Soft Segment Ratio

Environmentally friendly plant‐based waterborne polyurethane for hydrophobic and heat‐resistant films

Synthesis and Properties of Waterborne Polyurethane Modified with Guar Gum Polysaccharide

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