Super stretchable chromatic polyurethane driven by anthraquinone chromogen as a chain extender

Zhao, Caiyun; Wang, Chaoxia; Wang, Youjiang; Yao, Donggang

doi:10.1039/c8ra06744a

Cited by 11 publications

(2 citation statements)

References 35 publications

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“…The hardness of PUE lms is affected by many factors such as the polarity of polar groups, hydrogen bonding and crosslinking density [21] . The -NCO index of the four PUEs synthesized in this paper is unchanged, with the same cross-linking density and unaffected hardness.…”

Section: Resultsmentioning

confidence: 99%

Effect of Soft Chain Types on Polycarbonate Diol-based Polyurethane Elastomers

Pang,

Zhang,

Zhong

et al. 2024

Preprint

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Polyurethane elastomers (PUEs) have been synthesized with polycarbonate diol synthesized from 1, 4-butanediol (C4PCDL) and 1, 6-butanediol (C6PCDL), polycaprolactone diol (PCL) as well as polytetrahydrofuran ether diol (PTMG) as soft segments respectively, with Isopharone diisocyanate (IPDI) and 1, 4-butanediol as hard segments. The PUEs composed of four different soft chains are called PUE1, PUE2, PUE3 and PUE4, whose structure, mechanical and thermal properties and light transmittance have been tested with the aim to analyze the effect of the structure of the soft chain on the properties. The experimental results indicate that PUEs successfully be synthesized with the prepolymer method. The stronger the polarity of the soft chains is, the greater the tensile strength, hardness and heat-resistant quality of the PUEs is. With the increase of the flexibility of the soft chain of the PUEs, its elongation at break will increase and Tg will decrease and the light transmittance of it is affected by the degree of phase separation. Specifically, the greater the degree of phase separation is, the lower the transmittance is. The tensile strength of PUE1 reaches 39.82 MPa, the hardness reaches 93.9 Shore A, and the Td5% reaches 308.9 ℃. Without this, its transmittance also reached 92.31%.

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Section: Resultsmentioning

confidence: 99%

Effect of Soft Chain Types on Polycarbonate Diol-based Polyurethane Elastomers

Pang,

Zhang,

Zhong

et al. 2024

Preprint

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show abstract

“…Figure 2b shows the XRD pattern of PU 0.4 . The peak near 2θ = 19.2 • should be the diffraction peak of the relatively regular crystal region composed of a soft segment, indicating that the sample was amorphous and there was a certain degree of microphase separation in this polyurethane [25]. It should be noted that the FTIR spectra and XRD patterns of the other four polyurethanes were similar to PU 0.4 , meaning that different ratios of chain extender to crosslinker did not affect the formation of carbamate groups.…”

Section: Structural Analysismentioning

confidence: 85%

A Study on the Preparation and Cavitation Erosion Mechanism of Polyether Polyurethane Coating

Wang

Hou

et al. 2022

Materials

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Polyurethane elastomers are anticipated to be applied in the field of cavitation erosion (CE) resistance, but their protection and damage mechanisms are not clear, which greatly restricts their further development. In this article, five polyether polyurethanes (PUx) with different crosslinking densities were prepared. Their mechanical properties, thermal properties, water absorption, surface morphology and chemical structure before and after CE tests were compared with ESEM, OM, TG-DSC, FTIR and XPS in detail. The results showed that with an increase in crosslinking density, the tensile strength of PUx increased first and then decreased, elongation at break and water absorption reduced gradually and thermal decomposition temperature and adhesion strength increased steadily. During the CE process, cavitation load aggravated the degree of microphase separation and made brittle hard segments concentrate on the coating surface; meanwhile, cavitation heat accelerated hydrolysis, pyrolysis, oxidation and the fracture of molecular chains. As a result, the mechano-thermal coupling intensified the formation and propagation of fatigue cracks, which should be the fundamental reason for the CE damage of polyurethane elastomer. PU0.4 exhibited the best CE resistance among the five coatings thanks to its good comprehensive properties and may find potential applications on the surface of hydraulic components.

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Preparation and Properties of Rosin-based Anthraquinone Fluorescent Waterborne Polyurethane

Lu,

Yu,

Cheng

et al. 2024

J Fluoresc

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Super stretchable chromatic polyurethane driven by anthraquinone chromogen as a chain extender

Abstract: PUEs introducing anthraquinone chromogen as chain extender exhibit superior mechanical and color properties. The improvement of elongation is most significant. BPUE1 and BPUE0.5 display high color strength and supreme rubbing and washing fastness.

Cited by 11 publications

References 35 publications

Effect of Soft Chain Types on Polycarbonate Diol-based Polyurethane Elastomers

Effect of Soft Chain Types on Polycarbonate Diol-based Polyurethane Elastomers

A Study on the Preparation and Cavitation Erosion Mechanism of Polyether Polyurethane Coating

Preparation and Properties of Rosin-based Anthraquinone Fluorescent Waterborne Polyurethane

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