High <i>cis</i>-1,4 Hydroxyl-Terminated Polybutadiene-Based Polyurethanes with Extremely Low Glass Transition Temperature and Excellent Mechanical Properties

Cao, Zhe; Zhou, Qinzhuo; Jie, Suyun; Li, Bo‐Geng

doi:10.1021/acs.iecr.5b04921

Cited by 48 publications

(30 citation statements)

References 40 publications

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“…At temperatures above 250 • C, it was observed the thermal degradation of the materials. As is known, polyurethanes have at least two-decomposition stages in their thermal degradation, where the first decomposition fraction (usually over 250 • C) in the polyurethanes chains is related to soft segments, which involve the thermolysis of urethane linkages, while the second decomposition fraction (usually over 350 • C) is related to the decomposition of macrodiol components and above 420 • C a gradual weight loss from continuous combustion of the polyurethane [20,21,26,[39][40][41][42][43][44].…”

Section: Thermal Analysis Of Pu-inumentioning

confidence: 99%

Synthesis and Characterization of Inulin-Based Responsive Polyurethanes for Breast Cancer Applications

et al. 2020

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In this study, new polyurethanes (PUs) were prepared by using inulin and polycaprolactone as polyols. Their structure and morphology were determined by Fourier transform infrared spectroscopy (FTIR), Raman dispersive spectroscopy, Nuclear magnetic resonance spectroscopy ( 1 H NMR and 13 C NMR), and scanning electron microscopy (SEM), whereas their mechanical properties were evaluated by a universal testing machine. Additionally, their water uptake, swelling behavior, and degradation were evaluated to be used as drug delivery carriers. Therefore, an anti-cancer drug was loaded to these PUs with 25% of loading efficiency and its release behavior was studied using different theoretical models to unveil its mechanism. Finally, the ability of the new PUs to be used as a clip marker in breast biopsy was evaluated. The results clearly demonstrate that these PUs are safe and can be used as intelligent drug release matrices for targeted drug delivery and exhibits positive results to be used for clip marker and in general for breast cancer applications.

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Section: Thermal Analysis Of Pu-inumentioning

confidence: 99%

Synthesis and Characterization of Inulin-Based Responsive Polyurethanes for Breast Cancer Applications

et al. 2020

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“…The thermograms and derivatives of the thermograms are shown in Figure . Data in Figure clearly show three degradation stages from 200 to 700 °C, which is similar to degradation of HTPB‐based PU . The initial degradation temperature at 5% weight loss ( T 5% ), temperature at 50% weight loss ( T 50% ), peak temperatures of three degradation stages ( T dmax ), and residue at 700 °C are shown in Table .…”

Section: Resultsmentioning

confidence: 55%

Hydrolysis‐resistant polyurethane elastomers synthesized from hydrophobic bio‐based polyfarnesene diol

Zhang

Chen

Yao

et al. 2019

J of Applied Polymer Sci

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Hydrolytic stability is an essential requirement for polyurethanes (PUs) that are used in highly humid and aqueous environments. In this study, hydrolysis‐resistant PU elastomers (PUEs) are synthesized based on hydrophobic bio‐based polyfarnesene diol (PFD), which contains unique “bottle brushes” structure (with long branched hydrocarbon side chains). The effect of hard segment (HS) content, ranging from 30 to 50%, on the morphology and properties of PUEs is investigated by Fourier transform infrared spectroscopy, thermogravimetric analysis, differential scanning calorimetry, X‐ray diffraction, scanning electron microscopy, tensile, water absorption, and contact angle measurements. The results show that there are prominent phase separations in the synthesized PUEs. The PUEs show a three‐stage degradation process and two Tg, one is at about −66 °C and the other 61 °C, which are related to the soft segment and HS, respectively. Water contact angles of PUEs increase from 98.6 to 105.2° with the increasing of PFD structural unit fraction. After being immersed in deionized water for 30 days, PUEs show no significant degradation of both tensile strength and elongation at break, and mass changes of all samples are less than 0.5%. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47673.

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“…Cao et al . proposed controlled oxidative chain scission of HCBR leading to polymer that has hydroxyl group on both chain ends . Some others offered approach of cross metathesis with functional vinyl compounds .…”

Section: Introductionmentioning

confidence: 99%

Synthesis and property of end‐functionalized poly(cis‐1,4‐butadiene) and its application to rubber compound

Ozawa

Takata

2019

J of Applied Polymer Sci

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This article describes the successful quasi-living polymerization of 1,3-butadiene (BD) to high cis content butadiene rubber (HCBR) and the terminal functionalization of HCBR for application to rubber compound. A catalyst system based on neodymium carboxylate and organoaluminum compounds was prepared and employed to polymerize BD. Polymerization resulted in mostly proportional growth of molecular weight to the conversion while maintaining molecular weight distribution in relatively narrow range. The reactivity of chain end after the completion of polymerization was confirmed by comparing UV absorbance of polymers before and after the addition of chromophore compound to the unterminated polymerization mixture, as measured with size exclusion chromatography (SEC). A variety of functionalizing agents, which can provide end-groups of polymer with potential affinity to silica surface, was explored. Among them, compounds with epoxy, ketone, and ketimine groups produced polymers with clear evidences of functionalization. The HCBR functionalized with epoxy-containing alkoxysilane compound was tested in silica-filled rubber compound and showed remarkable improvement of silica dispersity as seen by change of viscoelastic responses.

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High cis-1,4 Hydroxyl-Terminated Polybutadiene-Based Polyurethanes with Extremely Low Glass Transition Temperature and Excellent Mechanical Properties

Cited by 48 publications

References 40 publications

Synthesis and Characterization of Inulin-Based Responsive Polyurethanes for Breast Cancer Applications

Synthesis and Characterization of Inulin-Based Responsive Polyurethanes for Breast Cancer Applications

Hydrolysis‐resistant polyurethane elastomers synthesized from hydrophobic bio‐based polyfarnesene diol

Synthesis and property of end‐functionalized poly(cis‐1,4‐butadiene) and its application to rubber compound

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