Synthesis of poly(1,2-butylene oxide-stat-tetrahydrofuran) by controllable polymerization over Sc(OTf)3 for use in high-performance lubricating oil

Zeng, Xianqiang; Wang, Liguo; Cao, Yan; Liu, Chen; Han, Ziqiang; He, Peng; Li, Huiquan

doi:10.1016/j.eurpolymj.2022.111483

Cited by 3 publications

(3 citation statements)

References 62 publications

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“…PG- co -PBO was synthesized via solvent-free bulk ring-opening polymerization of G and BO, while PG was synthesized under the same conditions without adding BO (Scheme ). − The structures of PG- co -PBO and PG were confirmed by 1 H nuclear magnetic resonance spectroscopy ( 1 H NMR, Figure S1a), diffusion ordered spectroscopy (DOSY, Figure S1b), and matrix-assisted laser desorption and ionization time-of-flight mass spectrometry (MALDI-TOF, Figure S1c and d). Moreover, the differential scanning calorimetry curves ( DSC, Figure S2) exhibited a single glass transition temperature ( T g ), which indicates successful copolymerization without any phase separation between the G and BO monomers.…”

Section: Resultsmentioning

confidence: 95%

Solvent-Free and Recyclable Polyether/Polyphenol Supramolecular Adhesives with Robust, Water- and Low-Temperature-Resistant Properties

Zeng,

Wang,

Cao

et al. 2024

ACS Appl. Polym. Mater.

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Adhesives are widely used in everyday life; however, traditional polymer adhesives pose unavoidable hazards to the environment and living organisms due to their extensive use of toxic organic solvents, heavy reliance on fossil resources as synthetic raw materials, and lack of recyclability. Furthermore, they are incapable of maintaining a stable adhesion performance in harsh conditions. In this work, we present a facile yet powerful noncovalent bonding strategy for successfully constructing poly(glycidol-co-1,2-butylene oxide)/tannic acid supramolecular adhesives (PG-co-PBO/TA SAs) through hydrogen-bonding interactions between hyperbranched PG-co-PBO and natural TA. The SAs demonstrate an adhesion strength of 2.15 MPa at ambient temperature and maintain an adhesion strength of 1.53 MPa even at −196 °C. Moreover, it can be easily recycled through thermal treatment and retains stable adhesion strength even after undergoing multiple recycling cycles. The investigation of the structure–property relationship of SAs and molecular dynamics simulations has clarified that short alkyl chains of PG-co-PBO effectively protect the hydrogen-bonding networks from damage by repelling water at the adhesive interface. Consequently, SAs even maintain robust and long-lasting adhesion strength in acidic, alkaline, and seawater solutions. Importantly, unlike conventional adhesives, SAs do not employ organic solvents throughout the synthesis, bonding, and recycling processes. By designing functionalized polymers and utilizing polyphenolic compounds, this work provides a green and feasible strategy for the development of next-generation powerful supramolecular adhesives.

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Section: Resultsmentioning

confidence: 95%

Solvent-Free and Recyclable Polyether/Polyphenol Supramolecular Adhesives with Robust, Water- and Low-Temperature-Resistant Properties

Zeng,

Wang,

Cao

et al. 2024

ACS Appl. Polym. Mater.

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“…Polyethers are a class of polymers that show unique advantages in the lubricant field due to their excellent high-temperature stability, low-temperature fluidity, oxidation resistance, and rust prevention properties. , Therefore, they can meet the rigorous lubrication requirements of modern industrial and mechanical equipment in harsh working conditions. Polyethers are usually synthesized by the ring-opening homopolymerization or copolymerization of ethylene oxide (EO) and propylene oxide (PO) .…”

Section: Introductionmentioning

confidence: 99%

Beta Zeolite-Supported Double-Metal Cyanide Catalysts with Enhanced Lewis Acidity for the Synthesis of High-Performance Poly(1,2-butylene oxide) Lubricating Oils

Zeng,

Wang,

Cao

et al. 2024

Ind. Eng. Chem. Res.

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Poly(1,2-butylene oxide) (PBO) is a highly promising and innovative polyether lubricating oil due to its excellent lubricating properties and unique oil miscibility. However, the development of catalysts with low cost, high stability, and excellent catalytic performance for the synthesis of PBO remains a challenge. In this study, we report a series of highly active heterogeneous catalysts composed of layered Zn−Co double-metal cyanides supported by beta zeolite (L-DMC/Al-Beta) for the synthesis of PBO by ring-opening polymerization (ROP) of 1,2-butylene oxide (BO). The catalyst's superior performance can be attributed to the high dispersion of L-DMC on the surface of the Al-Beta support, which increases the availability of Zn active sites. The inclusion of Al-Beta provides additional Lewis acid sites, which facilitate the coordination and ring opening of BO, resulting in an improved polymerization rate. Through semibatch polymerization processes, well-controlled PBOs with a narrow polydispersity index (D̵ = 1.08−1.53) and desired molecular weights (M n = 1400−4500 g mol −1 ) can be obtained. In particular, PBOs exhibit excellent lubricating properties, with a viscosity index of up to 242, a flash point of up to 238 °C, and a pour point as low as −45 °C. Furthermore, PBOs demonstrate excellent miscibility with mineral lubricating oils and can serve as additives to significantly improve their viscosity index. The combination of low cost, easy preparation, and outstanding catalytic performance makes L-DMC/Al-Beta an extremely promising catalyst for the industrial production of high-performance PBO lubricating oils.

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“…23 Unlike in AROP, the propagating species in the cationic ring-opening polymerization (CROP), which is commonly employed for polymerizing three-membered heterocycles of thiirane, is a sulfonium ion rather than thiolate. 24–30 If this strategy was applied in the ROP of thiiranes, the propagating species would be transferred from the thiolate to the sulfonium ion, thus avoiding the formation of –S x – ( x > 1) sequence (Scheme 1B). Moreover, the cationic ring-opening of thiirane preferentially occurs at the methine carbon due to the increased stability of the resulting carbocation compared to that formed at the methylene carbon, which may be of benefit for achieving the control of regioselective ROP of thiiranes with electron-withdrawing substituents.…”

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confidence: 99%

Stereoregular poly(2-phenylthiirane) via cationic ring-opening polymerization

Xiao,

Yue,

et al. 2024

Chem. Commun.

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Synthesis of poly(1,2-butylene oxide-stat-tetrahydrofuran) by controllable polymerization over Sc(OTf)3 for use in high-performance lubricating oil

Cited by 3 publications

References 62 publications

Solvent-Free and Recyclable Polyether/Polyphenol Supramolecular Adhesives with Robust, Water- and Low-Temperature-Resistant Properties

Solvent-Free and Recyclable Polyether/Polyphenol Supramolecular Adhesives with Robust, Water- and Low-Temperature-Resistant Properties

Beta Zeolite-Supported Double-Metal Cyanide Catalysts with Enhanced Lewis Acidity for the Synthesis of High-Performance Poly(1,2-butylene oxide) Lubricating Oils

Stereoregular poly(2-phenylthiirane) via cationic ring-opening polymerization

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