CH3ONa-initiated two-step-transesterification of DMC (dimethyl carbonate) and α,ω-alkanediol for poly(alkylene carbonate)

Zhou, Rui; Niu, Zelin; Li, Jia; Jiang, Liu; Lü, Xingqiang; Song, Zhanping

doi:10.1016/j.inoche.2018.02.017

Cited by 7 publications

(2 citation statements)

References 17 publications

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“…12,13 There are a series of studies investigating the chemical−physical performance of polycarbonates which DMC produced with diols of different chain lengths. 14,15 However, the low melting point, slow crystallization rate, and low thermal stability have significantly limited the application scope and processing window of aliphatic polycarbonates. Hence, a series of third units were used to copolymerize with aliphatic polycarbonates to overcome their disadvantages.…”

Section: Introductionmentioning

confidence: 99%

“…It is well known that DMC is a crucial downstream product of CO 2 through the oxidative carbonylation of methanol. Moreover, DMC has been widely used as the starting monomer for synthesizing polycarbonate, which is a crucial green, biodegradable, and environmentally friendly chemical. , Comparing polycarbonate with other aliphatic polyesters, the high density of the ester group in the leading chains would significantly improve the mechanical strength and barrier properties. , There are a series of studies investigating the chemical–physical performance of polycarbonates which DMC produced with diols of different chain lengths. , However, the low melting point, slow crystallization rate, and low thermal stability have significantly limited the application scope and processing window of aliphatic polycarbonates. Hence, a series of third units were used to copolymerize with aliphatic polycarbonates to overcome their disadvantages. − In the previous study, dimethyl terephthalate (DMT) was introduced into the leading chains of poly(butylene carbonate) (PBC) through the melt polycondensation method.…”

Section: Introductionmentioning

confidence: 99%

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Scale Synthesis of Poly(butylene carbonate-co-terephthalate) and Its Depolymerization–Repolymerization Recycling Process

Liu

et al. 2023

Ind. Eng. Chem. Res.

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Development of biodegradable aliphatic–aromatic copolyesters has been widely accepted by society as a promising strategy to solve plastic pollution. Here, a kilogram-scale aliphatic–aromatic copolyester, poly(butylene carbonate-co-terephthalate) (PBCT), has been successfully synthesized using a 5 L steel reactor. The physical–chemical properties, including composition, microstructure, thermal properties, crystal structure, rheology behavior, mechanical properties, and water barrier property, were systematically investigated. The results illustrated that PBCT could be used as an ideal barrier packaging film material. In addition, the closed-loop recycling property of PBCT was preliminarily explored. The aromatic units of PBCT copolyesters were able to be recycled using the esterification byproduct, which consisted of methanol and dimethyl carbonate. The evolution of molar weights during the alcoholysis process indicated that PBCT could be completely converted to dimethyl terephthalate (DMT). The repolymerized PBCT prepared with the recycled DMT showed no significant property loss compared with the initial PBCT. This work provides a novel insight and direction for treating waste biodegradable polyesters, which could overcome the post-consumer plastic waste accumulation in the environment.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Scale Synthesis of Poly(butylene carbonate-co-terephthalate) and Its Depolymerization–Repolymerization Recycling Process

Liu

et al. 2023

Ind. Eng. Chem. Res.

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Direct CO₂ Transformation to Aliphatic Polycarbonates

Tamura¹,

Nakagawa

Tomishige

2022

Asian J Org Chem

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Reduction of CO2 emission is an important issue all over the world, and the development of effective transformation methods of CO2 into valuable chemicals is highly desirable. Among various potential products derived from CO2, polymers are one of the promising target chemicals in terms of the production amount and CO2 fixation to solid materials. Therefore, the direct synthesis of polycarbonates from CO2 has recently attracted much attention because polycarbonates including polycarbonate diols are useful engineering plastics and intermediates for polyurethanes. There are many reports on the synthesis of polycarbonates from CO2 and cyclic ethers such as epoxides and oxetanes, however, the reports on the synthesis from CO2 and diols are limited. In this review, we summarize the recent progress of direct polycarbonate synthesis from CO2 and diols and explain the potential and issues for industrialization based on the characteristics of the reaction systems.

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Controlled synthesis of aliphatic polycarbonate diols using dimethyl carbonate and various diols

Liu

Wang

Yang

2022

J Chinese Chemical Soc

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Polycarbonate diols (PCDLs) are mainly used as soft segments for the synthesis of high‐performance polyurethanes. In this work, dimethyl carbonate (DMC) and aliphatic diols are selected as reactants and CH3COONa is used as a catalyst to synthesize a series of PCDLs with different structures and different molecular weights by ester exchange polymerization reaction. The chemical structures of the PCDLs are characterized by FT‐IR, 1H NMR, and 13C NMR, and the components of the distillates in the ester exchange stage are analyzed by gas chromatography. Due to the azeotropic problem of DMC and by‐product methanol during the ester exchange process, It is difficult to design and control the reactions of PCDLs to obtain the target molecular weight products. Based on the reaction process of PCDLs, we proposed a method to design and synthesize the target molecular weight of PCDLs by using the reaction molar ratio of DMC and aliphatic diols involved in the transesterification reaction, which is not affected by the conditions of transesterification reaction and is applicable to the reactions of DMC with various diols.

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CH3ONa-initiated two-step-transesterification of DMC (dimethyl carbonate) and α,ω-alkanediol for poly(alkylene carbonate)

Cited by 7 publications

References 17 publications

Scale Synthesis of Poly(butylene carbonate-co-terephthalate) and Its Depolymerization–Repolymerization Recycling Process

Scale Synthesis of Poly(butylene carbonate-co-terephthalate) and Its Depolymerization–Repolymerization Recycling Process

Direct CO₂ Transformation to Aliphatic Polycarbonates

Controlled synthesis of aliphatic polycarbonate diols using dimethyl carbonate and various diols

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CH3ONa-initiated two-step-transesterification of DMC (dimethyl carbonate) and α,ω-alkanediol for poly(alkylene carbonate)

Cited by 7 publications

References 17 publications

Scale Synthesis of Poly(butylene carbonate-co-terephthalate) and Its Depolymerization–Repolymerization Recycling Process

Scale Synthesis of Poly(butylene carbonate-co-terephthalate) and Its Depolymerization–Repolymerization Recycling Process

Direct CO2 Transformation to Aliphatic Polycarbonates

Controlled synthesis of aliphatic polycarbonate diols using dimethyl carbonate and various diols

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Product

Resources

About

Direct CO₂ Transformation to Aliphatic Polycarbonates