Synthesis of copolyesters with bio-based lauric diacid: structure and physico-mechanical studies

Chen, Mei‐Ling; Saada, Nesren A. H.; Liu, Fei; Na, Haining; Zhu, Jin

doi:10.1039/c7ra11771j

Cited by 7 publications

(4 citation statements)

References 43 publications

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“…It can be found that two narrow and sharp diffraction peaks located at 2θ = 21.5 • and 24.2 • appeared in the pattern, representing the typical (110) and (200) planes of the orthorhombic unit cell, which are consistent with the results reported in the literature [26]. The peak positions of PBD and PE are almost the same [27,28], suggesting they have similar crystal structures. The same diffraction pattern of the PBD and the branched PBD meant that the branching did not change the crystal structure of the PBD.…”

Section: The Chemical Structures and Compositionssupporting

confidence: 88%

Long-Chain Branched Bio-Based Poly(butylene dodecanedioate) Copolyester Using Pentaerythritol as Branching Agent: Synthesis, Thermo-Mechanical, and Rheological Properties

Niu

Zheng

et al. 2023

Polymers

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The introduction of long-chain branched structures into biodegradable polyesters can effectively improve the melt strength and blow-molding properties of polyesters. In this study, pentaerythritol (PER) was used as a branching agent to synthesize branched poly(butylene dodecanedioate) (PBD), and the resulting polymers were characterized by Nuclear Magnetic Resonance Proton Spectra (1H NMR) and Fourier Transform Infrared spectroscopy (FT-IR). It was found that the introduction of a small amount of PER (0.25–0.5 mol%) can generate branching and even crosslinking structures. Both impact strength and tensile modulus can be greatly improved by the introduction of a branching agent. With the introduction of 1 mol% PER content in PBD, the notched impact strength of PBD has been increased by 85%, and the tensile modulus has been increased by 206%. Wide-angle X-ray diffraction and differential scanning calorimetry results showed that PER-branched PBDs exhibited improved crystallization ability compared with linear PBDs. Dynamic viscoelastics revealed that shear-thickening behaviors can be found for all branched PBD under low shear rates.

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Section: The Chemical Structures and Compositionssupporting

confidence: 88%

Long-Chain Branched Bio-Based Poly(butylene dodecanedioate) Copolyester Using Pentaerythritol as Branching Agent: Synthesis, Thermo-Mechanical, and Rheological Properties

Niu

Zheng

et al. 2023

Polymers

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“…The WAXD diffraction pattern was used to further analyze the crystalline properties of PBD x PU y and the results are shown in Figure 8. Two distinct peaks with 2θ values at 21.22 • and 23.56 • can be observed for PBD 80% PU 20% and PBD 70% PU 30% , which are almost identical to the diffraction peaks of PBD as previously reported in the literature (2θ = 21.39 • and 23.72 • ) [37]. This suggests that the polyester soft segment in the polymer is highly crystallized.…”

Section: Crystallization Properties Of Pbd X Pu Y Filmssupporting

confidence: 84%

“…To further analyze the crystallinity of PBD x PU y , the WAXD peaks of PBD x PU y were differentiated and fitted using Peak Fit v4.12 software. The peaks of WAXD spectra of all four samples can be divided into four Gaussian-fitted peaks (21.39 • , 23.72 • , 20.60 • , 22.70 • ) according to the literature [5,37], as shown in Figure 9. The maximum fitting error was less than 0.5% and the correlation coefficient was all greater than 0.995.…”

Section: Crystallization Properties Of Pbd X Pu Y Filmsmentioning

confidence: 99%

Synthesis, Structure and Properties of Polyester Polyureas via a Non-Isocyanate Route with Good Combined Properties

Zheng,

Xie,

et al. 2024

Polymers

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Polyureas have been widely applied in many fields, such as coatings, fibers, foams and dielectric materials. Traditionally, polyureas are prepared from isocyanates, which are highly toxic and harmful to humans and the environment. Synthesis of polyureas via non-isocyanate routes is green, environmentally friendly and sustainable. However, the application of non-isocyanate polyureas is quite restrained due to their brittleness as the result of the lack of a soft segment in their molecular blocks. To address this issue, we have prepared polyester polyureas via an isocyanate-free route and introduced polyester-based soft segments to improve their toughness and endow high impact resistance to the polyureas. In this paper, the soft segments of polyureas were synthesized by the esterification and polycondensation of dodecanedioic acid and 1,4-butanediol. Hard segments of polyureas were synthesized by melt polycondensation of urea and 1,10-diaminodecane without a catalyst or high pressure. A series of polyester polyureas were synthesized by the polycondensation of the soft and hard segments. These synthesized polyester-type polyureas exhibit excellent mechanical and thermal properties. Therefore, they have high potential to substitute traditional polyureas.

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“…[140] However,d ue to the higher amount of side reactions and yellowing generated by titanium [136] compounds, most commerciallya vailables emiaromatic polyesters are produced by using antimony and germanium oxides or am ixture of metals. Typical metals for these catalysts are tin(II), antimony(III), bismuth(III),t itanium(IV), zirconium(IV), and hafnium(IV).…”

Section: Transition-metala Lkoxidesmentioning

confidence: 99%

Biotic and Abiotic Synthesis of Renewable Aliphatic Polyesters from Short Building Blocks Obtained from Biotechnology

2018

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Biobased polymers have seen their attractiveness increase in recent decades thanks to the significant development of biorefineries to allow access to a wide variety of biobased building blocks. Polyesters are one of the best examples of the development of biobased polymers because most of them now have their monomers produced from renewable resources and are biodegradable. Currently, these polyesters are mainly produced by using traditional chemical catalysts and harsh conditions, but recently greener pathways with nontoxic enzymes as biocatalysts and mild conditions have shown great potential. Bacterial polyesters, such as poly(hydroxyalkanoate)s (PHA), are the best example of the biotic production of high molar mass polymers. PHAs display a wide variety of macromolecular architectures, which allow a large range of applications. The present contribution aims to provide an overview of recent progress in studies on biobased polyesters, especially those made from short building blocks, synthesized through step-growth polymerization. In addition, some important technical aspects of their syntheses through biotic or abiotic pathways have been detailed.

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Synthesis of copolyesters with bio-based lauric diacid: structure and physico-mechanical studies

Abstract: Copolyesters developed from bio-based long-chain dicarboxylic acid show promising mechanical properties that are helpful for their application as biodegradable materials.

Cited by 7 publications

References 43 publications

Long-Chain Branched Bio-Based Poly(butylene dodecanedioate) Copolyester Using Pentaerythritol as Branching Agent: Synthesis, Thermo-Mechanical, and Rheological Properties

Long-Chain Branched Bio-Based Poly(butylene dodecanedioate) Copolyester Using Pentaerythritol as Branching Agent: Synthesis, Thermo-Mechanical, and Rheological Properties

Synthesis, Structure and Properties of Polyester Polyureas via a Non-Isocyanate Route with Good Combined Properties

Biotic and Abiotic Synthesis of Renewable Aliphatic Polyesters from Short Building Blocks Obtained from Biotechnology

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