Ductile gas barrier poly(ester–amide)s derived from glycolide

Jang, Yoon-Jung; Sangroniz, Leire

doi:10.1039/d2py00479h

Cited by 6 publications

(3 citation statements)

References 58 publications

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“…However, a small number of head-to-tail additions during polymerization could be present and may also facilitate molecular segregation during crystallization and, hence, thermal fractionation. In perfectly linear polymers without any defects that can interrupt the crystallizable sequences, the two possible sources for fractionation are the distribution of molecular weights [ 56 , 59 ] and the existence of intermolecular interactions capable of acting like sticky “defects” in the chains [ 60 ]. This last effect is present in most polar molecules, so its presence in PVDF is also possible.…”

Section: Resultsmentioning

confidence: 99%

Effect of the TrFE Content on the Crystallization and SSA Thermal Fractionation of P(VDF-co-TrFE) Copolymers

María

Goupil

Cavallo

et al. 2022

IJMS

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In this contribution, we study the effect of trifluoro ethylene (TrFE) comonomer content (samples with 80/20, 75/25, and 70/30 VDF/TrFE molar ratios were used) on the crystallization in P(VDF-co-TrFE) in comparison with a PVDF (Poly(vinylidene fluoride)) homopolymer. Employing Polarized Light Optical Microscopy (PLOM), the growth rates of spherulites or axialites were determined. Differential Scanning Calorimetry (DSC) was used to determine overall crystallization rates, self-nucleation, and Successive Self-nucleation and Annealing (SSA) thermal fractionation. The ferroelectric character of the samples was explored by polarization measurements. The results indicate that TrFE inclusion can limit the overall crystallization of the copolymer samples, especially for the ones with 20 and 25% TrFE. Self-nucleation measurements in PVDF indicate that the homopolymer can be self-nucleated, exhibiting the classic three Domains. However, the increased nucleation capacity in the copolymers provokes the absence of the self-nucleation Domain II. The PVDF displays a monomodal distribution of thermal fractions after SSA, but the P(VDF-co-TrFE) copolymers do not experience thermal fractionation, apparently due to TrFE incorporation in the PVDF crystals. Finally, the maximum and remnant polarization increases with increasing TrFE content up to a maximum of 25% TrFE content, after which it starts to decrease due to the lower dipole moment of the TrFE defect inclusion within the PVDF crystals.

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Section: Resultsmentioning

confidence: 99%

Effect of the TrFE Content on the Crystallization and SSA Thermal Fractionation of P(VDF-co-TrFE) Copolymers

María

Goupil

Cavallo

et al. 2022

IJMS

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“…Although aziridines possess a similar structure and ring strain to epoxides, their chemical reactivities differ because of the lower electronegativity of nitrogen and the stronger nucleophilicity of the lone pair of electrons on the nitrogen atom . Nevertheless, PEAs combine the excellent biocompatibility and degradability of polyesters with the outstanding thermal and mechanical properties of polyamides and have grown as essential biomaterials in applications ranging from packaging, 3D printing, , and drug delivery to tissue engineering. − …”

Section: Introductionmentioning

confidence: 99%

Toward Catalyst-Free Synthesis of Tough Cyclic Poly(Ester Amide)s: Alternating Copolymerization of Aziridines and Phthalic Anhydride

Qin,

Tang

2023

Macromolecules

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Polymerization using aziridines as building blocks is an attractive route to acquire N-containing polymers with various architectures. Despite the diverse functionalities and applications of the resulting polymers, achieving control over the polymerization process has proven challenging. Here, we report a facile and efficient approach for synthesizing cyclic poly(ester amide)s (PEAs) through copolymerizing N-substituted aziridines and phthalic anhydride. The copolymerization of readily available monomers proceeded efficiently via a catalyst-free strategy, affording copolymers with high molar mass and alternating selectivity. Kinetic studies of copolymerization revealed a first-order dependence on the monomer pair. By modification of the substituents on nitrogen, five cyclic PEAs with distinct thermal and mechanical properties were prepared. Moreover, phosphazene was utilized to achieve perfect alternating sequences and adjustable molar masses. Given the abundance of aziridines and cyclic anhydrides, this study proposes a simple and atom-economical method for synthesizing cyclic PEAs with diverse backbone or side group structures.

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“…Therefore poly(ester amide) containing ester and amide groups has received a lot of attention as a new and promising material. [15][16][17][18][19][20][21][22] FDCAbased poly(ester amides) have gained attention as a new and promising material due to their high strength, tenacity, and potential for high glass transition temperature. 19,20,23 Amides can form the intermolecular hydrogen bonds, increasing intermolecular forces and improving thermal properties.…”

Section: Introductionmentioning

confidence: 99%

Poly(butylene 2,5-furandicarboxylate) copolyester obtained using 1,6-hexanediamine with high glass transition temperature

Wang,

Su,

Liu

et al. 2023

RSC Adv.

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Ductile gas barrier poly(ester–amide)s derived from glycolide

Abstract: Sustainable poly(ester–amide)s derived from glycolide have been synthesized and their thermal, mechanical, and gas barrier properties have been studied by systematically changing the number of methylene groups.

Cited by 6 publications

References 58 publications

Effect of the TrFE Content on the Crystallization and SSA Thermal Fractionation of P(VDF-co-TrFE) Copolymers

Effect of the TrFE Content on the Crystallization and SSA Thermal Fractionation of P(VDF-co-TrFE) Copolymers

Toward Catalyst-Free Synthesis of Tough Cyclic Poly(Ester Amide)s: Alternating Copolymerization of Aziridines and Phthalic Anhydride

Poly(butylene 2,5-furandicarboxylate) copolyester obtained using 1,6-hexanediamine with high glass transition temperature

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