Successive Self-nucleation and Annealing (SSA): Correct design of thermal protocol and applications

Müller, Alejandro J.; Michell, Rose Mary; Pérez, Ricardo; Lorenzo, Arnaldo T.

doi:10.1016/j.eurpolymj.2015.01.015

Cited by 151 publications

(208 citation statements)

References 127 publications

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“…However, under the SSA parameters employed by Müller et al [48,110] (which are dominated by kinetic factors), cyclic chains anneal and produce thicker crystals than their linear analogs. According to Müller et al [48,110], the reasons for the higher annealing capacity of cyclic chains are their lower entanglement density and their ring topology. These characteristics facilitate annealing for cyclic chains, compared with linear chains with a higher entanglement density and lower diffusion coefficients.…”

Section: Successive Self-nucleation and Annealingmentioning

confidence: 98%

“…This technique was developed by Müller et al [109,153]. Recently a review of its correct use and applications has been published [110].…”

Section: Successive Self-nucleation and Annealingmentioning

confidence: 98%

“…SSA has been employed to study cyclic and linear PCLs by Müller et al [48,110], and a novel effect was found. Compared with L-PCLs, a larger annealing capacity of C-PCL lamellar crystals was found.…”

Section: Successive Self-nucleation and Annealingmentioning

confidence: 98%

“…A more detailed explanation of this technique can be found elsewhere [110]. SN consists in performing controlled heating of a sample with a standard thermal history up to a self-seeding temperature called T s .…”

Section: Self-nucleationmentioning

confidence: 99%

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Crystallization of Cyclic Polymers

Pérez-Camargo

Múgica

Zubitur

et al. 2015

Polymer Crystallization I

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The effect of chain topology (ring versus linear polymer chains) on polymer crystallization is reviewed. Recent advances in ring closure and ring expansion synthetic techniques have made available a range of well-characterized samples with higher levels of purity than available decades ago. Cyclic molecules are fascinating because the structural difference between them and linear chains is relatively small, yet their behavior can be completely different from that of their linear analogs of identical chain length. The effect of having no chain ends can dramatically change the polymer coil conformation and diffusion rate, as well as the chain entanglement density in the melt. These changes are reflected in different nucleation and crystallization kinetics for cyclic and linear polymeric chains. However, the results published so far seem to be dependent on the type of polymer employed. Therefore, a careful look at the literature and evidence reported for each group of materials has been assembled and compared. The possible reasons for some of the contradictions in the evidence are also discussed.

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Section: Successive Self-nucleation and Annealingmentioning

confidence: 98%

“…This technique was developed by Müller et al [109,153]. Recently a review of its correct use and applications has been published [110].…”

Section: Successive Self-nucleation and Annealingmentioning

confidence: 98%

Section: Successive Self-nucleation and Annealingmentioning

confidence: 98%

Section: Self-nucleationmentioning

confidence: 99%

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Crystallization of Cyclic Polymers

Pérez-Camargo

Múgica

Zubitur

et al. 2015

Polymer Crystallization I

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“…Self-nucleated crystallization of several polymers has been studied recently. In fact, Muller and co-workers, as well as others, proved that measuring isothermal crystallization rates after self-nucleation with DSC, is a reliable method for evaluating crystallization rates even for the application of the Lauritzen-Hoffman analysis 67 . Figure 5a shows the crystallization half-times for PEF and EF rich copolymers.…”

Section: Glass Transition Temperatures (Tmentioning

confidence: 99%

Biobased poly(ethylene furanoate-co-ethylene succinate) copolyesters: solid state structure, melting point depression and biodegradability

et al. 2016

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Poly(ethylene furanoate) (PEF) is a fully bio-based polyester with unique gas barrier properties, considered an alternative to poly(ethylene terephthalate) (PET) in food packaging applications. However, it is not biodegradable. For this reason copolymerization with the aliphatic succinic acid monomer, was followed. The respective poly(ethylene furanoate-co-ethylene succinate) (PEFSu) copolymers were prepared via melt polycondensation from 2,5-dimethylfuran-dicarboxylate, succinic acid and ethylene glycol at different ratios.1 HNMR spectroscopy showed the copolymers are random. The crystallization and melting of the copolymers were thoroughly evaluated. Isodimorphic cocrystallization was concluded from both the 2 WAXD patterns and the minimum in the plots of melting temperature versus composition. The pseudo-eutectic melting point corresponded to an ethylene succinate content of about 30 mol%. The enzymatic hydrolysis tests using of Rhizopus delemarand Pseudomonas Cepacia lipase, revealed that the copolymers with up to 50 mol% ES units show measurable weight loss rates. For higher ES content, the copolymers showed fast hydrolysis.

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Fractionation of Polymers

Lederer¹,

Ndiripo²

2023

Encyclopedia of Polymer Science and Technology

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Synthetic and natural polymers exist in microstructural distributions, such as chain length, size, chemical composition, branching, tacticity, or comonomer sequence distributions. Polymer fractionation techniques are essential for the analysis of these distributions and help in understanding polymerization mechanisms and material properties. In this article, the theoretical basics of general fractionation approaches and specific fractionation techniques are discussed. Details are given on fractionation techniques for molar mass and chemical composition distribution analysis, such as temperature rising elution fractionation (TREF), crystallization analysis fractionation (CRYSTAF), or crystallization elution fractionation (CEF). In addition, column‐based and channel‐based fractionation methods are extensively discussed. Theoretical and practical aspects of the analysis of molar mass distributions using size exclusion chromatography (SEC) as well as chemical composition distributions by interaction chromatography (SGIC, TGIC, LCCC) and multidimensional separations (2D‐LC) are reviewed and compared. General aspects and details on asymmetrical flow and thermal field flow fractionation techniques (AF4 and ThFFF) are discussed and examples of suitable physical and chemical detectors coupled to fractionation devices for the analysis of size, conformation, or chemical composition and topology are demonstrated.

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Successive Self-nucleation and Annealing (SSA): Correct design of thermal protocol and applications

Cited by 151 publications

References 127 publications

Crystallization of Cyclic Polymers

Crystallization of Cyclic Polymers

Biobased poly(ethylene furanoate-co-ethylene succinate) copolyesters: solid state structure, melting point depression and biodegradability

Fractionation of Polymers

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