Journal ArticleDOI
SAXS/DSC Analysis of the Lamellar Thickness Distribution on a SSA Thermally Fractionated Model Polyethylene
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TLDR
In this paper, successive self-nucleation and annealing (SSA) is applied to thermally fractionate a model hydrogenated polybutadiene (HPCA), which produces discrete and well-separated thermal fractions with distinct melting peaks.Abstract:
Successive self-nucleation and annealing (SSA) is applied to thermally fractionate a model hydrogenated polybutadiene SSA produces discrete and well-separated thermal fractions with distinct melting peaks The samples are studied by SAXS as a function of temperature The SAXS profile displays only one scattering peak associated with the interlamellar correlation and is unable to discriminate the multimodal distribution of lamellar thicknesses in the samples The average lamellar thickness associated with each melting fraction can be estimated from SAXS data at different temperatures A modified Gibbs-Thomson equation is employed to predict the lamellar thickness from DSC data, giving results consistent with those derived from SAXSread more
Citations
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Journal ArticleDOI
Successive Self-nucleation and Annealing (SSA): Correct design of thermal protocol and applications
Alejandro J. Müller,Alejandro J. Müller,Alejandro J. Müller,Rose Mary Michell,Ricardo Pérez,Arnaldo T. Lorenzo,Arnaldo T. Lorenzo +6 more
TL;DR: In this paper, the authors review the principles, applications and perspectives of successive self-nucleation and Annealing (SSA), a thermal fractionation protocol designed to deconvolute Differential Scanning Calorimetry (DSC) melting endotherms into elementary components.
Journal ArticleDOI
Nucleation, crystallization, self-nucleation and thermal fractionation of cyclic and linear poly(ε-caprolactone)s
Ricardo Pérez,Miguel E. Córdova,Juan V. López,Jessica N. Hoskins,Boyu Zhang,Scott M. Grayson,Alejandro J. Müller,Alejandro J. Müller,Alejandro J. Müller +8 more
TL;DR: In this paper, a series of low polydispersity cyclic PCL samples (C-PCLs) as well as their linear analogs (L-PCLs) were synthesized by click chemistry in a number average molecular weight (M n ) range of 2-22 kg/mol.
Journal ArticleDOI
Abiotic degradation of LDPE and LLDPE formulated with a pro-oxidant additive
Alejandro J. Benítez,Johan J. Sánchez,María Luisa Arnal,Alejandro J. Müller,Oliverio Rodríguez,Graciela Morales +5 more
TL;DR: In this paper, the influence of a pro-oxidant additive on the accelerated and environmental degradation of linear low density polyethylene (LLDPE) and LDPE was investigated.
Journal ArticleDOI
Polymerization control and fast characterization of the stereo-defect distribution of heterogeneous Ziegler–Natta isotactic polypropylene
TL;DR: In this paper, a relative time-saving method, successive self-nucleation and annealing (SSA) fractionation was applied to evaluate the stereo-defect distribution of iPP.
Journal ArticleDOI
A comprehensive review on polymer single crystals—From fundamental concepts to applications
TL;DR: In this paper, a review of single crystal engineering and applications is presented, including magnetically recyclable catalyst supports, nano-hybrid shish-kebabs to mimic the natural bone nanostructures, and nano/micromotors.
References
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Journal ArticleDOI
Self-nucleation and recrystallization of isotactic polypropylene (α phase) investigated by differential scanning calorimetry
TL;DR: In this article, the authors examined the crystallization behavior after partial or complete melting of the α phase of iPP by combined differential scanning calorimetry (DSC) and optical microscopy: the results are directly correlated with corresponding morphologies of microtome sections of DSC samples.
Journal ArticleDOI
Thermal fractionation of polymers
TL;DR: In this article, a review of step crystallization from the melt (SC) and successive self-nucleation and annealing (SSA) is presented, with a particular emphasis on the two techniques most commonly applied in the literature.
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Successive self-nucleation/annealing (SSA): A novel technique to study molecular segregation during crystallization
TL;DR: In this article, a new procedure to fractionate ethylene/α-olefin copolymers using step-crystallization was presented, which allows melt/melt and melt/solid segregation to occur during thermal cycles that promote self-nucleation, crystallization and annealing processes.
Journal ArticleDOI
Effect of annealing time on the self‐nucleation behavior of semicrystalline polymers
TL;DR: In this paper, the authors investigated the time dependence of the self-nucleation in Domain II self-melting and showed that if crystal fragments are present (even if undetected by the employed techniques) their final melting is a very slow process (in the order of hours).
Journal ArticleDOI
Applications of Successive Self-Nucleation and Annealing (SSA) to Polymer Characterization
María Luisa Arnal,Vittoria Balsamo,G. Ronca,A Sánchez,Alejandro J. Müller,E. Canizales,C. Urbina de Navarro +6 more
TL;DR: In this paper, successive self-nucleation and annealing (SSA) was used to characterize polyolefins with very dissimilar molecular structures and the optimum conditions to thermally fractionate any suitable polymer sample with SSA.