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Now showing items 2951-2960 of 5046
Understanding Cash Sharing: A Sustainability Model
(MDPI, 2019-03-20)
Traditionally, corporate treasury management has been strategically based on the idea of advancing collections and delaying payments, which has been regulated through the intermediation of financial entities using, for ...
Improvement Actions for a More Social and Sustainable Public Procurement: A Delphi Analysis
(MDPI, 2019-08)
Public procurement accounts for almost 20% of Spain's gross domestic product (GDP). The current legislation allows for the inclusion of social considerations in contracting processes, hence the interest of this study, which ...
Influence of Chemical Structures on Isodimorphic Behavior of Three Different Copolycarbonate Random Copolymer Series
(American Chemical Society, 2020-01-10)
Three series of aliphatic random copolycarbonates, poly(heptane-co-dodecane carbonate) P7C-P12C, poly(butane-co-dodecane carbonate) P4C-P12C and poly(butane-co-heptane carbonate) P4C-P7C, were synthesized by two-step ...
Effect of Chemical Structure and Salt Concentration on the Crystallization and Ionic Conductivity of Aliphatic Polyethers
(MDPI, 2019-03-09)
Poly(ethylene oxide) (PEO) is the most widely used polymer in the field of solid polymer electrolytes for batteries. It is well known that the crystallinity of polymer electrolytes strongly affects the ionic conductivity ...
CO2-sourced polycarbonates as solid electrolytes for room temperature operating lithium batteries
(Royal Society of Chemistry, 2019-03-19)
In the last few years, polycarbonates have been identified as alternatives to poly(ethylene oxide) as polymer electrolytes for lithium battery applications. In this work, we show the design of CO2-sourced
polycarbonates ...
Opportunities for organocatalysis in polymer synthesis via step-growth methods
(Elservier, 2019-03-14)
Organocatalysis has emerged as an invaluable tool for polymer synthesis and has already demonstrated versatility for replacing organometallic catalysts in many polymerization reactions. The overall ease of removal and lower ...
Chemical Structure Drives Memory Effects in the Crystallization of Homopolymers
(ACS, 2020-06-11)
Although the study of melt memory has attracted much interest, the effect of polymer chemical structure on its origin has not been fully elucidated. In this work, we study melt memory effects by Differential Scanning ...
Self-nucleation Effects on Polymer Crystallization
(ACS, 2020-05-28)
The existence of a “memory” of the previous crystalline state, which survives melting and enhances re-crystallization kinetics by a self-nucleation process, is well-known in polymer crystallization studies. Despite being ...
Melt Memory Effects in Poly(butylene succinate) Studied by Differential Fast Scanning Calorimetry
(MDPI, 2020-11-26)
It is widely accepted that melt memory effect on polymer crystallization depends on thermal history of the material, however a systematic study of the different parameters involved in the process has been neglected, so ...
Nietzsche-Wagner: el encuentro.
(Bitarte, 2010-12)
La evolución de Nietzsche y las claves de su ruptura con Wagner.