Anionic and pseudoanionic polymerization of lactones - a comparison

Polymerization via anionic mechanisms or insertion mechanisms (pseudoanionic mechanisms) are compared for β-lactones and L-lactide. The following aspects are discussed: initiation and deprotonation of β-lactones, back-biting degradation, stereosequences of poly(β-D,L-butyrolactone), racemization of L-lactide, systematic variation of endgroups including synthesis of macromers.     

Multi-phase modeling of shape memory polymers

In the present work, we propose a model for shape memory polymers based on the idea of the multiplicative decomposition of the deformation gradient. Evolution equations for the several deformation components are presented that provide for the storage of the entropy-elastic strain and its recovery during the transition between the frozen phase and the active phase. First characteristic shape memory cycles for small and large deformations will be shown as a last point. (© 2012 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim)     

A Unified Approach to Uniform Signal Recovery From Nonlinear Observations

Foundations of Computational Mathematics - Recent advances in quantized compressed sensing and high-dimensional estimation have shown that signal recovery is even feasible under strong nonlinear...