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Article
Development of multiorganic calciphylaxis during teriparatide, vitamin D, and calcium treatment
Non-uremic calciphylaxis is a severe rare disorder characterized by ischemic necrosis. Recently, three cases of cutaneous calciphylaxis have been described in the context of teriparatide treatment. We present ...
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Article
Universal Trend of the Non-Exponential Rouse Mode Relaxation in Glass-Forming Polymers Systems: Experimental Facts, MD-Simulation Results and a Theoretical Approach Based on a Generalized Langevin Equation
Nowadays there are clear evidences from both experiments and MD-simulations proving that the chain Rouse modes correlation functions are non-exponential in unentangled polymer blends and also in pure polymers ...
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Article
PDMS behaviour under confinement in strongly segregated mesophases of PS-PDMS diblock copolymers
A dynamic and thermal investigation by means of broadband dielectric spectroscopy and temperature modulated differential scanning calorimetry on the PDMS behaviour in several highly segregated diblock copolym...
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Article
Dynamics of confined water in different environments
We report dielectric and calorimetric results on water solutions of poly (vinyl methyl ether) (PVME), poly(vinyl pyrrolidone) (PVP) and pentaethylene glycol (5EG). In spite of the fact that water is confined i...
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Article
Crossover from Rouse dynamics to the α-relaxation in poly (vinyl ethylene)
By means of neutron spin echo (NSE) we have explored the dynamics of poly(vinyl ethylene) on length scales covering Rouse dynamics and below. The results establish the simultaneous existence of a generic subli...
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Article
Hydrogen motions and the α-relaxation in glass-forming polymers: Molecular dynamics simulation and quasi-elastic neutron scattering results
The combination of molecular dynamics simulations and neutron scattering measurements on three different glass-forming polymers (polyisoprene, poly(vinyl ethylene) and polybutadiene) has allowed to establish t...
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Article
Self-confined polymer dynamics in miscible binary blends
The segmental dynamics of PVME within the single-phase state of poly(styrene)/poly(vinyl methyl ether) blends (PS/PVME) was examined by dielectric spectroscopy. A particular attention has been given to the hig...
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Article
Segmental order and dynamics of polymer chains confined in block copolymer lamellar mesophases: NMR and dielectric relaxation studies
The PDMS lamellar sublayers of a poly(styrene)-poly(dimethylsiloxane) diblock (PS-PDMS) and PS-PDMS-PS triblocks are investigated by NMR and dielectric spectroscopy. Some segments of the confined PDMS chains d...
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Article
Methyl group dynamics in a confined glass
We present a neutron scattering investigation on methyl group dynamics in glassy toluene confined in mesoporous silicates of different pore sizes. The experimental results have been analysed in terms of a barr...
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Chapter
Dynamics of Glass Forming Polymers by Neutron Spin Echo
Nowadays life would be difficult to imagine without the ubiquitous presence of polymers. They are very important from both, the technical/practical and the basic point of view. As chains made of simply connect...
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Chapter
Polymer Dynamics by Dielectric Spectroscopy and Neutron Scattering — a Comparison
Polymeric systems show a very rich variety of dynamical processes which manifest themselves in different frequency ranges at a given temperature. Between vibrations taking place at time scales faster than the ...
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Article
Secondary relaxation in two engineering thermoplastics by neutron scattering and dielectric spectroscopy
We present a preliminary investigation of the dynamics of glassy polycarbonate (PC) and polysulfone (PSF) by means of quasielastic neutron scattering and dielectric spectroscopy. Whereas the consideration of p...
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Article
Neutron scattering on partially deuterated polybutadiene
The molecular nature of the secondary relaxation (Johari–Goldstein relaxation) and its relationship with the α relaxation is in most cases still unknown. In order to access these processes on a molecular level...
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Article
Methyl group dynamics in a glass and its crystalline counterpart by neutron scattering
Methyl group dynamics in the same sample of sodium acetate trihydrate in crystalline and glassy states have been investigated by neutron scattering. Measurements have been carried out in the whole temperature ...
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Article
The rotational barrier for methyl group dynamics in anhydrous sodium acetate
Methyl group dynamics in anhydrous sodium acetate have been investigated by neutron scattering. The results in the rotational tunnelling and crossover regimes can be understood in terms of a threefold rotation...
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Article
Component dynamics in polymer blends: a combined QENS and dielectric spectroscopy investigation
The individual dynamics of the two constituents of a binary polymer blend was studied by means of quasielastic neutron scattering and dielectric spectroscopy (DS). The combination of neutron spin-echo and back...
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Article
Dynamics at the Glass Transition in Polymers: Results from Neutron Spectroscopy
This short review presents quasielastic neutron scattering and dielectric experiments on the βslow relaxation in polybutadiene and polyvinylchloride. Exploiting the momentum transfer dependent dynamic structure f...
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Article
Fast Dynamics in Glass-Forming Polymers Revisited
The so called “fast-dynamics” of glass-forming systems as observed by time of flight (TOF) neutron scattering techniques is revisited. TOF-results corresponding to several glass-forming polymers with different...
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Chapter
Dynamics of the α-relaxation in glass-forming polymeric systems. Study by neutron scattering and relaxation techniques
The dynamics of the α-relaxtion in three glass-forming polymeric systems has been studied by means of quasielastic neutron scattering as well as by relaxation techniques. By using these techniques, we have covere...
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Chapter
Relaxation behaviour in bulk PIMA and PIMA-PMMA copolymer near T g
The relaxation processes in the glass-transition temperature range of bulk PIMA and PIMA-PMMA copolymer have been studied by means of Photon Correlation Spectroscopy (PCS) and dielectric spectroscopy (DR). The...
