13 research outputs found
Molecular Simulation of Physical Properties of Hindered-Amine Light Stabilizers in Polyethylene
No full textSynthesis, Structural Characterization, and Conformational Bias in Solution of a Sterically Congested Pyrophosphite: 1
No full textThe Thermal Reaction of Sterically Hindered Nitroxyl Radicals with Allylic and Benzylic Substrates: Experimental and Computational Evidence for Divergent Mechanisms
No full textAtomic Proximity Due to Molecular Congestion: Rational Design of Bis(phosphite) Ligands by Restriction of Molecular Motion 1
No full textStructures of Hard Phases in Thermoplastic Polyurethanes
No full textLimited long-range
ordering and the presence of both hard and soft
segments can cause substantial difficulties for structure determination
in urethane elastomers. Here, the structuring has been investigated
for a series of thermoplastic polyurethanes composed of 4,4′-methylene
diphenyl diisocyanate and 1,4-butanediol. We utilize pair distribution
function analysis of X-ray total scattering measurements to directly
access the local structure and quantify the degree of ordering, showing
that the structure varies significantly over the range of different
component ratios investigated. A simple method is demonstrated for
evaluating the viability of various structure candidates for the hard
segment. The nature of the molecular conformations and packing is
verified, allowing both ordered and disordered components to be quantified
through structural modeling
Structures of Hard Phases in Thermoplastic Polyurethanes
No full textLimited long-range
ordering and the presence of both hard and soft
segments can cause substantial difficulties for structure determination
in urethane elastomers. Here, the structuring has been investigated
for a series of thermoplastic polyurethanes composed of 4,4′-methylene
diphenyl diisocyanate and 1,4-butanediol. We utilize pair distribution
function analysis of X-ray total scattering measurements to directly
access the local structure and quantify the degree of ordering, showing
that the structure varies significantly over the range of different
component ratios investigated. A simple method is demonstrated for
evaluating the viability of various structure candidates for the hard
segment. The nature of the molecular conformations and packing is
verified, allowing both ordered and disordered components to be quantified
through structural modeling
Twisted Intramolecular Charge Transfer States in 2-Arylbenzotriazoles: Fluorescence Deactivation via Intramolecular Electron Transfer Rather Than Proton Transfer
No full textFacile Phosphite to Phosphonate Rearrangement of a Trialkanolamine-derived Triphosphite Promoted by Triethylaluminum
No full textProbing the Intramolecular Hydrogen Bond of 2-(2-Hydroxyphenyl)benzotriazoles in Polar Environment: A Photophysical Study of UV Absorber Efficiency
No full textUnexpected electronic effects on benzotriazole UV absorber photostability: Mechanistic implications beyond excited state intramolecular proton transfer
No full text
