Effectively Analyzing Polymers Using Electron Paramagnetic Resonance (EPR) Spectroscopy

This webinar took place on July 15, 2020

In this webinar, Dr Kalina Ranguelova from Bruker BioSpin, will provide an overview of various industrial and academic applications and literature examples using electron paramagnetic resonance (EPR) spectroscopy to understand paramagnetic behavior of different polymer materials. The ubiquity of free radicals, triplet states, and point defects in polymer materials has rendered EPR an indispensable tool in polymer science among other mainstream analytical techniques. EPR is the best technique for shedding light on these reactions and processes because of its unique ability to unambiguously detect paramagnetic species in a direct and non-intrusive manner. The technique identifies radical reaction intermediates as well as quantifies their concentrations, thus elucidating thermal and light activated mechanisms and kinetics of polymer reactions. It can be applied to samples in liquid or sold states over a wide range of temperatures.

WEDNESDAY - July 15, 2020

Watch On Demand

Key Topics

Monitoring photopolymerization reactions for understanding electron transfer mechanisms in polymers
Polymerizations reaction kinetics
Cross-linking reactions
Annealing in polymers
Sterilizations effects

Speakers

Dr. Kalina Ranguelova

Senior EPR Applications Scientist, Bruker BioSpin

Dr. Kalina Ranguelova has been an EPR Applications Scientist at Bruker BioSpin Corporation since 2011. She completed her Ph.D. at the Bulgarian Academy of Sciences, where her research focused on the structure of inorganic copper complexes using electron paramagnetic resonance (EPR) spectroscopy. After holding research positions at CUNY and the National Institute for Environmental Sciences, where she studied free radical biology and EPR spin trapping as a method for measuring reactive oxygen species (ROS), she joined Bruker. In her current role as an Applications Scientist, she focuses on developing new applications for EPR in various fields and providing customer support and training.

Dr. David Barr

Product Manager – AIC

David Barr received his PhD in 1994 from Utah State University (under the direction of Dr. Steven Aust). His research focused on Free Radical Reactions catalyzed by Lignin Peroxidase. This enzyme is released by a fungus that lives on trees and actively degrades the lignin polymer in “old dead wood” via a free radical mechanism. The program at USU was focused on using this fungus for the decontamination of environmentally persistent pollutants (e.g., pesticides and various military munitions waste.) David continued his work in free radical chemistry as a post-doctoral fellow at the Laboratory of Molecular Biophysics (NIEHS facility in RTP, North Carolina). Electron Spin Resonance spectroscopy was the method of choice in Dr. Ronald Mason’s research group at NIEHS. David then joined Bruker as an Application Scientist in 1996, working with various applications in ESR. More recently, he has become a product manager for Bruker’s bench top ESR systems and his focus is on the transfer of ESR methods to the industrial sector.

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