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Dynamical Correlations for Statistical Copolymers from High-Throughput Broad-Band Dielectric Spectroscopy
Xiao Zhang1, Jing Zhao1, Changhuai Ye1
1Department of Polymer Engineering , University of Akron , Akron , Ohio 44325 , United States.
ACS Combinatorial Science
|February 23, 2019
Summary
A new high-throughput dielectric spectroscopy instrument enables simultaneous testing of 48 samples, accelerating polymer relaxation dynamics analysis. This advancement facilitates rapid materials design for diverse technological applications.
Area of Science:
- Materials Science
- Polymer Physics
- Spectroscopy
Background:
- Broad-band dielectric spectroscopy (BDS) is crucial for understanding material relaxation dynamics.
- Characterizing relaxation in polymers is essential for their technological applications.
- Existing BDS methods can be time-consuming for high-throughput analysis.
Purpose of the Study:
- To introduce and validate a novel high-throughput broad-band dielectric spectroscopy (HTBDS) instrument.
- To accelerate the characterization of relaxation dynamics in polymers.
- To establish mixing rules for dynamic properties in acrylate copolymers.
Main Methods:
- Development of a coaxial switching system for simultaneous measurement of 48 samples.
- Integration of shared environmental control for coordinated sample analysis.
- Validation against standard BDS measurements using three polymer samples.
Main Results:
- The HTBDS instrument demonstrated reproducible results consistent with traditional BDS.
- Established mixing rules for glass transition temperatures (Tg) and kinetic fragility indices in acrylate copolymers.
- Observed agreement with the Fox rule for Tg averaging and a linear rule for fragility indices.
Conclusions:
- HTBDS significantly increases throughput (approx. 10x) compared to standard BDS.
- The instrument enables high-throughput materials design for tailored dynamic response.
- Provides new insights into mixing rules and correlations of polymer dynamic properties.
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