Supporting data for Dynamic Aliphatic Polyester Elastomers Crosslinked with Aliphatic Dianhydrides

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https://doi.org/10.13020/qewn-zh14
https://hdl.handle.net/11299/250608

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Keywords

polyester

covalent adaptable networks

internal catalysis

Collection period

2020-09-17
2022-02-02

Date completed

2023-01-25

Date updated

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Title

Supporting data for Dynamic Aliphatic Polyester Elastomers Crosslinked with Aliphatic Dianhydrides

Published Date

2023-01-27

Authors

Meyersohn, Marianne S

Haque, Farihah M

Hillmyer, Marc A

Group

University of Minnesota, Department of Chemistry

Author Contact

Hillmyer, Marc, A
hillmyer@umn.edu

Type

Dataset
Experimental Data

Abstract

These files contain primary data along with associated output from instrumentation supporting all results reported in Meyersohn, M. et. al. "Dynamic Aliphatic Polyester Elastomers Crosslinked with Aliphatic Dianhydrides." In Meyersohn, M. et. al. we found: Chemically crosslinked elastomers are a class of polymeric materials with properties that render them useful as adhesives, sealants, and in other engineering applications. Poly(γ-methyl-ε-caprolactone) (PγMCL) is a hydrolytically degradable and compostable aliphatic polyester that can be biosourced and exhibits competitive mechanical properties to traditional elastomers when chemically crosslinked. A typical limitation of chemically crosslinked elastomers is that they cannot be reprocessed; however, incorporation of dynamic covalent bonds (DCBs) can allow for bonds to reversibly break and reform under an external stimulus, usually heat. In this work we the study dynamic behavior and mechanical properties of PγMCL elastomers synthesized from aliphatic dianhydride crosslinkers. The crosslinked elastomers in this work were synthesized using the commercially available crosslinkers, 1,2,4,5-cyclohexanetetracarboxylic dianhydride (CHDA), and 1,2,3,4-cyclobutanetetracarboxylic dianhydride (CBDA) and three-arm hydroxy-telechelic PγMCL star polymers. Stress relaxation experiments on the crosslinked networks showed an Arrhenius dependence of viscosity with temperature with an activation energy of 118 ± 8 kJ/mol, which agrees well with the activation energy of the exchange chemistry obtained from small molecule model studies. Dynamic mechanical thermal analysis and rheological experiments confirmed the dynamic nature of the networks and provided insight into the mechanism of exchange (i.e., associative, or dissociative). Tensile testing showed that these materials can exhibit high strains at break and low Young’s moduli, characteristic of soft, strong elastomers. By controlling the exchange chemistry and understanding the effect of macromolecular structure on mechanical properties, we prepared high performing elastomers that can be rapidly reprocessed at moderately elevated temperatures.

Description

A full description can be found in the README.txt file. The files below include raw characterization data used in all analyses. Subfolders and files are organized using the nomenclature established in the manuscript, which is also described in the “README.txt” file. Raw data from raw nuclear magnetic resonance spectroscopy kinetics are organized based on type of kinetics experiment, temperature and timepoint. All raw nuclear magnetic resonance spectroscopy data files can be accessed using MNova or Bruker software. CDX files can be viewed with ChemDraw, which is a proprietary software distributed by CambridgeSoft. All other files including .dpt files from infrared spectroscopy (IR) data can be opened using Microsoft Excel.

Referenced by

Meyersohn, M. S.; Haque, F. M.; Hillmyer, M. A. Dynamic Aliphatic Polyester Elastomers Crosslinked with Aliphatic Dianhydrides. ACS polymers Au. 2023.
https://doi.org/10.1021/acspolymersau.3c00004.

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CC0 1.0 Universal
http://creativecommons.org/publicdomain/zero/1.0/

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Data Repository for U of M (DRUM)
CSP Research Data

Funding information

CHE-1901635

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Previously Published Citation

Suggested citation

Meyersohn, Marianne S; Haque, Farihah M; Hillmyer, Marc A. (2023). Supporting data for Dynamic Aliphatic Polyester Elastomers Crosslinked with Aliphatic Dianhydrides. Retrieved from the University Digital Conservancy, https://doi.org/10.13020/qewn-zh14.

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