ABSTRACT The relaxation of the local conformation of ethylene-propylene-diene terpolymer (EPDM) rubber at the quartz interface was examined by sum frequency generation (SFG) spectroscopy in

conjunction with all-atom molecular dynamics (MD) simulations. At room temperature, SFG peaks due to the CH symmetric stretching vibration of methyl (CH3s) and methylene (CH2s) groups were

observed, and the intensity was stronger for CH3s than for CH2s. The CH3s to CH2s intensity ratio was reversed during the heating process, meaning that the local conformation of EPDM at the

interface changed. MD simulations revealed that the fraction of ethylene units in the trans conformation on the substrate surface decreased once the temperature was greater the interfacial

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support SIMILAR CONTENT BEING VIEWED BY OTHERS VISCOELASTIC RELAXATION ATTRIBUTED TO THE MOLECULAR DYNAMICS OF POLYROTAXANE CONFINED IN AN EPOXY RESIN NETWORK Article 12 June 2020

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silica surfaces. Langmuir. 2001;17:4329–35. Article  CAS  Google Scholar  Download references ACKNOWLEDGEMENTS We wish to thank Prof. Daisuke Kawaguchi of Kyushu University for fruitful

discussions and are also grateful for support from the JST-Mirai Program (JPMJMI18A2). The authors also thank Mr. Kotaro Ichino (Mitsui Chemicals Inc.) for his great cooperation in our

research. AUTHOR INFORMATION AUTHORS AND AFFILIATIONS * Mitsui Chemicals Inc., Chiba, 299-0265, Japan Kiminori Uchida & Kazuki Mita * Department of Applied Chemistry, Kyushu University,

Fukuoka, 819-0395, Japan Kiminori Uchida & Keiji Tanaka * Comprehensive Research Organization for Science and Society (CROSS), Tokai, Ibaraki, 319-1106, Japan Kazuki Mita * Center for

Polymer Interface and Molecular Adhesion Science, Kyushu University, Fukuoka, 819-0395, Japan Satoru Yamamoto & Keiji Tanaka Authors * Kiminori Uchida View author publications You can

also search for this author inPubMed Google Scholar * Kazuki Mita View author publications You can also search for this author inPubMed Google Scholar * Satoru Yamamoto View author

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AUTHORS Correspondence to Kiminori Uchida, Satoru Yamamoto or Keiji Tanaka. ETHICS DECLARATIONS CONFLICT OF INTEREST The authors declare no competing interests. ADDITIONAL INFORMATION

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permissions ABOUT THIS ARTICLE CITE THIS ARTICLE Uchida, K., Mita, K., Yamamoto, S. _et al._ Conformational relaxation of ethylene-propylene-diene terpolymer at a solid interface. _Polym J_

55, 683–690 (2023). https://doi.org/10.1038/s41428-023-00764-x Download citation * Received: 26 December 2022 * Revised: 28 January 2023 * Accepted: 29 January 2023 * Published: 02 March

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