{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,6]],"date-time":"2026-05-06T03:35:47Z","timestamp":1778038547417,"version":"3.51.4"},"reference-count":27,"publisher":"MDPI AG","issue":"12","license":[{"start":{"date-parts":[[2022,6,9]],"date-time":"2022-06-09T00:00:00Z","timestamp":1654732800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Deutsche Forschungsgemeinschaft (DFG, German Research Foundation)","award":["AL 474\/40-1\/SCHL 280\/40-1"],"award-info":[{"award-number":["AL 474\/40-1\/SCHL 280\/40-1"]}]},{"name":"Deutsche Forschungsgemeinschaft (DFG, German Research Foundation)","award":["391977956\u2014SFB 1357"],"award-info":[{"award-number":["391977956\u2014SFB 1357"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Materials"],"abstract":"<jats:p>Environmental stress cracking (ESC) is one of the most prominent failure mechanisms for polymer components. The high sensitivity of plastics in regard to environmental influences has always meant that plastics as materials have been viewed very critically in outdoor applications. Recently, the massive occurrence of microplastics in the environment means that questions about the long-term stability of plastic parts and the studies of plastic fragmentation are of great scientific interest. ESC behavior also plays an important role in connection with the formation of microplastics. In this work, the influence of two different sample wetting methods on ESC behavior was investigated. In case A, the sample was in situ wetted with the medium during the measurement by using a sponge. In case B, the sample was wetted by storage in the medium prior to measurement. Different stress cracking agents (SCA) were examined for polymethylmethacrylate (PMMA). Fracture-mechanical fatigue crack propagation (FCP) tests were carried out to quantitatively determine the sensitivity to ESC. Correlations between the absorption behavior and the ESC behavior of the SCA and the resulting morphological phenomena were established. Depending on the wetting method, significant differences in FCP were observed. The in situ wetting of the samples (case A) during the FCP measurement with ethylene glycol (EG) and with deionized water (DI) led to a significant shift in the crack propagation curves to higher \u2206K\u2014compared to the PMMA reference. In the case of n-heptane (NH), a more brittle crack propagation behavior was observed due to the chemical interaction with PMMA. The previously immersed samples (case B) give different results. Storage in NH and EG showed no influence on the crack propagation behavior. Samples immersed in DI showed a completely different course of crack growth. At a certain load, a sudden deceleration of the crack propagation and thus a horizontal curve could be seen. Above a certain \u2206K value, crack growth began again. Depending on the immersion time (14, 30, or 60 days), this so-called stepped behavior shifted to lower da\/dN values.<\/jats:p>","DOI":"10.3390\/ma15124114","type":"journal-article","created":{"date-parts":[[2022,6,12]],"date-time":"2022-06-12T09:26:48Z","timestamp":1655026008000},"page":"4114","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["Influence of Sample Wetting Method on ESC-Behavior of PMMA under Dynamic Fatigue Crack Propagation"],"prefix":"10.3390","volume":"15","author":[{"given":"Tobias","family":"Bubmann","sequence":"first","affiliation":[{"name":"Department of Polymer Engineering, University of Bayreuth, Universit\u00e4tsstra\u00dfe 30, 95447 Bayreuth, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Simon","family":"Shi","sequence":"additional","affiliation":[{"name":"Chair of Composite Engineering (CCe), Technische Universit\u00e4t Kaiserslautern (TUK), 67663 Kaiserslautern, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Alexander","family":"Brueckner","sequence":"additional","affiliation":[{"name":"Department of Polymer Engineering, University of Bayreuth, Universit\u00e4tsstra\u00dfe 30, 95447 Bayreuth, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Teresa","family":"Menzel","sequence":"additional","affiliation":[{"name":"Department of Polymer Engineering, University of Bayreuth, Universit\u00e4tsstra\u00dfe 30, 95447 Bayreuth, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Holger","family":"Ruckd\u00e4schel","sequence":"additional","affiliation":[{"name":"Department of Polymer Engineering, University of Bayreuth, Universit\u00e4tsstra\u00dfe 30, 95447 Bayreuth, Germany"},{"name":"Bavarian Polymer Institute and Bayreuth Institute of Macromolecular Research, University of Bayreuth, Universit\u00e4tsstra\u00dfe 30, 95447 Bayreuth, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8693-9163","authenticated-orcid":false,"given":"Alois K.","family":"Schlarb","sequence":"additional","affiliation":[{"name":"Chair of Composite Engineering (CCe), Technische Universit\u00e4t Kaiserslautern (TUK), 67663 Kaiserslautern, Germany"},{"name":"Research Center OPTIMAS, Technische Universit\u00e4t Kaiserslautern (TUK), 67663 Kaiserslautern, Germany"},{"name":"Key Laboratory of Rubber-Plastics, School of Polymer Science and Engineering, Qingdao University of Science and Technology (QUST), Qingdao 266042, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0312-6226","authenticated-orcid":false,"given":"Volker","family":"Altst\u00e4dt","sequence":"additional","affiliation":[{"name":"Department of Polymer Engineering, University of Bayreuth, Universit\u00e4tsstra\u00dfe 30, 95447 Bayreuth, Germany"},{"name":"Bavarian Polymer Institute and Bayreuth Institute of Macromolecular Research, University of Bayreuth, Universit\u00e4tsstra\u00dfe 30, 95447 Bayreuth, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2022,6,9]]},"reference":[{"key":"ref_1","unstructured":"Wright, D.C. 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Fract."}],"container-title":["Materials"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1996-1944\/15\/12\/4114\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T23:27:12Z","timestamp":1760138832000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1996-1944\/15\/12\/4114"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2022,6,9]]},"references-count":27,"journal-issue":{"issue":"12","published-online":{"date-parts":[[2022,6]]}},"alternative-id":["ma15124114"],"URL":"https:\/\/doi.org\/10.3390\/ma15124114","relation":{},"ISSN":["1996-1944"],"issn-type":[{"value":"1996-1944","type":"electronic"}],"subject":[],"published":{"date-parts":[[2022,6,9]]}}}