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It is demonstrated that the shift in Tg (\u0394Tg= Tgfilm \u2212 Tgbulk) exhibits a consistent linear dependence on the degree of adsorption (hads\/hadseq) across PS films with different Mw on a given substrate, described by \u0394Tg = khads\/hadseq + b. The slope k is found to be independent of the substrate, whereas the intercept b increases with the increasing polymer\/substrate interactions due to additional losses in interfacial free volume arising from more densely packed adsorbed conformations. In addition, the dependence of the Tg-confinement effect on Mw is observed under non-equilibrium adsorption conditions caused by Mw-dependent adsorption kinetics. These results provide physical insights into how chain adsorption, which is strongly modulated by polymer\/substrate interactions, affects the Tg-confinement effect in polymer thin films.<\/jats:p>","DOI":"10.1063\/5.0300833","type":"journal-article","created":{"date-parts":[[2026,1,2]],"date-time":"2026-01-02T11:33:30Z","timestamp":1767353610000},"update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":0,"title":["Combined effects of polymer\/substrate interaction and chain adsorption on the\n                    <i>T<\/i>\n                    g-confinement effect of supported thin polystyrene films"],"prefix":"10.1063","volume":"164","author":[{"ORCID":"https:\/\/orcid.org\/0009-0006-6357-1558","authenticated-orcid":false,"given":"Lu","family":"Bai","sequence":"first","affiliation":[{"name":"Key Laboratory of Surface and Interface Science of Polymer Materials of Zhejiang Province, Department of Chemistry, Zhejiang Sci-Tech University , Hangzhou 310018,","place":["People\u2019s Republic of China"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0009-0008-7070-4819","authenticated-orcid":false,"given":"Weizhao","family":"Ren","sequence":"additional","affiliation":[{"name":"Key Laboratory of Surface and Interface Science of Polymer Materials of Zhejiang Province, Department of Chemistry, Zhejiang Sci-Tech University , Hangzhou 310018,","place":["People\u2019s Republic of China"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xiaonan","family":"Li","sequence":"additional","affiliation":[{"name":"Key Laboratory of Surface and Interface Science of Polymer Materials of Zhejiang Province, Department of Chemistry, Zhejiang Sci-Tech University , Hangzhou 310018,","place":["People\u2019s Republic of China"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8554-8400","authenticated-orcid":false,"given":"Jianquan","family":"Xu","sequence":"additional","affiliation":[{"name":"Key Laboratory of Surface and Interface Science of Polymer Materials of Zhejiang Province, Department of Chemistry, Zhejiang Sci-Tech University , Hangzhou 310018,","place":["People\u2019s Republic of China"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9269-3275","authenticated-orcid":false,"given":"Xinping","family":"Wang","sequence":"additional","affiliation":[{"name":"Key Laboratory of Surface and Interface Science of Polymer Materials of Zhejiang Province, Department of Chemistry, Zhejiang Sci-Tech University , Hangzhou 310018,","place":["People\u2019s Republic of China"]}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"317","published-online":{"date-parts":[[2026,1,2]]},"reference":[{"key":"2026010206332950200_c1","doi-asserted-by":"publisher","first-page":"58","DOI":"10.1002\/anie.200702506","volume":"47","year":"2008","journal-title":"Angew. 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