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Rapid Commun."],"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>\n                    This work demonstrates successful grafting of\n                    <jats:italic>N<\/jats:italic>\n                    \u2010hydroxyethyl acrylamide (HEAA) onto poly[(\n                    <jats:italic>R<\/jats:italic>\n                    )\u20103\u2010hydroxybutyrate] (P[(\n                    <jats:italic>R<\/jats:italic>\n                    )\u20103HB]), up to 156 wt.% using\n                    <jats:sup>60<\/jats:sup>\n                    Co gamma irradiation (10.1 kGy) and a 1:4 P[(\n                    <jats:italic>R<\/jats:italic>\n                    )\u20103HB]:HEAA molar ratio in ethyl acetate. The resulting\n                    <jats:italic>N<\/jats:italic>\n                    \u2010hydroxyethyl acrylamide\u2010grafted poly[(\n                    <jats:italic>R<\/jats:italic>\n                    )\u20103\u2010hydroxybutyrate] (P3HB\u2010HEAA) was comprehensively characterized using FTIR, NMR, SEM, DSC, TGA\/DTG, tensile testing, and water uptake, and exhibited striking property changes relative to the native polymer. The modified material showed a\n                    <jats:italic>\n                      T\n                      <jats:sub>g<\/jats:sub>\n                    <\/jats:italic>\n                    of 124\u00b0C, reduced melting enthalpy (\n                    <jats:italic>\n                      \u0394H\n                      <jats:sub>m<\/jats:sub>\n                    <\/jats:italic>\n                    = 12 J\/g), increased\n                    <jats:italic>\n                      T\n                      <jats:sub>d,10<\/jats:sub>\n                    <\/jats:italic>\n                    and\n                    <jats:italic>\n                      T\n                      <jats:sub>d,50<\/jats:sub>\n                    <\/jats:italic>\n                    of 260\u00b0C and 340\u00b0C, respectively, increased elongation at break (\u025b = 65%), increased toughness (by 378%), exceptional water absorption capacity (610 wt.%), a markedly less ordered surface structure compared to the starting materials. These changes indicate formation of a less crystalline, highly hygroscopic, hydrogel\u2010like system. HEAA grafting generated a biphasic architecture comprising a semicrystalline, structurally robust, P[(\n                    <jats:italic>R<\/jats:italic>\n                    )\u20103HB] backbone coupled with an amorphous, hydrogel\u2010like HEAA surface layer, yielding a potentially biodegradable polymer with enhanced hydration capacity. The structure retains structural integrity while enabling substantial water uptake properties not accessible with either component alone. Combining mechanical strength with tuneable hydration behavior, HEAA\u2010grafted P[(\n                    <jats:italic>R<\/jats:italic>\n                    )\u20103HB] expands the functional and commercial potential of P[(\n                    <jats:italic>R<\/jats:italic>\n                    )\u20103HB] into applications requiring simultaneous structural integrity, controlled swelling, and potential biocompatibility.\n                  <\/jats:p>","DOI":"10.1002\/marc.70453","type":"journal-article","created":{"date-parts":[[2026,10,9]],"date-time":"2026-10-09T04:20:19Z","timestamp":1791519619000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Gamma Irradiation\u2010Based Free Radical Grafting of\n                    <i>N<\/i>\n                    \u2010Hydroxyethyl Acrylamide onto Poly[(\n                    <i>R<\/i>\n                    )\u20103\u2010hydroxybutyrate]"],"prefix":"10.1002","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2213-3686","authenticated-orcid":false,"given":"Cole","family":"Walchle","sequence":"first","affiliation":[{"name":"School of Chemical Engineering The University of Queensland  Brisbane Queensland Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0403-7236","authenticated-orcid":false,"given":"C\u00e9line","family":"Chal\u00e9at","sequence":"additional","affiliation":[{"name":"School of Chemical Engineering The University of Queensland  Brisbane Queensland Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Paul","family":"Lant","sequence":"additional","affiliation":[{"name":"School of Chemical Engineering The University of Queensland  Brisbane Queensland 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