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This work reports an effective approach for the synthesis of reactive polyesters with pendant phenol groups employing a newly synthesized Meldrum's acid derivative (MAHP) as the monomer through a selective ketene\/hydroxyl addition reaction. The MAHP\u2010based polyester (P\u2010MAHP) shows an inherent viscosity of 0.123 dL g<jats:sup>\u22121<\/jats:sup> (measured in 1\u2010methyl\u20102\u2010pyrrolidinone), a glass transition temperature (T<jats:sub>g<\/jats:sub>) of 30\u00b0C (measured with a differential scanning calorimeter), and a thermal stability of about 240\u00b0C. P\u2010MAHP, like phenolic novolac (PN), is utilized as a crosslinking agent for epoxy compounds. In dynamic mechanical analysis, the P\u2010MAHP\u2010crosslinked epoxy resin (ER_P\u2010MAHP) exhibits a T<jats:sub>g<\/jats:sub> of 102\u00b0C (lower than the value of 155\u00b0C founded with the PN\u2010crosslinked analogue (ER_PN)) and a storage modulus of 2.37\u00a0GPa (higher than the value of 1.85\u00a0GPa found with ER_PN). Moreover, based on the dynamic ester bonds, ER_P\u2010MAHP possesses associactive covalent adaptable networks exhibiting stress relaxation and physical recycling features. The results demonstrate a significant progress on polymer chemistry and synthesis of polymeric materials.<\/jats:p>","DOI":"10.1002\/marc.202500393","type":"journal-article","created":{"date-parts":[[2025,7,7]],"date-time":"2025-07-07T14:05:54Z","timestamp":1751897154000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Synthesis of Reactive Polyesters Possessing Phenol Pendant Groups Through Selective Ketene\/Hydroxyl Addition Reactions"],"prefix":"10.1002","volume":"46","author":[{"given":"Du\u2010Yuan","family":"Hung","sequence":"first","affiliation":[{"name":"Department of Chemical Engineering National Tsing Hua University No. 101, Sec.2, Kuang\u2010Fu Road Hsinchu Taiwan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6535-6169","authenticated-orcid":false,"given":"Ying\u2010Ling","family":"Liu","sequence":"additional","affiliation":[{"name":"Department of Chemical Engineering National Tsing Hua University No. 101, Sec.2, Kuang\u2010Fu Road Hsinchu Taiwan"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2025,7,7]]},"reference":[{"key":"e_1_2_7_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/S1381-5148(97)00126-0"},{"volume-title":"Synthesis and Applications of Copolymers, First Edition. 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