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Rapid Commun."],"published-print":{"date-parts":[[2024,6]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>\n                    The melt memory effect on crystallization is an intriguing phenomenon displayed by semicrystalline polymers, as opposed to low molar mass molecules. It concerns the effect of melt temperature on nucleation upon recrystallization. Typically, polymer crystals must be considerably superheated to erase the effect of previous morphology on the subsequent crystallization, avoiding an acceleration of the process. Despite being known for decades, its origin is still not fully understood. Investigating model poly(ethylene oxide) covering a wide range of molar mass, it is demonstrated that melt memory originates from topological constraints among the chains, i.e., entanglements, for PEO in which weak intermolecular interactions are present due to the ether groups. In fact, no memory is observed for samples below the critical molar mass for the formation of entanglements (about 1 kg mol\n                    <jats:sup>\u22121<\/jats:sup>\n                    ). The increase in molar mass raises the number of entanglements and induces the formation of folded chains crystals, both factors leading to a topologically complex amorphous phase, enhancing the melt memory effect. The molecular origin of the melt memory effect in polymers with weak intermolecular interactions is thus ascribed to a slower isotropization in the melt of the chain segments originally contained in the crystals, due to the presence of entanglements among the chains. This study defines the distinction between small molecules and polymers from the point of view of melt memory.\n                  <\/jats:p>","DOI":"10.1002\/marc.202400011","type":"journal-article","created":{"date-parts":[[2024,3,24]],"date-time":"2024-03-24T03:09:36Z","timestamp":1711249776000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":28,"title":["Origin of Melt Memory Effects in Poly(ethylene oxide): The Crucial Role of Entanglements"],"prefix":"10.1002","volume":"45","author":[{"given":"Leire","family":"Sangroniz","sequence":"first","affiliation":[{"name":"Department of Chemistry and Industrial Chemistry University of Genova  Via Dodecaneso 31 Genova 16146 Italy"},{"name":"POLYMAT and Department of Polymers and Advanced Materials: Physics Chemistry and Technology Faculty of Chemistry University of the Basque Country UPV\/EHU  Paseo Manuel de Lardiz\u00e1bal 3 Donostia\u2010San Sebasti\u00e1n 20018 Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alejandro J.","family":"M\u00fcller","sequence":"additional","affiliation":[{"name":"POLYMAT and Department of Polymers and Advanced Materials: Physics Chemistry and Technology Faculty of Chemistry University of the Basque Country UPV\/EHU  Paseo Manuel de Lardiz\u00e1bal 3 Donostia\u2010San Sebasti\u00e1n 20018 Spain"},{"name":"IKERBASQUE Basque Foundation for Science  Plaza Euskadi 5 Bilbao 48009 Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dario","family":"Cavallo","sequence":"additional","affiliation":[{"name":"Department of Chemistry and Industrial Chemistry University of Genova  Via Dodecaneso 31 Genova 16146 Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2024,4,3]]},"reference":[{"key":"e_1_2_8_1_1","volume-title":"Progress in Understanding of Polymer Crystallization","author":"Reiter G.","year":"2006"},{"key":"e_1_2_8_2_1","volume-title":"Polymer Crystallization: The Development of Crystalline Order in Thermoplastic Polymers","author":"Schultz J. 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