dc.contributor.author | Siljanovska Petreska, Gordana | |
dc.contributor.author | Van Sluijs, Christof | |
dc.contributor.author | Auschra, Clemens | |
dc.contributor.author | Paulis Lumbreras, María | |
dc.date.accessioned | 2020-07-07T09:02:09Z | |
dc.date.available | 2020-07-07T09:02:09Z | |
dc.date.issued | 2020-05-30 | |
dc.identifier.citation | Polymers 12(6) : (2020) // Article ID 1253 | es_ES |
dc.identifier.issn | 2073-4360 | |
dc.identifier.uri | http://hdl.handle.net/10810/45047 | |
dc.description.abstract | AB diblock waterborne copolymers made of styrene (St) and 2-ethylhexyl acrylate (2EHA) were synthesized by means of two-step reversible addition fragmentation chain transfer (RAFT) (mini)emulsion polymerization. Monofunctional asymmetric RAFT agent was used to initiate the polymerization. The hard polystyrene “A” block was synthesized via miniemulsion polymerization followed by 2EHA pre-emulsion feeding to form the soft “B” block. Polymerization kinetics and the evolution of the molecular weight distribution were followed during synthesis of both initial and final block copolymers. DSC measurements of the block copolymers revealed the existence of two glass transition temperatures (Tgs) and thus the occurrence of two-phase systems. Microscopic techniques (atomic force microscopy (AFM) and transmission electron microscopy (TEM)) were used to study the phase separation within the particles in the latex form, after film formation at room temperature cast directly from the latex and after different post-treatments well above the Tg of the hard-polystyrene domains, when complete particle coalescence had occurred. The morphological differences observed after different annealing temperatures were correlated with the mechanical properties analyzed by DMTA measurements. Finally, the differences found in the mechanical properties of the block copolymers annealed at different temperatures were correlated to their heat seal application results. | es_ES |
dc.description.sponsorship | The European Union’s Horizon 2020 research and innovation programme is acknowledged for providing the financial support through the project TRACKWAY-ITN 642514 under the Marie Sklodowska-Curie grant agreement. | es_ES |
dc.language.iso | eng | es_ES |
dc.publisher | MDPI | es_ES |
dc.relation | info:eu-repo/grantAgreement/EC/H2020/642514 | es_ES |
dc.rights | info:eu-repo/semantics/openAccess | es_ES |
dc.rights.uri | http://creativecommons.org/licenses/by/3.0/es/ | |
dc.subject | RAFT | es_ES |
dc.subject | miniemulsion polymerization | es_ES |
dc.subject | AB hard-soft block copolymers | es_ES |
dc.subject | particle and film morphology | es_ES |
dc.subject | heat seal lacquers | es_ES |
dc.title | Design of Waterborne Asymmetric Block Copolymers as Thermoresponsive Materials | es_ES |
dc.type | info:eu-repo/semantics/article | es_ES |
dc.date.updated | 2020-06-30T16:28:03Z | |
dc.identifier.doi | 10.3390/polym12061253 | |
dc.contributor.funder | European Commission | |
dc.departamentoes | Química aplicada | |
dc.departamentoeu | Kimika aplikatua | |