Towards improved performance of waterborne polymer dispersions through creation of dense ionic interparticle network within their films
| العنوان: | Towards improved performance of waterborne polymer dispersions through creation of dense ionic interparticle network within their films |
|---|---|
| المؤلفون: | Maialen Argaiz, Miren Aguirre, Radmila Tomovska |
| بيانات النشر: | Elsevier, 2023. |
| سنة النشر: | 2023 |
| مصطلحات موضوعية: | waterborne, Polymers and Plastics, Organic Chemistry, emulsion polymerization, Materials Chemistry, inter-particle complexation, iItaconic acid, styrenic DABCO, ionic complexation |
| الوصف: | To overcome the main challenge of low performance of the waterborne polymer coatings due to the particulate nature of the polymer dispersions and the complex film formation process, in this work we implemented the strategy of ionic complexation between oppositely charged waterborne polymer particles. For that aim, doubled charged ionic monomers ithaconic acid (IA) and styrenic 1,4-diazabicyclo[2.2.2]octane (DABCO) were used to densely functionalize (meth)acrylic film forming polymer particles, synthesized by seeded semi-batch emulsion polymerization to produce high solids content anionically and cationically charged polymer dispersions, respectively. The main advantage of the double charges in the selected ionic monomers is that they provide high ionic charge density onto charged particles at lower content of ionic monomers. The blending of these oppositely, densely charged and concentrated dispersions resulted in instantaneous coagulation. To postpone the immediate complexation, water-soluble non-ionic polymeric stabilizing species as steric obstacles around the colloids were employed, which allowed to prepare colloidally stable blends and to prepare ionic complexed films. Certainly, the established ionic complexes between carboxylic acids of IA anionic monomer and quaternary ammonium groups of DABCO units within the films improved substantially the mechanical properties and the water sensitivity of the ionic complexed polymeric films with respect to individual films and the reference blend, in which ionic bonding was prevented by pH control. Moreover, the dense ionic network formed within the film actuated as a strong barrier to the leakage of all the water-soluble species during film immersion in water. Beside simple strategy towards improved performance of waterborne coatings, these results offer further extension of their application potential. The authors would like to acknowledge the financial support provided by the Industrial Liaison Program in Polymerization in Dispersed Media (Akzo Nobel, Allnex, Arkema, Asian Paints, BASF, Covestro, Elix Polymers, Inovyn, Organik Kimya, Sherwin Williams, Stahl, Synthomer, Tesa, Vinavil, and Wacker) and the Sgiker Services of the University of the Basque Country. |
| وصف الملف: | application/pdf |
| اللغة: | English |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a88b5dba393add418d3ed8017d37db3c http://hdl.handle.net/10810/59717 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....a88b5dba393add418d3ed8017d37db3c |
| قاعدة البيانات: | OpenAIRE |
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