AHMAD, IRAM (2025) Insights into the processing of polymer foaming. [Tesi di dottorato]
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| Tipologia del documento: | Tesi di dottorato |
|---|---|
| Lingua: | English |
| Titolo: | Insights into the processing of polymer foaming |
| Autori: | Autore Email AHMAD, IRAM iramahmad776@gmail.com |
| Data: | 11 Dicembre 2025 |
| Numero di pagine: | 92 |
| Istituzione: | Università degli Studi di Napoli Federico II |
| Dipartimento: | Ingegneria Chimica, dei Materiali e della Produzione Industriale |
| Dottorato: | Ingegneria dei prodotti e dei processi industriali |
| Ciclo di dottorato: | 38 |
| Coordinatore del Corso di dottorato: | nome email D'Anna, Andrea andrea.danna@unina.it |
| Tutor: | nome email Di Maio, Ernesto [non definito] |
| Data: | 11 Dicembre 2025 |
| Numero di pagine: | 92 |
| Parole chiave: | Polymer foams, Physical blowing agents, Morphology, Nucleating agents, and Mechanical properties. |
| Settori scientifico-disciplinari del MIUR: | Area 09 - Ingegneria industriale e dell'informazione > ING-IND/22 - Scienza e tecnologia dei materiali |
| Informazioni aggiuntive: | PhD 38th Cycle |
| Depositato il: | 26 Gen 2026 11:47 |
| Ultima modifica: | 12 Ago 2026 05:37 |
| URI: | https://www.fedoa.unina.it/id/eprint/15979 |
Abstract
Recent advances in polymer foaming technology emphasize the transition from chemical to physical blowing agents, primarily driven by environmental considerations and the need for precise control over cellular morphology. Physical batch foaming processes using supercritical or compressed carbon dioxide are recognized for their ability to produce uniform cellular structures with tailored internal architectures, which are difficult to achieve using conventional chemical methods. This thesis explores the development of environmentally friendly polymer foams through batch physical foaming techniques using CO2 as a "green" blowing agent. It also underlines controlling foam morphology and structure to improve performance and sustainability. First, we evaluated various nucleating agents and processing conditions in the production of PET foam, highlighting optimal parameters for achieving low-density, high-quality foams. Then, the fabrication of multi-layered PLLA foams is presented by CO2 foaming, analyzing the influence of process parameters on internal structures and gas transport mechanisms. Finally, we have investigated novel batch foaming strategies for TPU, with the aim of producing controlled microcellular structures with improved mechanical properties. Future advances are expected to involve the integration of advanced materials and processes to create multi-functional, layered, and highly sustainable polymer foams. The innovative approaches presented pave the way for tailored foam architectures with potential applications across multiple industries, contributing significantly to the field of sustainable polymer engineering.
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