Antiplasticization of polymer materials: Structural aspects and effects on mechanical and diffusion-controlled properties
Antiplasticization of glassy polymers, arising from the addition of small amounts of plasticizer, was examined to highlight the developments that have taken place over the last few decades, aiming to fill gaps of knowledge in the large number of disjointed publications. The analysis includes the rol...
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rr-article-125199862020-06-22T08:33:11Z Antiplasticization of polymer materials: Structural aspects and effects on mechanical and diffusion-controlled properties Leno Mascia (1248504) Ioannis Kouparitsas (3124704) Davide Nocita (7125848) Xujin Bao (1250676) antiplasticization carbohydrate glassy polymers membrane pharmaceutical physical ageing plasticizer Science & Technology Physical Sciences Polymer Science GLASS-TRANSITION TEMPERATURE CARBON-DIOXIDE PLASTICIZATION SECONDARY LOSS TRANSITIONS STARCH-WATER SYSTEMS FREE-VOLUME POSITRON-ANNIHILATION GAS SORPTION THERMODYNAMIC ASPECTS ATOMISTIC SIMULATION ANTI-PLASTICIZATION Chemical Sciences Engineering Antiplasticization of glassy polymers, arising from the addition of small amounts of plasticizer, was examined to highlight the developments that have taken place over the last few decades, aiming to fill gaps of knowledge in the large number of disjointed publications. The analysis includes the role of polymer/plasticizer molecular interactions and the conditions leading to the cross-over from antiplasticization to plasticization. This was based on molecular dynamics considerations of thermal transitions and related relaxation spectra, alongside the deviation of free volumes from the additivity rule. Useful insights were gained from an analysis of data on molecular glasses, including the implications of the glass fragility concept. The effects of molecular packing resulting from antiplasticization are also discussed in the context of physical ageing. These include considerations on the effects on mechanical properties and diffusion-controlled behaviour. Some peculiar features of antiplasticization regarding changes in Tg were probed and the effects of water were examined, both as a single component and in combination with other plasticizers to illustrate the role of intermolecular forces. The analysis has also brought to light the shortcomings of existing theories for disregarding the dual cross-over from antiplasticization to plasticization with respect to modulus variation with temperature and for not addressing failure related properties, such as yielding, crazing and fracture toughness. 2020-06-22T08:33:11Z Text Journal contribution 2134/12519986.v1 https://figshare.com/articles/journal_contribution/Antiplasticization_of_polymer_materials_Structural_aspects_and_effects_on_mechanical_and_diffusion-controlled_properties/12519986 CC BY-NC-ND 4.0 |
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| topic |
antiplasticization carbohydrate glassy polymers membrane pharmaceutical physical ageing plasticizer Science & Technology Physical Sciences Polymer Science GLASS-TRANSITION TEMPERATURE CARBON-DIOXIDE PLASTICIZATION SECONDARY LOSS TRANSITIONS STARCH-WATER SYSTEMS FREE-VOLUME POSITRON-ANNIHILATION GAS SORPTION THERMODYNAMIC ASPECTS ATOMISTIC SIMULATION ANTI-PLASTICIZATION Chemical Sciences Engineering |
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antiplasticization carbohydrate glassy polymers membrane pharmaceutical physical ageing plasticizer Science & Technology Physical Sciences Polymer Science GLASS-TRANSITION TEMPERATURE CARBON-DIOXIDE PLASTICIZATION SECONDARY LOSS TRANSITIONS STARCH-WATER SYSTEMS FREE-VOLUME POSITRON-ANNIHILATION GAS SORPTION THERMODYNAMIC ASPECTS ATOMISTIC SIMULATION ANTI-PLASTICIZATION Chemical Sciences Engineering Leno Mascia Ioannis Kouparitsas Davide Nocita Xujin Bao Antiplasticization of polymer materials: Structural aspects and effects on mechanical and diffusion-controlled properties |
| description |
Antiplasticization of glassy polymers, arising from the addition of small amounts of plasticizer, was examined to highlight the developments that have taken place over the last few decades, aiming to fill gaps of knowledge in the large number of disjointed publications. The analysis includes the role of polymer/plasticizer molecular interactions and the conditions leading to the cross-over from antiplasticization to plasticization. This was based on molecular dynamics considerations of thermal transitions and related relaxation spectra, alongside the deviation of free volumes from the additivity rule. Useful insights were gained from an analysis of data on molecular glasses, including the implications of the glass fragility concept. The effects of molecular packing resulting from antiplasticization are also discussed in the context of physical ageing. These include considerations on the effects on mechanical properties and diffusion-controlled behaviour. Some peculiar features of antiplasticization regarding changes in Tg were probed and the effects of water were examined, both as a single component and in combination with other plasticizers to illustrate the role of intermolecular forces. The analysis has also brought to light the shortcomings of existing theories for disregarding the dual cross-over from antiplasticization to plasticization with respect to modulus variation with temperature and for not addressing failure related properties, such as yielding, crazing and fracture toughness. |
| format |
Default Article |
| author |
Leno Mascia Ioannis Kouparitsas Davide Nocita Xujin Bao |
| author_facet |
Leno Mascia Ioannis Kouparitsas Davide Nocita Xujin Bao |
| author_sort |
Leno Mascia (1248504) |
| title |
Antiplasticization of polymer materials: Structural aspects and effects on mechanical and diffusion-controlled properties |
| title_short |
Antiplasticization of polymer materials: Structural aspects and effects on mechanical and diffusion-controlled properties |
| title_full |
Antiplasticization of polymer materials: Structural aspects and effects on mechanical and diffusion-controlled properties |
| title_fullStr |
Antiplasticization of polymer materials: Structural aspects and effects on mechanical and diffusion-controlled properties |
| title_full_unstemmed |
Antiplasticization of polymer materials: Structural aspects and effects on mechanical and diffusion-controlled properties |
| title_sort |
antiplasticization of polymer materials: structural aspects and effects on mechanical and diffusion-controlled properties |
| publishDate |
2020 |
| url |
https://hdl.handle.net/2134/12519986.v1 |
| _version_ |
1797459918665547776 |