Morphology and thermal properties of pseudo interpenetrating polymer networks based on natural rubber (Manihot glaziovii) and poly(methyl methacrylate)
| Autor: | Robério Marcos Alcântara, Ana Paula Pinho Rodrigues, Glaucione Gomes de Barros |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
chemistry.chemical_classification
Molar mass Materials science Morphology (linguistics) Polymers and Plastics Organic Chemistry technology industry and agriculture macromolecular substances Polymer Poly(methyl methacrylate) chemistry.chemical_compound Natural rubber Chemical engineering chemistry Phase (matter) visual_art Polymer chemistry Materials Chemistry visual_art.visual_art_medium Thermal stability Methyl methacrylate |
| Zdroj: | Polymer. 40:1651-1656 |
| ISSN: | 0032-3861 |
| DOI: | 10.1016/s0032-3861(98)00215-8 |
| Popis: | Pseudo interpenetrating polymer networks were prepared by a sequential method using a high molecular weight natural rubber and poly(methyl methacrylate), PMMA. The thermal properties and morphology were investigated varying the average molar mass between crosslinks ( M c ) and the composition. The extent of crosslinking of natural rubber plays a major role in the transitions domains whatever the sample composition. As the crosslink density decreases, only one T g value is observed ( M c of 500 and 1000 g/mol). Comparison between the pseudo IPNs at different M c values and compositions indicates that there are no significant differences in the thermal stabilities of the materials. Crosslinking and the component composition had a strong effect on the morphological patterns of the samples. For a higher crosslink density ( M c =142 g/mol), close and compact phase domains can be seen. The morphologies for lower crosslink densities ( M c of 500 and 1000 g/mol) showed fibrillar domains characteristic of the PMMA. |
| Databáze: | OpenAIRE |
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