Crystallization behavior of nanocomposites based on poly(l-lactide) and MgAl layered double hydroxides – Unbiased determination of the rigid amorphous phases due to the crystals and the nanofiller
| Autor: | Jing Leng, Andreas Wurm, Andreas Schönhals, Nian-Jun Kang, De-Yi Wang, Christoph Schick |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Nanocomposite Polymers and Plastics Polymer nanocomposite Organic Chemistry Layered double hydroxides 02 engineering and technology engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Amorphous solid law.invention Crystal Crystallinity law Materials Chemistry engineering Crystallite Composite material Crystallization 0210 nano-technology |
| Zdroj: | Polymer. 108:257-264 |
| ISSN: | 0032-3861 |
| DOI: | 10.1016/j.polymer.2016.11.065 |
| Popis: | Semicrystalline polymers have to be described by a three phase model consisting of a mobile amorphous (MAF), a crystalline (CF), and a rigid amorphous fraction (RAF). For nanocomposites based on a semicrystalline polymer the RAF is due to both the crystallites (RAF crystal ) and the filler (RAF filler ). Polymer nanocomposite based on poly( l -lactide) and MgAl layered double hydroxide nanofiller were prepared. Due to the low crystallization rate of PLA its crystallization can be suppressed by a high enough cooling rate, and the RAF is due only to the nanofiller. The MAF, CF, and RAF were estimated by Temperature Modulated DSC. For the first time CF, MAF, RAF crystal , and RAF filler could be estimated. It was found, that RAF filler increases linearly with the concentration of the nanofiller for this system. Furthermore, RAF crystal is only slightly influenced by the presence of the nanofiller. |
| Databáze: | OpenAIRE |
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