Size control of aromatic polyamide hollow spheres prepared by reaction-induced phase separation
| Autor: | Tetsuya Uchida, Hirofumi Nakayama, Naoto Adachi, Hironori Atarashi, Kunio Kimura, Shinichi Yamazaki |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Polymers and Plastics Liquid paraffin Organic Chemistry technology industry and agriculture Nucleation 02 engineering and technology equipment and supplies 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Aramid Solvent Chemical engineering Polymerization Polyamide Polymer chemistry Materials Chemistry Solvent effects Solubility 0210 nano-technology |
| Zdroj: | Polymer. 111:239-243 |
| ISSN: | 0032-3861 |
| DOI: | 10.1016/j.polymer.2017.01.060 |
| Popis: | Size control of the poly (1,4-phenylene-5-hydroxyisophthalamide) hollow spheres was examined by tuning the polymerization condition, focusing on concentration, temperature and solvent. Higher concentration lowered the diameter owing to the higher degree of super-saturation for nucleation. Temperature drop during the polymerization just before the nucleation was so effective to make the diameter smaller. Moreover, the diameter was susceptive to the solubility of oligomers in the solvent, and higher content of liquid paraffin in the aromatic solvent lowered the solubility, resulting in the decrease in the diameter. Based on these results, the combination of the temperature drop and the solvent effect was the most desirable to prepare the smallest hollow spheres, and the diameter of hollow spheres could be controlled from 4.4 to 0.7 μm. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect