Living anionic polymerization of 4‐diphenylphosphino styrene for ABC triblock copolymers
| Autor: | Gregory B. Fahs, Alison R. Schultz, Robert B. Moore, Mingtao Chen, Timothy Edward Long |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Polymers and Plastics Small-angle X-ray scattering Organic Chemistry 02 engineering and technology Dynamic mechanical analysis 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Styrene chemistry.chemical_compound Anionic addition polymerization Monomer chemistry Polymer chemistry Materials Chemistry Copolymer Thermoplastic elastomer 0210 nano-technology Living anionic polymerization |
| Zdroj: | Polymer International. 66:52-58 |
| ISSN: | 1097-0126 0959-8103 |
| Popis: | Living anionic polymerization of 4-diphenylphosphino styrene (DPPS) achieved unprecedented poly(S-b-I-b-DPPS) ABC triblock copolymers with predictable molecular weights and narrow polydispersities. In situ FTIR spectroscopy probed the anionic polymerization, monitoring vinyl disappearance during sequential monomer addition for kinetic analysis. Varying the concentration of reinforcing, polystyrenic external blocks enabled diverse compositions with tunable thermomechanical properties and tailored morphology. Dynamic mechanical analysis (DMA) confirmed the presence of microphase separation in the triblock copolymers and revealed a broad temperature range (~100 °C) for a plateau region and onset of flow temperatures above 100 °C. Small-angle X-ray scattering (SAXS) and atomic force microscopy (AFM) collectively revealed solid state morphologies of the triblock copolymers and probed phase separation at the nanoscale. Well-defined poly(S-b-I-b-DPPS) ABC triblock copolymers with tunable structure–property relationships now permit phosphorus-containing thermoplastic elastomers for emerging applications. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text