Morphology Control of Poly(styrene-block-dimethylsiloxane) by Simple Blending with Trimethylsilylated Silicate Nanoparticles
| Autor: | Chengqing Wang, Steven Swier, Hae-Jeong Lee, Ginam Kim |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Morphology (linguistics) Polymers and Plastics Organic Chemistry Dispersity Nanoparticle 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Silicate 0104 chemical sciences Styrene Inorganic Chemistry chemistry.chemical_compound chemistry Chemical engineering Phase (matter) Polymer chemistry Volume fraction Materials Chemistry Copolymer 0210 nano-technology |
| Zdroj: | Macromolecules. 49:7370-7378 |
| ISSN: | 1520-5835 0024-9297 |
| DOI: | 10.1021/acs.macromol.6b01350 |
| Popis: | Trimethylsilylated silicate nanoparticle (termed MQ resin, combining M Me3SiO1/2 and Q SiO4/2 units)/poly(styrene-block-polydimethylsiloxane) (PS–PDMS, 31K–15K, polydispersity PD = 1.15, weight-average molecular weight Mw = 45.5K) blends behave similarly to block copolymers with different PS/PDMS ratios. MQ is localized in the PDMS phase virtually extending the volume fraction in the block copolymer. This allows for microdomain morphology control beyond what can be achieved with the starting block copolymer. Synthesizing siloxane-containing block copolymers targeted at certain equilibrium morphologies can be time-consuming and in some cases technically challenging. This work shows that MQ is a robust morphology modifier, not limited by the occurrence of surface segregation and the high diffusion rates typically associated with homopolymer modification, as confirmed by looking at the PDMS/PS–PDMS reference. The convenient and robust structure control MQ nanoparticle modification of PS–PDMS provides could o... |
| Databáze: | OpenAIRE |
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