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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Zhou, Ning
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Topics
Publications (4/4 displayed)
- 2024Influence of the γ/γ′ Misfit on the Strain-Age Cracking Resistance of High-γ′ Ni and CoNi Superalloys for Additive Manufacturing
- 2010Phase behavior of polyisoprene-poly(butylene oxide) and poly(ethylene-alt-propylene)-poly(butylene oxide) block copolymerscitations
- 2007Shear flow behavior of a dynamically symmetric polymeric bicontinuous microemulsioncitations
- 2006Mesoporous membrane templated by a polymeric bicontinuous microemulsioncitations
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article
Phase behavior of polyisoprene-poly(butylene oxide) and poly(ethylene-alt-propylene)-poly(butylene oxide) block copolymers
Abstract
<p>We prepared two sets of model polyisoprene-poly(butylene oxide) (PI-b-PBO) and poly(ethylene-alt-propylene)-PBO (PEP-b-PBO) diblock copolymers (molecular weights: 20000 ∼ 60000 g/mol and polydispersity indices <1.1) through anionic polymerization and catalytic hydrogenation. The phase behavior was investigated by rheology and small angle X-ray scattering. A relatively high-molecular-weight (60000 g/mol) PI-b-PBO is still disordered at room temperature. Four ordered morphologies, i.e., lamellae (LAM), hexagonally packed cylinders (HEX), gyroid and hexagonally perforated layers (HPL), were found in the PEP-b-PBO copolymers at PBO volume fractions of 0.49-0.62. Notably, a highly ordered HPL structure was observed in a PEP-b-PBO sample without being subjected to any shear alignment. Very long periods of annealing experiments (up to 16 months) were performed at room temperature to study the complex phase transitions among gyroid, HPL and HEX/LAM in a PEP-b-PBO copolymer.</p>