Tuned phase behavior of weakly interacting polystyrene-block-poly(n-pentyl methacrylate) by selective solvent
作者： Hong Chul Moon , Chaoxu Li , Sung Hyun Han , Jongheon Kwak , Jin Kon Kim
DOI: 10.1016/J.POLYMER.2013.12.052
关键词:
摘要: Abstract We investigated, via small angle X-ray scattering, depolarized light rheometry, and transmission electron microscopy, the phase behavior of mixture a symmetric polystyrene-block-poly(n-pentyl methacrylate) copolymer (PS-b-PnPMA) showing closed-loop excellent baroplasticity, dodecanol, PnPMA-selective solvent. found that addition selective solvent is simple, but very effective to obtain various microdomains including hexagonally packed cylinders gyroids. Also, with increasing temperature, mixtures showed multiple ordered-to-ordered transitions (OOTs) in upper ordered-to-disordered transition (UODT). The first observation gyroid PS-b-PnPMA important, although they have been widely reported many block copolymers, for instance, PS-block-polyisoprene (PS-b-PI) PS-block-poly( d , l -lactide) (PS-b-PLA). Since show external pressure instead temperature could easily change microdomains.
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