|Title:||Facile approach for rapid self-assembly of rod-coil block copolymers||Authors:||SHIH-HUANG TUNG
|Keywords:||Additives; Nanostructure; Rod-coil block copolymers; Self-assembly; Vacuum annealing||Issue Date:||Mar-2018||Source:||Polymer||Abstract:||
Rod-coil block copolymers (BCPs) can self-assemble into nanostructures that are useful for the fabrication of nanodevices. However, BCPs are generally difficult to self-assemble into highly ordered nanostructures due to their low chain mobility and strong rod-rod interaction. A facile approach is developed to achieve rapid self-assembly of rod-coil BCPs by blending them with selective additive and annealing in vacuum. Poly(diethyl hexyl oxy-p-phenylene vinylene)-b-poly(methyl methacrylate) (DEHPPV-b-PMMA or PVM) was used as a model copolymer to validate this approach. By adding 30 wt% of a rod-selective additive, p-phenylene vinylene (PV), into the PVM containing 67% (v/v) PMMA, the copolymer can easily self-assemble into lamellae structure at 150 °C for 1.5hr under 0.05 torr. This is a significant improvement over the 200 °C for 60 h for the sample without additive and vacuum annealing. This energy conservation process should have broad application in the fabrication of highly ordered nanostructure using BCPs. © 2018 Elsevier Ltd
|DOI:||10.1016/j.polymer.2018.01.088||SDG/Keyword:||Additives; Annealing; Aromatic compounds; Blending; Esters; Nanostructures; Self assembly; Annealing in vacuum; Broad application; Lamellae structures; Ordered nanostructures; P-phenylene vinylene; Rapid self assembly; Rod-coil block copolymer; Vacuum-annealing; Block copolymers
|Appears in Collections:||高分子科學與工程學研究所|
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