Crystallization-induced structure fluctuation of crystallized microdomain structure composed of strongly segregated crystalline-crystalline diblock copolymers

RAFT Polymerization-Induced Self-Assembly as a Strategy for Versatile Synthesis of Semifluorinated Liquid-Crystalline Block Copolymer Nanoobjects

“…22 Diffraction peaks at 19°and 23.5°due to PEG crystalline domains are also clearly assigned. 50 The phase transition temperatures, i.e., LC to isotropic liquid transition (85 °C) for PHDFDMA and melting point (61 °C) of PEG, are also consistent with literature values and further confirm the crystalline nature of PEG-PHDFDMA BCPs synthesized by PISA. 50 The PEG 113 -PHDFDMA x BCP nanoparticles synthesized in ethanol can be dispersed into a wide range of solvents commonly used in the laboratory, including DMF, DMSO, acetone, acetonitrile, ethyl acetate, 1,4-dioxane, CH 2 Cl 2 , CHCl 3 , THF, toluene, and trifluoroethanol.…”

Recent progress in block copolymer crystallization

“…The rigidity of the mesogenic portion imparts the rod‐like chain structure. Here, crystallization of the coil block is influenced by the phase behavior of the ordered microphase separation as well as the rigidity of the LC block . LC properties of these materials will not be discussed.…”

“…Steric interaction of LC block mesogens provides long persistence lengths that give the LC block rigid, rod‐like properties similar to conjugated polymer backbones. Some studies have been performed looking at the influence of these LC blocks on the crystallization of PCL blocks, PEO blocks, and PLLA …”

“…Bulk properties have been studied for PEO and PLLA . Poly(perfluorooctylethyl acrylate) (PFA‐C 8 ) is an LC polymer that exhibits a highly ordered smectic phase that resembles a disordered crystal phase due to low mobility .…”

“…Studies with strongly segregated, lamellar PFA‐C 8 ‐ b ‐PEO ( f PEO = 0.44) found that PEO crystallization ( T m PEO , crystallinity, and kinetics) was influenced by the low mobility of the PFA‐C 8 phase similar to other studies of rod‐coil BCPs mentioned in this review. Nojima et al . found that in early stage isothermal crystallization of PFA‐C 8 ‐ b ‐PEO after quenching to T c PEO (Figure , 1″), there was three‐dimensional growth of PEO lamellar crystals within a microphase‐separated morphology.…”