Factors controlling the structure of syndiotactic polystyrene upon the guest exchange and guest extraction processes

Microporous-crystalline microfibers by eco-friendly guests: An efficient tool for sorption of volatile organic pollutants

“…The complete removal of EA (boiling point = 77 °C) from the same 3 µm fibers requires, instead, extraction procedures by liquid acetonitrile [27,46] or by supercritical CO 2 [47][48][49]. Table 1.…”

Progressive Relaxation Behavior and Relaxation Dynamics of sPS Gels upon Controlled Heating

“…As a high stereoregularity polymer, syndiotactic polystyrene (sPS) has attracted long-standing interest because of its high melting point, fast crystallization rate, and good chemical stability [ 1 ]. The polymorphic behaviors related to different molecular conformations and different chain packing structures have been extensively studied over the years [ 2 , 3 , 4 , 5 , 6 , 7 , 8 ]. Two types of molten crystalline structures have been distinguished, described as α and β conformations.…”

“…The melt-crystallized crystalline morphologies are complicated. There are two limited disordered variants, α ′ and β ′, and two limited ordered variants, α ″ and β ″ [ 2 , 3 , 4 ]. An Δ crystalline phase which includes two identical cavities can be produced in the presence of solvent, and a compound between polymer and solvent is constituted in Δ form [ 5 , 6 , 7 , 8 ].…”

Polymerization of Aniline in Tubular Cavities of the Crystalline Phase of Syndiotactic Polystyrene: Proposal of a Preparation Method of Sophisticated Polymer Composites

“…SPS is known to have a complex polymorphic behavior with five crystalline phases. − In particular, two crystalline phases (δ and ε) are interesting because they have cavities inside the crystalline structure. The ε phase is an orthorhombic unit with a = 1.61 nm, b = 2.18 nm, and c = 0.79 nm containing a semicylindrical column cavity with a diameter of ∼0.65 nm surrounded by SPS chains of TTGG (2 1 -helical) conformation and its several important properties have been reported intensively. − Figure shows the chemical structure of SPS with an image of the ε crystalline phase. When quite a few units of the ε phase are successive, as shown in Figure C, the cavity could be a useful tubular space where we expect a longer functional oligomer would work as an effective composite with SPS.…”