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Liquid crystals (LCs)/polymer composites are promising candidates for the next-generation of large-area processible and flexible electro-optical (E-O) materials due to their combination of the fast-responsive characteristics of LCs and the excellent physical properties of polymer. However, the current LCs/polymer system, represented by the polymer dispersed liquid crystals (PDLC), are suffering from...
Poly(hexamethylene succinate-co-hexamethylene fumarate)s (PHSF) with low hexamethylene fumarate content (CHF, between 0 and 18 mol%) were prepared and employed to explore the effect of intersegmental interaction in crystalline lattice on the polymorphism phenomenon. Wide angle X-ray diffraction (WAXD), differential scanning calorimetry (DSC) and Fourier transform infrared spectroscopy (FTIR) results...
Natural polysaccharide chitin nanofibers, prepared with a series of chemical and mechanical treatments, were used as an absorbent material for arsenic (As(III)) removal. The dimensions of chitin nanofibers, determined by small-angle X-ray scattering (SAXS), were about 6 nm in thickness, 24 nm in width and a few hundred nanometers in length. The chemical/mechanical treatment enabled the chitin nanofiber...
Nanofiltration (NF) membranes, consisting of a composite barrier layer prepared by interfacial polymerization of polyamide around the ultra-fine cellulose nanofibers (CN) layer in a thin-film nanofibrous composite (TFNC) scaffold, were demonstrated. Two interfacial polymerization pathways (termed IP and IP-R), regarding the arrangement of the aqueous and organic phases, were investigated. It was found...
The deformation behaviors of three types of polyethylene (PE) with different molecular weights and short chain branch contents were studied by in-situ Fourier transformation infrared microspectroscopic imaging (FTIRI) with a Focal Plane Array (FPA) detector during uniaxial tensile test. The crystal orientation distributions within a 250 × 250 μm 2 region during tensile test were obtained,...
This work investigated the effects of multi-walled carbon nanotubes (MWCNTs) on density, surface area, compressive strength, and electrical conductivity of syndiotactic polystyrene (sPS) aerogels. The non-covalently modified MWCNTs were dispersed in sPS solution before thermo-reversible gelation of the polymer. The aerogels were obtained by exchanging the solvent with liquid carbon dioxide and by...
The deformation behavior of a single spherulite embedded in quenched isotactic polypropylene (iPP) film is studied with in-situ infrared microspectroscopic imaging (FTIRI) with Focal Plane Array (FPA) detector during uniaxial tensile test. Imaging an area of 250 × 250 μm 2 with 4096 Fourier transform infrared (FTIR) spectra, the absorption distributions of crystalline (998 cm −1 band)...
Deformation-induced phase transition behavior of polyamide 12 (PA12) in its segmented copolymers with polytetrahydrofuran (PTHF) was studied with in-situ wide angle X-ray scattering (WAXS) at different temperatures. In these segmented copolymers, which contain a high content of PTHF, a transformation from the stable γ phase to a metastable α″ phase is observed during tensile deformation at room temperature,...
Drawing-induced α crystal–mesophase transition of isotactic polypropylene (iPP) was studied with in situ wide angle X-ray diffraction (WAXD) during the true stress–true strain tensile testing. The true stress–true strain and in situ WAXD measurements revealed that the critical stress for the crystal–mesophase transition has a nearly linear correlation with lamellar thickness irrespective of the sample...
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