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We studied the lamellar orientation of polyamide 6 (PA6) thin films with the thickness ranged from ∼5 μm to ∼20 nm on different solid substrates. The lamellar morphology was observed using atomic force microscopy and transmission electron microscopy, and the lamellar orientation was characterized using two-dimensional (2D) grazing incidence wide-angle X-ray diffraction (GI-WAXD) and selected area...
Fe 3 O 4 /carbon composite nanofibers were prepared by electrospinning polyacrylonitrile (PAN), iron (III) acetylacetonate (AAI) and dimethyl formamide (DMF) compound solutions, followed by stabilization and carbonization processes. Emphasis was put on the influence of AAI on reactions during stabilization and carbonization. The effect of Fe 3 O 4 on catalytic graphitization...
The effects of the aspect ratio of multi-walled carbon nanotubes (MWNTs) on the rheology and flammability of polystyrene/MWNT nanocomposites are studied using two MWNTs having average aspect ratios (length to outer diameter) of 49 and 150. Dynamic rheological experiments show that the particles with the larger aspect ratio impart much higher storage moduli and complex viscosities to the nanocomposites...
The interfacial thickness between immiscible polymers, bisphenol A polycarbonate (PC) and styrene–acrylonitrile random copolymers (SAN), was measured by ellipsometry as a function of temperature and acrylonitrile content in SAN, in order to study the miscibility between PC and SAN. Both the temperature and copolymer composition (AN content) dependence of the interfacial thickness in the equilibrium...
Physical characterization of a commercial polyolefinic thermoplastic elastomer (TPE), Santoprene(R), was undertaken to understand the elastomeric nature of the two-phase material in which rubber particles are dispersed in a matrix of polypropylene (PP). Dynamic mechanical analysis showed that the PP matrix contains a small amount of rubber. PP crystal lamellae in rubber particles in a well-annealed...
A thermoset/thermoplastic system, diallyl phthalate (DAP)/poly(2,6-dimethyl-1,4-phenylene ether) (PPE), was found to show upper critical solution temperature (UCST)-type phase behaviour (UCST 145°C). The system was cured by organic peroxide just above the UCST. The morphology development during curing was studied by time-resolved light scattering, Fourier transform infrared spectroscopy (FTi.r...
A hydrogenated poly(styrene-co-butadiene) (hSBR) was found to be miscible with isotactic polypropylene (iPP) above the melting point of iPP. The mixture was phase-separated at lower temperatures, i.e. the iPP/hSBR blend exhibited upper critical solution temperature (UCST) type phase behaviour (UCST 100°C). The UCST phase behaviour was determined by time-resolved light scattering analysis. in...
Reactive blending of polypropylene (PP) and amorphous polyamide (aPA) was carried out using a gram-scale mixer. Maleic anhydride-grafted PP was used as a reactive PP. Time-resolved light scattering analysis showed that, compared with non-reactive systems, the reactive one yielded finer particles of sub-μm, via a faster size-reduction process, and exhibited better stability of dispersed particles for...
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