Dynamic mechanical properties, low-temperature impact behavior, flexural modulus and heat distortion temperature (HDT) of isotactic polypropylene (i-PP) and propylene-ethylene block copolymer (Co-PP) toughened with st...
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Dynamic mechanical properties, low-temperature impact behavior, flexural modulus and heat distortion temperature (HDT) of isotactic polypropylene (i-PP) and propylene-ethylene block copolymer (Co-PP) toughened with styrene-ethylene butylene-styrene triblock copolymer (SEBS), at blending ratios of 0–30 phr, were studied and compared. A scanning electron microscopic morphology study of the impact-fractured surfaces demonstrated the changes in fracture mechanisms at various temperatures and SEBS contents. SEBS remarkably improves the impact endurance in the lower-temperature range when blended with Co-PP in comparison with i-PP, due to the increased compatibility in the interface between SEBS particles and the Co-PP matrix.
An experimental investigation is reported in which morphology of polyethylene terephthalate (PET) crystals obtained by solvent-induced crystallization (SINC) was studied. Although a total of 20 solvents were investiga...
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An experimental investigation is reported in which morphology of polyethylene terephthalate (PET) crystals obtained by solvent-induced crystallization (SINC) was studied. Although a total of 20 solvents were investigated, the solvents of dioxane, aniline, nitromethane, and methanol were chosen specifically for the detailed studies. The following techniques were used in the program - small-angle light scattering (SALS), optical and scanning electron microscopy, diffusion studies, and X-ray diffraction (both wide angle (WAXS), and small angle (SAXS), as well as stress-strain measurements. From this study, it has been established that the SINC of undeformed PET leads to the inducement of anisotropic spherulitic structure which develops rapidly, in comparison with the diffusion rate of the solvent through the polymer. While the rate of solvent diffusion can be enhanced by increasing the SINC temperature, the size of the resulting spherulites does not seem to be influenced significantly.
Wearable electronics offer incredible benefits in mobile healthcare monitoring,sensing,portable energy harvesting and storage,human-machine interactions,etc.,due to the evolution of rigid electronics structure to flex...
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Wearable electronics offer incredible benefits in mobile healthcare monitoring,sensing,portable energy harvesting and storage,human-machine interactions,etc.,due to the evolution of rigid electronics structure to flexible and stretchable ***,transition metal carbides and nitrides(MXenes)are highly regarded as a group of thriving two-dimensional nanomaterials and extraordinary building blocks for emerging flexible electronics platforms because of their excellent electrical conductivity,enriched surface functionalities,and large surface *** article reviews the most recent developments in MXene-enabled flexible electronics for wearable *** MXeneenabled electronic devices designed on a nanometric scale are highlighted by drawing attention to widely developed nonstructural attributes,including 3D configured devices,textile and planer substrates,bioinspired structures,and printed ***,the unique progress of these nanodevices is highlighted by representative applications in healthcare,energy,electromagnetic interference(EMI)shielding,and humanoid control of *** emerging prospects of MXene nanomaterials as a key frontier in nextgeneration wearable electronics are envisioned and the design challenges of these electronic systems are also discussed,followed by proposed solutions.
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