A new technique to provide melt elasticity using flexible fine fibers prepared from a polymer with high melting point is demonstrated. A polymer composite of poly(propylene) with a small amount of fine fibers of poly(butylene terephthalate) shows marked strain‐hardening behavior in elongational viscosity, i.e., a rapid increase in the transient elongational viscosity with time or strain. The blend also shows prominent normal stress difference at steady shear. These elastic properties have not been observed for polymer composites with rigid fibers and can be applicable to the modification of rheological properties and thus the improvement of processability.

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We report on the monolayer formation of hydrocarbons with terminal groups of thiol, hydroxyl and alkynyl groups on H-terminated silicon using UV light in order to clarify the ability to form the well-defined monolayer. The each molecule was dissolved in the solution (100 mM) and irradiated with UV light on the Si-H substrate. The monolayer formation was investigated by water contact angle, XPS, AFM and ellipsometry. The molecules formed hydrophobic monolayer, but the densities of the monolayers were loose. The hydrocarbons with thiol and vinyl formed the most densely packed monolayer based on the photochemical reactivity with Si-H.