Hand characteristics of New Synthetic Fiber Fabrics have something to do with mechanical properties of fabric. But the maximum tensile load according to various kinds of fabrics must be oaken into consideration by use of KES-FB system. which measures hailed characteristics and mechanical properties of fabric. This paper surveys tensile deformation region which has an effect on the hand of polyester fabric as basic study on hand characteristic of Uew Synthetic Fiber Fabrics. And relationship between tensile characteristics of polyester fabric and structural parameters of yarn and fabric is analyzed. So this study carries on the relationship between the mechanical properties of polyester fabric and fabric structural parameters such as fineness, twist level. fabric density and weave structure. The other objectives in this work are to investigate the effects of the region of the tensile deformation according to the weave structure related to an effect of the fabric structural parameters on the tensile properties of polyester fabric as a basic study on the hand characteristics of New Synthetic Fiber Fabrics.

The spreading behavior of poly (styrene-co-maleic anhydride)/arachidic acid mixed monolayers at the air-water interface was studied for determining the optimum preparation conditions of the Langmuir-Blod-gelt(LB) films. The stable mixed monolayers were able to be transferred successively onto solid substrates. The surface wettability of the built-up alms showed alternately the hydrophilic and hydrophobic property. Depending on even and odd number of layers. The structure of the mixed LB films was investigated by the X-ray diffraction measurements; the diffraction intensity decreased by the increase of poly(styrene-co-maleic anhydride) content, but the diffraction angles were not changed. The X-ray diffraction results also indicated that the mixed LB films have well-ordered layer structure.

Composite membranes were prepared by the depoistion of plasmerized coatings onto porous polycarbonates. The monmer chosen for plasma poltmerization was hexafluorobenzene(HFB) which is among flurine compounds well known with good affinity to oxygen. The chemcial structure, surface free engergy and thermal characteristics of pasma-polmerized membence ralated to gas separation properties were investigated in terms of power(W) and feed-in rate of moner(Fm). It was found the structure and charcteristics above-mentioned were affected by discharge power and feed-in rate of monomer. The CF2,CF3 bonds in PP-HFB indicated that the plasma polymerization of HFB was undergone via the repetition of monmer fragmentation and polymeriztion. Also ti was found that PP-HFB had hige hydrophobicity. The oxgen and nitrogen permeation rate(RO2, and RN2)and the selectivity value(RO2/RN2)for the composite membrabes depended on the condition of plasma poltmeriztion and the thickness of the composite membranes depended on the condition of plasma polmerization and the thickness of the PP-HGB. These composite membaranes showed the high owygen permeation rate(RO2=10-5cm3(STP)/cm2seccmhg) and selectivity(RO2/RN2=4) respectively. Tetramethylsilan(TMS) was used to improve the adhesiveness between PC membrance and PP-HFB. As a result, improve the adhesiveness could be improved without decreasing the permsalectivity.

Cotton fabrics were treated with THPC-urea precondensate by pad-dry-ammonia curing. Flammability of treated cotton fabrics and physical properties such as tensile strength and tearing strength, and the optimum treatment conditions imparting maximum durable flame retartlancy were investigated. The fabrics treated by this technique had excellent durable flame resistance. The fabrics showed no change in tensile strength and a little reduction in tearing strength in comparison with the untreated fabric. The fabrics treated with more than 50% solution of THPC-urea precondensate could pass DOC FF 3-71 vertical flame lest after 50 laundry cycles.

1 Mole of poly(propylene glycol) (PP6) with molecular weight of 2000 was reacted with 2 moles of hexamethylene diisocyanate (HDI) at 12$0^{\circ}C$ for 15 hours under nitrogen atmosphere to give HDI-PPG-HDI intermediate. Then s-caprolactam (CL) was added to the system to block the end NCO groups. The resultant prepolymer has the form of H-carbamoyl caprolactam and can be used as an activator with NaH catalyst for the anionic ring opening polymerization of CL. Using this method. PCL-b-PPG-b-PCL triblock copolymers with various content of PPG up to 40 wt% were obtained. Homo poly(s-caprolactam) (PCL) was also polymerized using newly synthesized CL-blocked HDI activator (hexamethylene dicarbamoyl dicaprolactam). The yields of the polymerizations were determined by gravimetry after successive soxhlet extraction with water and acetone. Homo PCL has the yield of about 94% The yields of triblock copolymers were (lecreased with increasing PPG content antral the copolymer with 40 wt% PPG feed content has the yield of about 80%. According to the results of copolymer composition. determined by 1 H-NMR spectroscopy. it has been revealed that the PPG content in the block copolymer is greater than the prepolymer composition in the feed when the prepolymer composition is less than 30 wt%. On the contrary when the prepolymer composition in the feed is over 30 wt%. the PPG content is lower than the feed composition.

Ethylene-propylene random copolymer(EPH) toughened isotactic polypropylene(PP) alloy systems were melt blended using twin-screw extruder. Mechanical properties such as tensile and impact strength were measured using tensile tester and Izod impact tester, respectively. EPM rubber particle size. shape and distribution were observed from liquid nitrogen fractured and etched surface using scanning electron microscope(SEM). Also, corresponding microstructural deformation was analysed using SEM and optical microscope. Tensile test results revealed that yield strength and modulus were decreased with increasing EPM rubber content. However. yield strain was increased with increasing EPM rubber content. Izod impact strength was increased with increasing EPH rubber content at room temperature, however. remained almost unchanged at low temperature(-4$0^{\circ}C$). Liquid nitrogen fractured surface showed that EPM rubber size and distribution were decreased with increasing EPM rubber content.

Microstructural deformation behavior of polystyrene(PS) /polyphenylene oxide(PPO) and PS/polyvinylmethylether(PVME) was analyzed using transmission electron microscope(TEM) and microdensitometer. Individual craze and shear deformation microstructures were observed and quantitatively analyzed in terms of its characteristic fibril extension ratio(L) using microdensitometry. Microdensitometry results showed that L values decreased as the PPO and PWE content increased. These behavior can be qualitatively explained using the concept of chain entanglement in PS/PPO blends. However, in PS/PVME blends, these L behavior can be explained using the intermolecular interaction induced relaxation behavior of PVME chains.