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Effect of the thermal history on the crystallization behavior of the bacterial poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (PHBH) with various molecular weights and comonomer contents was examined. PHBH shows a lower melting temperature than poly(3-hydroxybutyrate) (PHB) homopolymer due to 3-hydroxyhexanoate component as a contaminant and crystallized very slowly when it is cooled from 200°C, which is higher than the melting temperature (Tm) of PHB. However, when PHBH is cooled from a temperature lower than the Tm of PHB, crystallization is enhanced and the crystallization temperature is increased. When this sort of thermal history is applied to the melt spinning of PHBH with a high molecular weight, the crystallization is enhanced in the spinline and as spun filament which consists of oriented crystals can be cold drawn into filament with good mechanical properties. Sorption Behavior of Natural Thermosetting Shellac Resin on Wool Fiber Takayuki Okabe*1, Kaori Sakai*2, Yoko Yoshida*2 and Kyohei Joko*2 *1Tsuyakin-kogyo Co., Ltd., 11-1, Minamikutan Konobunakashima, Ichinomiya, Aichi 494-0007, Japan *2Kyoto Women’s University, Kita-hiyoshi, Imakumano, Higashiyama-ku, Kyoto 605-8501, Japan Abstract: Sorption behavior of Shellac, which is of natural thermosetting resin, on wool fibers and enzymatic degradation of Shellac-modified wool fibers were investigated. Although immersed temperature had little effect, Shellac exhaustion depended on Shellac concentration, treatment time, the number of treated times, and also on the nature Sorption behavior of Shellac, which is of natural thermosetting resin, on wool fibers and enzymatic degradation of Shellac-modified wool fibers were investigated. Although immersed temperature had little effect, Shellac exhaustion depended on Shellac concentration, treatment time, the number of treated times, and also on the nature of solvents. Using methanol for a solvent, the amount of sorbed Shellac showed a maximum value of about 0.03g/gwool and decreased with increase of the molecular weight or size of the alcohol from methanol to t-butanol. The weight loss by enzymatic degradation for wool fibers could be controlled effectively by the sorption of Shellac. From SEM observation of surface morphology of Shellac-modified wool fiber and fracture morphology when extended to break, it was found that Shellac was sorbed selectively into the cuticle intercellular regions and affects the strength of cell adhesion. From differential scanning calorimetric curves for untreated wool fiber and wool fiber treated for different treatment time in Shellac methanol solution, it was suggested that the Shellac was sorbed within the cell membrane complex and followed by gradual penetration into the cortex cell, under the treatment conditions of the solvents with smaller molecular weight or size. Preparation and Properties of Glucose Derivatives having Polymerizable Group ICharacterization of Glucose Derivatives Prepared with Methacryl Isocyanate Compound Hideki Sugimoto*1, Eiji Nakanishi*1,Toshihisa Miura*2, Katsuhiro Inomata*1, Aiko Ogawa*2, and Shinji Hirata*2 *1Graduate school of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya, Aichi 466-8555, Japan *2Toyota Auto Body Co., LTD., 1-36-1 Kotobuki-cho, Toyota, Aichi 471-0834, Japan Abstract: In this study, glucose derivatives as novel binders for fiber board, 2-(methacryloyloxy)ethyl carbamate glucose (MOCG) was prepared by reaction of 2-(methacryloyloxy)ethyl isocyanate (MOI) and OH group of glucose. MOCGs with controlled substitution degree were also prepared by changing the molar ratio of glucose and MOI. The MOCGs were polymerized and physical properties of MOCG homopolymers were evaluated. High substituted MOCG homopolyer showed excellent mechanical property and thermal stability. On the other hand, physical properIn this study, glucose derivatives as novel binders for fiber board, 2-(methacryloyloxy)ethyl carbamate glucose (MOCG) was prepared by reaction of 2-(methacryloyloxy)ethyl isocyanate (MOI) and OH group of glucose. MOCGs with controlled substitution degree were also prepared by changing the molar ratio of glucose and MOI. The MOCGs were polymerized and physical properties of MOCG homopolymers were evaluated. High substituted MOCG homopolyer showed excellent mechanical property and thermal stability. On the other hand, physical proper520 Textile Research Journal 76(6) TRJ ties of low substituted MOCG homopolymer was lowered by the aggregation of the glucose unit. Preparation and Properties of Glucose Derivatives having Polymerizable Group IIComparison between Glucose Derivatives Prepared with Different Isocyanate Compounds Hideki Sugimoto*1, Eiji Nakanishi*1,Toshihisa Miura*2, Katsuhiro Inomata*1, Aiko Ogawa*2, and Shinji Hirata*2 *1Graduate school of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya, Aichi 466-8555, Japan *2Toyota Auto Body Co., LTD., 1-36-1 Kotobuki-cho, Toyota, Aichi 471-0834, Japan Abstract: In this study, glucose derivatives as novel binders In this study, glucose derivatives as novel binders for fiber board were prepared with isocyanate compounds, 2-hydroxyethyl methacrylate (HEMA) and glucose. 2-(methacryloyloxy)ethyl isocyanate (MOI), Tolylene 2,4-diisocyanate (TDI) and isophorone diisocyanate (IPDI) were used to prepare the glucose derivatives. When TDI and IPDI were used for preparation of glucose derivative, by-products such as glucose-diisocyanate-glucose and HEMA-diisocyanateHEMA were produced. The glucose derivatives were polymerized and physical properties of the homopolymers were evaluated. The homopolymers showed excellent mechanical property and thermal stability.

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Effect of Thermal History on the Crystallization Behavior of Bacterial Poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) and the Cold Drawability of Melt Spun Fibers