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A NOVEL SECOND-ORDER TRANSITION IN ORGANIC HYBRIDS CONSISTING OF POLYMERS AND SMALL MOLECULES

chinese Journal of Polymer Science 2001年第5期19卷 455-466页

作者： chi-fei wu department of chemistry and chemical engineering kanazawa university 2-40-20 kodatsuno kanazawa, ishikawa 920-8667 japan kanazawa university 日本

A novel transition appeared above thc glass transition temperature of chlorinated polyethylene (CPE) for binaryblends of CPE and additives such as organic small molecules or oligomers. This transition was assigned to the dissociation ofintermolecular hydrogen bonds between the polymer ard additive within the edditive rich phase. Of particular interest is thata novel pyramid crystal was observed in the annealed CPE/hindered phenol blends. Another intriguing observation is thatthese polymer/small molecule blends organized by intermolecular hydrogen bonding have several potential properties, suchas shape-memorization, self-restoration, self-adhesiveness and super damping.

关键词： Organic hybrid Second-order transition Shape memory effect Damping Self restoration

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Viscoelastic Properties of Organic Hybrid of Chlorinated Polythylene and Small Molecule

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材料科学与工程学报 2000年第Z1期20卷 173-180页

作者： chifei wu department of chemistry and chemical engineering Kanazawa University2-40-20 Kodatsuno Kanazawa Ishikawa 920-8667 Japan

Viscoelastic properties of an organic hybrid of chlorinated polyethylene (CPE) and N,Ndicyclohexyl-benzthiazyl-2-sulfenaamid (DZ) are investigated. All CPE/DZ hybrids show a single loss tangent (Fan δ ) peak. Its position shift linearly to higher temperature and its maximum value increases nonlinearly with increasing DZ content. The energy absorptinity (EA, a ratio of loss modulus to complex modulus) is used to characterize these hybrids. The DZ content dependence of EA changes at a critical value. The existence of a bending point in the DZ content dependence of glass transition temperature and energy absorptinity is due to the microseparation and the crystallization of DZ molecules in CPE/DZ hybrids with high DZ content. The molecular structural model can successfully explain the influence of dispersion state of DZ molecules in the matrix polymer CPE on the maximum value and the position of Tan δ of CPE/DZ hybrids.

关键词： Viscoelastic properties damping glass transition miscibility dispersion organic hybrid small molecule chlorinated polyethylene

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Surfactant-coated Candida rugosa Lipase as Catalyst for Hydrolysis of Olive Oil in Solvent-Free Two-Phase System

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chinese Journal of chemical engineering 2003年第5期11卷 601-603页

作者：宋宝东丁辉吴金川 Hayashi Y. Talukder MMR 王世昌 chemical engineering Research Center School of Chemical Engineering and Technology Tianjin University Tianjin 300072China department of chemistry & chemical engineering Faculty of Engineering Kanazawa University 2-40-20 Kodatsuno Kanazawa 920-8667 Japan chemical engineering Research Center School of Chemical Engineering and Technology Tianjin University Tianjin 300072 China

The surfactant-coated Candida rugosa lipase was used as catalyst for hydrolysis of olive oil in two-phase system consisting of olive oil and phosphate buffer without organic solvent. For both the coated and native lipases,the optimal buffer/oil volume ratio of 1.0, aqueous pH 6.8 and reaction temperature 30℃ were determined. The maximum activity of the coated lipase was ca 1.3 times than that of the native lipase. The half-life of the coated lipase in olive oil and the native lipase in phosphate buffer was ca 9 h and 12 h, and the final residual activity was 27% and 20% of their initial values, respectively. The final substrate conversion by the coated lipase was ca 20% higher than that of the native lipase.

关键词： Candida rugosa hydrolysis lipase olive oil solvent-free system surfactant

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