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MORPHOLOGY AND PROPERTIES OF SEGMENTED BLOCK COPOLY (ETHER ESTER)S FIBERS MADE BY GEL-DRAWING

Chinese Journal of Polymer Science 1988年第1期6卷 36-44页

作者：陈寿羲 G.wegner Institute of Chemistry Academia Sinica Beijing Max-Planck-Institute of Polymer jakob-welder-weg 15 6500-Mainz West Germany

The segmented block copoly(ether ester)s were swollen by tetrahydrofuran (THF) at 60℃and formedfibers by gel-drawing. The morphology and properties of these fibers were investigated by optical and electron microscopes, X-ray diffraction, DSC and an Instron test machine. The band structure morphology was observed in the gel-drawing fibers. The molecular chains were highly oriented as proved by X-ray diffraction data. The results indicated that the gel-drawing fibers have much better mechanical properties than those obtained otherwise. The tensile strength and elastic modulus were found to be 280 MPa and 802 MPa, repsectively. The mechanism of the gel-drawlng process was also discussed.

关键词： Morphological structure Mechanical property gel-drawing fiber segmented block copolyetherester.

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THE CRYSTALLIZATION BEHAVIOR OF URETHANE SUBSTITUTED POLYDIACETYLENE

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Chinese Journal of Polymer Science 1989年第2期7卷 174-178页

作者：陈寿羲 G. wegner Institute of Chemistry Academia SinicaBeijingChina Max-Planck-Institute of Polymer Jakob-Welder-Weg 15D-6500 MainzWest Germany

The crystalline behavior of urethane substitute polydiacetylene was studied by using pohrized light and electron microscopy. The lamellar morphological structure was observed in the crystallized films. The thickness of lamellae is about 300A, being independent of the crystalline temperature. But the size and density of lamellae were dependent on the crystallization temperature. If the molten film was sheared during the crystallzation process the oriented lamellae grew with their long axes perpendicular to the direction of shear and the chain direction was normal to the lamellar surface.

关键词： Crystallization behaviour Lamellae Electron microscopy Urethane substituted polydiacetylene.

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丙醇纤维素和顺丁烯二酸共聚物的大分子间相互交结(英文)

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光散射学报 2005年第3期17卷 275-277页

作者： G.G. Bumbu B.A. Wolf C. Vasile University of Mainz Institute of Physical Chemistry Jakob Welder Weg 13 Mainz Germany"P.Poni" Institute of Macromolecular Chemistry 41A Gr. Ghica Voda Alley Ro.700487 IASI Romania University of Mainz Institute of Physical Chemistry Jakob Welder Weg 13 Mainz Germany"P.Poni" Institute of Macromolecular Chemistry 41A Gr. Ghica Voda Alley Ro.700487 IASI Romania

Intermacromolecular associations by hydrogen bounding are of great importance both from theoretical and practical point of view. From theoretical point of view they could serve as a model for the understanding and therefore the prediction of the interactions of the biopolymers in the cells. An analysis of the interactions that appear in an IPC formed between a synthetic and a natural compound offers a better explanation of the interactions that take place at molecular level in cell as the study of the interactions between two biopolymers being very complex. In practice, they found applications especially in pharmaceutical industry for controlled (sustained and retarded) drug delivery. During the last decades considerable attention has been paid to the study of inter-macromolecular association through hydrogen bonding interactions between synthetic complementary polymers like weak polyacids and Lewis polybases. No special attentions have been paid to the studies of the intermacromolecular associations between synthetic/natural polymers containing polysaccharides, with a few exceptions as poly(acrylic acid) with methyl or hydroxyethyl cellulose. Concerning the applications, a such kind a IPC is welcome for pharmaceutical purposes due to its high biocompatibility and biodegradability (induced by the natural compound). The natural compounds mostly used for such purposes are the polysaccharides and their derivatives. Maleic acid - styrene copolymer (MAc-S) is a polyelectrolyte with a regular alternance between a strongly hydrophilic and hydrophobic groups. It derived from the hydrolysis of the maleic anhydride - styrene copolymer (MA-S). Maleic anhydride - styrene copolymer has a “per se" pharmacological activity being an inhibitor of the spermatozoids mobility (contraceptive), It is very possible that the MAc-S to preserve the pharmacological activity of MA-S. Even if the research related to application of the maleic copolymers in medicine was started in 70s, a drug cal

关键词：丙醇纤维素顺丁烯二酸共聚物大分子交结结构

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