屈曲性高分子を用いた高強度・高弾性率繊維およびフィルムに関する研究
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概要
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In the past 15 years, there has been increasing interest in preparing fibers with ultrahigh modulus and high strength. Many efforts have been made to produce them with special chemical and morphological features by the contro1 of two factors, molecular design and morphological design. The molecular design is associated with the average length of the chains, strength of the forces between polymer chains, the regularity with which the chains can pack together, and the stiffness of the individual chains. On the other hand, the morphological design is based on the intrinsically anisotropy of polymer molecules in physical properties such as mechanical and optical ones. This paper deals with development and deformation mechanism of high modulus and high strength materials with chain flexibility by ultradrawing in terms of the morphological design, since high-modulus and high-strength fibers have important merits in cost of products and/or energy. For example, if the fiber is improved so as to have twice the strength of ordinary fibers, we can economize by reducing the fiber volume to a half. The preparation of ultrahigh strength and modulus materials from high-molecular-weight polyethylene has been developed along several routes, and many valuable results have been obtained. Nevertheless, many unsolved questions still remain. In order to further define the indispensable conditions to produce high modulus and high strength materials by ultradrawing, this paper approaches to solve the questions for several kinds of polymers and blends.
- 1996-01-31