結晶性高分子の微細構造と粘弾性吸收 : 高分子レオロジー
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概要
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Locations of absorption maxima, intensities of absorptions (or magnitudes of dispersions) and values of elastic moduli, obatined from the temperature characteristics of dynamic modulus E' and dynamic loss E'' at a constant frequency for crystalline high polymers, were interpreted in terms of their crystalline texture. The series model of crystalline (C) and amorphous (A) region corresponds to the fringed micell model adopted heretofore as the crystalline texture of crystalline polymers, since the stress applied is transferred from the crystalline to the amorphous region along the molecular chains. It can be predicted for the AC-series model that there exists only one absorption maximum between the two absorption maxima corresponding to the pure crystalline and pure amorphous regions. On the other hand, when the spherulitic texture with lamella structure, recently verified morphologically, is adopted, the AC-parallel model is to be assumed, because the lamella forms a continuous crystalline phase with a thickness of about 100 A and a portion of the stress applied is transferred along this phase from one end to the other of the specimen. With respect to the AC-parallel system, it can be predicted that, (1) there exist two characteristic absorption maxima, the α_c- and the α_a-absorption, corresponding to the crystalline and the amorphous region and their locations do not depend on the degree of crystallinity, and (2) the intensity of each absorption maximum is proportional to the volume fraction of the corresponding phase.
- 社団法人日本材料学会の論文
- 1961-05-15
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