二成分系共重合体の融解におよぼす結晶連鎖長とその分布の効果

抄録

The behaviors of melting in copolymers may be affected by the copolymer compositions, the crystalline sequence length and its distribution, the stereochemical relations among the repeating structural units and the conditions of crystallization, etc.. Therefore, it may be difficult to deduce explicit expressions on melting in copolymers.
In this work, the effect of crystalline sequence length and its distribution on the melting behaviors of copolymers composed of units of type A, capable of crystallizing and other units B incapable of crystallizing, is discussed in particular from a standpoint differing from that of our preceding paper.
Derived equation relating to the crystallinity against the absolute temperature for random copolymer was in accord with the relation obtained in the preceding paper. If considered the Gibbs free energy difference between the crystalline regions and the amorphous regions as a variable quantity together with the amorphous fraction and the absolute temperature, the derived equation may be valid for fair explanations of the experimental relations between the crystallinity and the absolute temperature.