抄録
The melting point depressions of nylon-66 and 610 films by methoxymethylation were investigated by DSC measurement. In the case of the films of both nylons annealed at 100°C, the melting peak temperatures Tm in 1st- and 2nd-runs were depressed with increasing the number of methoxymethyl substituent groups, in accordance with a modified Flory's equation for random copolymers. Therefore it is not likely to occur the continuous substitution of methoxymethyl groups for hydrogen atoms of two amide groups in a structural unit. In the case of the films annealed at 200°C for nylon-66 and 151°C for nylon-610, the decrease of Tm depression was observed, arising from the disturbance of the reorganization of crystalline regions by methoxymethyl groups in 1st-run and from the formation of blocks composed of methoxymethylated structural units in 2nd-run.
