ORIENTATION BEHAVIOR DURING UNIAXIAL STRETCHING BY WET PROCESS IN WATER FOR NYLON-6 FILMS

The relationships between the changes of stretching work or mechanical properties and the behavior of molecular orientation for uniaxially stretched Nylon-6 films prepared by wet process in water were discussed.Following results were obtained.(1) The degree of total molecular orientation can be simply expressed as a function of the logarithmic stretching work.(2) The crystal orientation is oriented higher than that of the amorphous chain with increasing stretch ratio. And, the degree of orientation for amorphous chain is unchanged during higher stretch ratio.(3) The linear relationship between the logarithmic stretching work versus Young's modulus of the stretched films is recognized.