Such a block morphology caused by cold-drawing would resemble a "chevron" morphology.
The data discussed above clearly show that cold-drawing an isotropic film induces high orientations.
Films of metallocene LLDPE with high orientations have been prepared in a two-step cold-drawing process in a pilot-scale MDO process.
The tendency for a polymer to show cold-drawing behavior was assumed to be related to the limiting strain, or the rubber elasticity component, of the polymer under the conditions of the test.
10 and 11, the cold-drawing behavior can be envisioned as follows.
Although the influence of the viscoelastic nature of the PC cannot be completely ignored, all the essential features of the true stress-strain response have been captured and should be applicable to other amorphous polymers that exhibit cold-drawing.
1) The cold-drawing behavior of polycarbonate has been explained from a material particle perspective.