Preparation of High Modulus Poly(Ethylene Terephthalate): Influence of Molecular Weight, Extrusion, and Drawing Parameters

Table 3

Crystallinity of as-spun PET bristles extruded at different screw rotation speeds at a take-up speed of 10 m·min⁻¹.

	Crystallinity
	@Screw rotation speed
	20 rpm	50 rpm
() @ Recrystallization peak	24.9%	24.1%
() @ Melt peak	29.4%	31.0%
()−()	4.5%	6.9%