Thermal properties and morphology results indicated that PLA and PBS were immiscible and
exhibited phase separation. On the contrary, the tensile properties of the blend showed good tensile
modulus and strength when adding PBS up to 30 wt%. Nevertheless all blends were melt-spun in a single
screw extruder at take up speeds of 50, 100 and 150 m/min. Melt-spun PLA/PBS fiber could be collected
at the take up speed less than 150 m/min. The blend fiber of PLA:PBS at 80:20 ratio could be spun but it
was discontinuous spinning. It was probably due to immiscible between PLA and PBS and the unfine
of PBS dispersed sizes. Moreover, the increaing of PBS contents in the blends made it difficult to
spinning. Therefore, PLA/PBS blends of 90:10 ratio could be spun and successfully collected at the take
upspeed of 50 m/min as shown in Fig. 5.