Structure Mediation and Properties of Poly(l-lactide)/Poly(d-lactide) Blend Fibers
AbstractPoly(l-lactic acid) (PLLA) and poly(d-lactic acid) (PDLA) blend as-spun fibers (50/50, wt.%) were prepared by melt spinning. Structure mediation under temperature and stress and properties of poly(l-lactic acid)/poly(d-lactic acid)(PLLA/PDLA) as-spun fibers were investigated by wide-angle X-ray scattering (WAXS) and differential scanning calorimetry (DSC). The results show that highly oriented stereocomplex (SC) crystals can be formed in PLLA/PDLA blend fibers drawn at 60 °C and annealed at 200 °C. However, at drawn temperature of 80 °C, only lower oriented SC crystals can be formed. For PLLA/PDLA blend fibers drawn twice at 60 °C (PLLA/PDLA-60-2), the crystallinity of SC crystals increases with annealing temperature in the range of 200 to 215 °C, while the degree of orientation decreases slightly. When the annealing temperature is 210 °C, the crystallinity and orientation of SC crystals in PLLA/PDLA-60-2 fibers reach 51% and −0.39, respectively. Moreover, PLLA/PDLA-60-2-210 fibers exhibit excellent heat-resistant property even at 200 °C. The results indicate that the oriented PLLA/PDLA blend fibers with high SC crystals content can be regulated in a short time. View Full-Text
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Yang, B.; Wang, R.; Ma, H.-L.; Li, X.; Brünig, H.; Dong, Z.; Qi, Y.; Zhang, X. Structure Mediation and Properties of Poly(l-lactide)/Poly(d-lactide) Blend Fibers. Polymers 2018, 10, 1353.
Yang B, Wang R, Ma H-L, Li X, Brünig H, Dong Z, Qi Y, Zhang X. Structure Mediation and Properties of Poly(l-lactide)/Poly(d-lactide) Blend Fibers. Polymers. 2018; 10(12):1353.Chicago/Turabian Style
Yang, Bo; Wang, Rui; Ma, Hui-Ling; Li, Xiaolu; Brünig, Harald; Dong, Zhenfeng; Qi, Yue; Zhang, Xiuqin. 2018. "Structure Mediation and Properties of Poly(l-lactide)/Poly(d-lactide) Blend Fibers." Polymers 10, no. 12: 1353.
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