Study on the crystallization behavior and conformation adjustment scale of poly(lactic acid) in the terahertz frequency range

Abstract

The observed properties of crystalline polymers are determined by their internal structure, which in turn is the result of their different crystallization behaviors.

Hydrogel-Assisted Microfluidic Wet Spinning of Poly(Lactic Acid) Fibers from a Green and Pro-Crystallization Spinning Dope

“…The prominent crystal plane (2 0 0)/(1 1 0) peak indicating mass crystallinity is accompanied by (2 0 3) and (1 0 3) peaks at q = 13.5 nm − 1 and q = 8.9 nm − 1 , respectively. Weak peaks of (0 1 0) and (2 1 0) diffraction (at q = 10.4 nm − 1 and 15.8 nm − 1 , respectively) indicates the existence of α'-form crystal, which is a less ordered crystal with poor thermodynamic stability [73,74]. Additional scattering signals at q = 19.1 and 22.1 nm − 1 were from residual CaCl 2 and NaCl salts used in the fiber production process.…”

Preparation and characterization of poly(butylene succinate-co-adipate)/poly(lactic acid) blends with enhanced compatibility, mechanical properties, and heat resistance

“…The peaks at 19.4°, 21.5° and 22.4° were the diffraction peaks of PBSA, indicating that the isothermal treatment and the addition of PLA had no influence on the crystalline polymorphism of PBSA. The peaks at 14.8°, 16.7° and 19.1° were diffraction peaks of PLA, corresponding to the (010), (200)/(110), and (203) lattice planes of PLA[36], and the intensity of the diffraction peaks of PLA gradually increased with the increase in PLA content.The influence of isothermal treatment on the crystallization property of PBSA/PLA/BIPB blends was investigated by DSC (Fig.S1；Table 5). With the increase in PLA content, there was a significant improvement in both the melting temperature (Tm) and crystallinity (Xc) of PLA in the PBSA/PLA blends.…”