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Citation: Luo Chunyan, Zhang Pan, Yan Bo, Yang Minrui, Li Shoujia, Tang Feng, Fu Yuqiao, Chen Weixing. Crystallization Behavior of Poly(L-lactic acid)/Poly(D, L-lactic acid) Blends[J]. Chemistry, ;2019, 82(6): 549-554. shu

Crystallization Behavior of Poly(L-lactic acid)/Poly(D, L-lactic acid) Blends

School of Materials and Chemical Engineering, Xi'an Technological University, Xi'an 710021

Received Date: 31 December 2018
Accepted Date: 16 February 2019

Figures(12)

The existence of amorphous ploy(D, L-Lactic acid) (PDLLA) will influence the crystallization behavior of Ploy(L-Lactic acid) (PLLA). In this work, the differential scanning calorimeter (DSC) and polarizing optical microscope (POM) were used to investigate the crystallization behavior of PLLA/PDLLA blends with different molecular weights and compositions. When the molecular weight of PDLLA is small, the spherulite characteristics of PLLA are obviously destroyed. When the molecular weight of blending PDLLA is large, PLLA is more likely to maintain the spherulitic characteristics, and it is easy to form a ring-shaped spherulitic morphology. It is depending on the degree of matching between the crystallization rate and the diffusion rate of the amorphous component. The maximum growth rate appears at lower temperature while blending with PDLLA that have smaller molecular weight.
- Ploy(L-Lactic acid) (PLLA),
- Ploy(D, L-Lactic acid)(PDLLA),
- Blends,
- Crystallization behavior,
- Ring-banded spherulites
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