Texture Induced by Molecular Weight Dispersity: Polymorphism within Poly(L-lactic acid) Spherulites

Da-Peng Hu; Min Chen; Yu-Hui Yang; Han-Ying Li

doi:10.1007/s10118-020-2464-0

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Texture Induced by Molecular Weight Dispersity: Polymorphism within Poly(L-lactic acid) Spherulites

ARTICLE | Updated：2020-08-17

- Texture Induced by Molecular Weight Dispersity: Polymorphism within Poly(L-lactic acid) Spherulites
- Texture Induced by Molecular Weight Dispersity: Polymorphism within Poly(L-lactic acid) Spherulites
- Chinese Journal of Polymer Science 2020年38卷第12期页码：1365-1373
- Affiliations：
  
  Ministry of Education Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
- Author bio：
  
  hanying_li@zju.edu.cn
- Funds：
  
  This work was financially supported by the National Natural Science Foundation of China (Nos. 51625304 and 51873182).
- DOI：10.1007/s10118-020-2464-0
  中图分类号：
- 收稿：2020-04-09，
  
  修回：2020-5-17，
  
  录用：2020-6-1，
  
  网络首发：2020-08-17，
  
  纸质出版：2020-09-10
- Accepted：
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Hu, D. P.; Chen, M.; Yang, Y. H.; Li, H. Y. Texture induced by molecular weight dispersity: polymorphism within poly(L-lactic acid) spherulites. Chinese J. Polym. Sci. 2020, 38, 1365–1373

Da-Peng Hu, Min Chen, Yu-Hui Yang, et al. Texture Induced by Molecular Weight Dispersity: Polymorphism within Poly(L-lactic acid) Spherulites[J]. Chinese Journal of Polymer Science, 2020, 38(12): 1365-1373.
Hu, D. P.; Chen, M.; Yang, Y. H.; Li, H. Y. Texture induced by molecular weight dispersity: polymorphism within poly(L-lactic acid) spherulites. Chinese J. Polym. Sci. 2020, 38, 1365–1373 DOI： 10.1007/s10118-020-2464-0.

Da-Peng Hu, Min Chen, Yu-Hui Yang, et al. Texture Induced by Molecular Weight Dispersity: Polymorphism within Poly(L-lactic acid) Spherulites[J]. Chinese Journal of Polymer Science, 2020, 38(12): 1365-1373. DOI： 10.1007/s10118-020-2464-0.

摘要

Abstract

Poly(L-lactic acid) (PLLA) has drawn much attention due to its excellent medical and pharmaceutical applications for decades. As a semi-crystalline polymer

morphology and crystal structure of PLLA greatly determine its properties. Here

we demonstrate

for PLLA films

a non-conventional texture featuring two types of spherulites emerging in pairs to form a distinct nested structure where a small spherulite (~10 μm) is embedded in a large one (100 μm to 300 μm). In addition to the size

the molecular weight and polymorph are different in the large and small spherulites. Crystallographic

-form and relatively low molecular weight are identified in the large spherulites

while

关键词

Keywords

references

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Spatially Resolved Cavitation within Tensile Stretched Isotactic Polybutene-1 Spherulite

Investigation of Chain Folding and Traversing during Melt Crystallization of Poly(L-lactide) Based on Selective Alkali Hydrolysis of Its Amorphous Regions

The Stereocomplex Crystallites Improve the Stability of Biodegradable Poly(L-lactic acid)/Poly(D-lactic acid) Melt-Blown Nonwovens

The Effect of NMR Setting Parameters on Molecular Weight Determination of Polyether Diols

Tunable Circularly Polarized Luminescence of Helical Poly(phenylacetylene)s via Side-chain-to-Backbone Förster Resonance Energy Transfer