Synergistic Effect of Multi-Arm Architecture and Molecular Weight on Crystallization and Degradation Behavior of Star-Shaped Poly(lactic acid)

Nan Tian; Yi-Qing Li; Hong-Yi Gan; Zhen-Bo Ning; Ni Jiang; Zhi-Hua Gan

doi:10.1007/s10118-024-3229-y

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Synergistic Effect of Multi-Arm Architecture and Molecular Weight on Crystallization and Degradation Behavior of Star-Shaped Poly(lactic acid)

RESEARCH ARTICLE | Updated：2024-12-03

- Synergistic Effect of Multi-Arm Architecture and Molecular Weight on Crystallization and Degradation Behavior of Star-Shaped Poly(lactic acid)
- Chinese Journal of Polymer Science Vol. 42, Issue 12, Pages: 1948-1956(2024)
- Affiliations：
  
  a.State Key Laboratory of Organic-inorganic Composites, Beijing Laboratory of Biomaterials, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China
  b.Institute of Material, Sinopec Beijing Research Institute of Chemical Industry, Beijing 100013, China
- Author bio：
  
  jiangni@mail.buct.edu.cn (N.J.)
  zhgan@mail.buct.edu.cn (Z.H.G.)
- Funds：
- DOI：10.1007/s10118-024-3229-y
  CLC：
- Received：16 July 2024，
  
  Revised：2024-08-13，
  
  Accepted：02 September 2024，
  
  Online First：07 November 2024，
  
  Published：01 December 2024
- Accepted：
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Tian, N.; Li, Y. Q.; Gan, H. Y.; Ning, Z. B.; Jiang, N.; Gan, Z. H. Synergistic effect of multi-arm architecture and molecular weight on crystallization and degradation behavior of star-shaped poly(lactic acid). Chinese J. Polym. Sci. 2024, 42, 1948–1956

Nan Tian, Yi-Qing Li, Hong-Yi Gan, et al. Synergistic Effect of Multi-Arm Architecture and Molecular Weight on Crystallization and Degradation Behavior of Star-Shaped Poly(lactic acid)[J]. Chinese Journal of Polymer Science, 2024, 42(12): 1948-1956.
Tian, N.; Li, Y. Q.; Gan, H. Y.; Ning, Z. B.; Jiang, N.; Gan, Z. H. Synergistic effect of multi-arm architecture and molecular weight on crystallization and degradation behavior of star-shaped poly(lactic acid). Chinese J. Polym. Sci. 2024, 42, 1948–1956 DOI： 10.1007/s10118-024-3229-y.

Nan Tian, Yi-Qing Li, Hong-Yi Gan, et al. Synergistic Effect of Multi-Arm Architecture and Molecular Weight on Crystallization and Degradation Behavior of Star-Shaped Poly(lactic acid)[J]. Chinese Journal of Polymer Science, 2024, 42(12): 1948-1956. DOI： 10.1007/s10118-024-3229-y.

摘要

The multi-arm architecture interfered with spherulite growth

but promoted nucleation and alkaline degradation of star-shaped PLAs. With the increase of

the crystallization rate first increased and then decreased

while the alkaline degradation rate was the opposite

which was attributed to the competition between segmental mobility and central core confinement.

Abstract

Star-shaped poly(lactic acid)s (PLAs) with two to five arms were synthesized by ring opening polymerization using tin(II) 2-ethylhexanoate as catalyst and polyols as initiators. The effects of molecular weight together with multi-arm architecture on crystallization behavior

spherulite morphology and alkaline degradation behavior of star-shaped PLAs have been investigated. The results indicate that the multi-arm architecture interfered with spherulite growth

but promoted nucleation and alkaline degradation of star-shaped PLAs. Interestingly

with the increase of molecular weight (

)

the crystallization rate first increased and then decreased

while the alkaline degradation rate was the opposite. The characteristic crystallization and alkaline degradation behavior of star-shaped PLAs were discussed based on the competition between segmental mobility and central core confinement.

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references

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