Sustainable Blends of Poly(propylene carbonate) and Stereocomplex Polylactide with Enhanced Rheological Properties and Heat Resistance

Yi Li; Yan-Cun Yu; Chang-Yu Han; Xian-Hong Wang; De-Xin Huang

doi:10.1007/s10118-020-2408-8

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Sustainable Blends of Poly(propylene carbonate) and Stereocomplex Polylactide with Enhanced Rheological Properties and Heat Resistance

ARTICLE | Updated：2020-04-29

- Sustainable Blends of Poly(propylene carbonate) and Stereocomplex Polylactide with Enhanced Rheological Properties and Heat Resistance
- Chinese Journal of Polymer Science Vol. 38, Issue 11, Pages: 1267-1275(2020)
- Affiliations：
  
  a.School of Materials Science and Engineering, Jilin Jianzhu University, Changchun 130118, China
  b.Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
- Author bio：
  
  cyhan@ciac.ac.cn
- Funds：
- DOI：10.1007/s10118-020-2408-8
  CLC：
- Received：16 January 2020，
  
  Revised：2020-2-10，
  
  Accepted：19 February 2020，
  
  Online First：29 April 2020，
  
  Published：14 August 2020
- Accepted：
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Li, Y.; Yu, Y. C.; Han, C. Y.; Wang, X. H.; Huang, D. X. Sustainable blends of poly(propylene carbonate) and stereocomplex polylactide with enhanced rheological properties and heat resistance. Chinese J. Polym. Sci. 2020, 38, 1267–1275

Yi Li, Yan-Cun Yu, Chang-Yu Han, et al. Sustainable Blends of Poly(propylene carbonate) and Stereocomplex Polylactide with Enhanced Rheological Properties and Heat Resistance[J]. Chinese Journal of Polymer Science, 2020, 38(11): 1267-1275.
Li, Y.; Yu, Y. C.; Han, C. Y.; Wang, X. H.; Huang, D. X. Sustainable blends of poly(propylene carbonate) and stereocomplex polylactide with enhanced rheological properties and heat resistance. Chinese J. Polym. Sci. 2020, 38, 1267–1275 DOI： 10.1007/s10118-020-2408-8.

Yi Li, Yan-Cun Yu, Chang-Yu Han, et al. Sustainable Blends of Poly(propylene carbonate) and Stereocomplex Polylactide with Enhanced Rheological Properties and Heat Resistance[J]. Chinese Journal of Polymer Science, 2020, 38(11): 1267-1275. DOI： 10.1007/s10118-020-2408-8.

摘要

Abstract

Sustainable blends of poly(propylene carbonate) (PPC) and stereocomplex polylactide (sc-PLA) were prepared by melt blending equimolar poly(L-lactic acid) (PLLA) and poly(D-lactide acid) (PDLA) with PPC to form sc-PLA crystals

in situ

in the melt blending process. Differential scanning calorimetry analysis revealed that only sc-PLA

no homo-crystallization of PLLA or PDLA

formed in the PPC matrix as the sc-PLA content was more than 10 wt%. Very intriguingly

scanning electronic microscopy observation showed that sc-PLA was evenly dispersed in the PPC phase as spherical particles and the sizes of sc-PLA particles did not obviously increase with increasing sc-PLA content. As a consequence

the rheological properties of PPC were greatly improved by incorporation of sc-PLA. When the sc-PLA content was 20 wt%

a percolation network structure was formed

and the blends showed solid-like behavior. The sc-PLA particles could reinforce the PPC matrix

especially at a temperature above the glass transition temperature of PPC. Moreover

the Vicat softening temperature of PPC/sc-PLA blends could be increased compared with that of neat PPC.

关键词

Keywords

references

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