Relationship between Localization of PBSU in Interlamellar/ Interfibrillar Regimes and Double Peaks in DSC/SAXS in its Blend with PVDF

Jia-Yao Wang; Yong-Jin Li; Ji-Chun You; Feng-Gang Bian

doi:10.1007/s10118-022-2718-0

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Relationship between Localization of PBSU in Interlamellar/ Interfibrillar Regimes and Double Peaks in DSC/SAXS in its Blend with PVDF

RESEARCH ARTICLE | Updated：2022-05-24

- Relationship between Localization of PBSU in Interlamellar/ Interfibrillar Regimes and Double Peaks in DSC/SAXS in its Blend with PVDF
- Chinese Journal of Polymer Science Vol. 40, Issue 6, Pages: 631-641(2022)
- Affiliations：
  
  a.Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
  b.University of Chinese Academy of Sciences, Beijing 100049, China
  c.Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201204, China
  d.College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou 311121, China
- Author bio：
  
  you@hznu.edu.cn (J.C.Y.)
  bianfenggang@sinap.ac.cn (F.G.B)
- Funds：
- DOI：10.1007/s10118-022-2718-0
  CLC：
- Received：31 December 2021，
  
  Revised：2022-2-14，
  
  Accepted：16 February 2022，
  
  Online First：20 April 2022，
  
  Published：01 June 2022
- Accepted：
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Wang, J. Y.; Li, Y. J.; You, J. C.; Bian, F. G. Relationship between localization of PBSU in interlamellar/interfibrillar regimes and double peaks in DSC/SAXS in its blend with PVDF. Chinese J. Polym. Sci. 2022, 40, 631–641

Jia-Yao Wang, Yong-Jin Li, Ji-Chun You, et al. Relationship between Localization of PBSU in Interlamellar/ Interfibrillar Regimes and Double Peaks in DSC/SAXS in its Blend with PVDF[J]. Chinese Journal of Polymer Science, 2022, 40(6): 631-641.
Wang, J. Y.; Li, Y. J.; You, J. C.; Bian, F. G. Relationship between localization of PBSU in interlamellar/interfibrillar regimes and double peaks in DSC/SAXS in its blend with PVDF. Chinese J. Polym. Sci. 2022, 40, 631–641 DOI： 10.1007/s10118-022-2718-0.

Jia-Yao Wang, Yong-Jin Li, Ji-Chun You, et al. Relationship between Localization of PBSU in Interlamellar/ Interfibrillar Regimes and Double Peaks in DSC/SAXS in its Blend with PVDF[J]. Chinese Journal of Polymer Science, 2022, 40(6): 631-641. DOI： 10.1007/s10118-022-2718-0.

摘要

The relationship between localization of PBSU in interlamellar/interfibrillar regions and double peaks behavior in DSC/SAXS has been clarified. Furthermore

it provides a novel strategy for detecting the interlamellar and interfibrillar segregation of low-Tm component in miscible crystalline/crystalline blend.

Abstract

In this work

phase segregation and localization of PBSU have been investigated with the combination of SAXS and DSC in its blend with PVDF. After stepwise crystallization of PVDF and PBSU

there are double melting peaks of PBSU in DSC and double scattering peaks in SAXS. It has been demonstrated that double peaks can be attributed to the localization of PBSU in interlamellar/interfibrillar region in pre-formed PVDF crystal framework. In the case of low content of PBSU in blend

PBSU is trapped into the interlamellar region of PVDF crystals

resulting in the alternating lamellae crystal of them and the first peak (with low-

) in SAXS. The enhanced confinement effect produces thinner PBSU lamellae

corresponding to the lower melting temperature in DSC. Upon increasing its content in blend

some PBSU segregates in interfibrillar regions in addition to the enrichment in interlamellar regions of PVDF crystal framework. The larger space and higher concentration of PBSU in interfibrillar-regions contribute to periodic lamellae structure of PBSU with higher thickness

which is the reason for the second peak (with high-

) in SAXS and DSC. Our results not only clarify the relationship between localization of PBSU in interlamellar/interfibrillar regions and double peaks in DSC/SAXS

but also provide a novel strategy to detect the interlamellar and interfibrillar segregation of low-

component in miscible crystalline/crystalline blend.

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references

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