Melt Shear-induced <italic style="font-style: italic">γ</italic>-Phase Crystallization of Poly(vinylidene fluoride) in Miscible Crystalline/Crystalline Blends

Ze-Kai Zheng; Shuai-Fei Zhang; Long-Qing Wang; Meng-Chao Kuang; Zhen Zhang; Chong-Yang Wang; Yan-Ping Liu; Chun-Tai Liu; Zhen Wang

doi:10.1007/s10118-026-3607-8

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Melt Shear-induced γ-Phase Crystallization of Poly(vinylidene fluoride) in Miscible Crystalline/Crystalline Blends

RESEARCH ARTICLE | Updated：2026-05-30

- Melt Shear-induced γ-Phase Crystallization of Poly(vinylidene fluoride) in Miscible Crystalline/Crystalline Blends
- Chinese Journal of Polymer Science Vol. 44, Issue 6, Pages: 1926-1939(2026)
- Affiliations：
  
  a.National Engineering Research Center for Advanced Polymer Processing Technology, Key Laboratory of Materials Processing and Mold (Zhengzhou University), Ministry of Education, Zhengzhou University, Zhengzhou 450002, China
  b.National Center for International Joint Research of Micro-nano Molding Technology, School of Mechanics and Safety Engineering, Zhengzhou University, Zhengzhou 450001, China
- Author bio：
  
  ypliu@zzu.edu.cn (Y.P.L.)
  wangz@zzu.edu.cn (Z.W.)
- Funds：
- DOI：10.1007/s10118-026-3607-8
  CLC：
- Received：19 December 2025，
  
  Accepted：01 February 2026，
  
  Online First：14 May 2026，
  
  Published：05 June 2026
- Accepted：
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Zheng, Z. K.; Zhang, S. F.; Wang, L. Q.; Kuang, M. C.; Zhang, Z.; Wang, C. Y.; Liu, Y. P.; Liu, C. T.; Wang, Z. Melt shear-induced γ-phase crystallization of poly(vinylidene fluoride) in miscible crystalline/crystalline blends. Chinese J. Polym. Sci. 2026, 44, 1926–1939

Ze-Kai Zheng, Shuai-Fei Zhang, Long-Qing Wang, et al. Melt Shear-induced γ-Phase Crystallization of Poly(vinylidene fluoride) in Miscible Crystalline/Crystalline Blends[J]. Chinese Journal of Polymer Science, 2026, 44(6): 1926-1939. DOI: 10.1007/s10118-026-3607-8.
Zheng, Z. K.; Zhang, S. F.; Wang, L. Q.; Kuang, M. C.; Zhang, Z.; Wang, C. Y.; Liu, Y. P.; Liu, C. T.; Wang, Z. Melt shear-induced γ-phase crystallization of poly(vinylidene fluoride) in miscible crystalline/crystalline blends. Chinese J. Polym. Sci. 2026, 44, 1926–1939 DOI： 10.1007/s10118-026-3607-8.

Ze-Kai Zheng, Shuai-Fei Zhang, Long-Qing Wang, et al. Melt Shear-induced γ-Phase Crystallization of Poly(vinylidene fluoride) in Miscible Crystalline/Crystalline Blends[J]. Chinese Journal of Polymer Science, 2026, 44(6): 1926-1939. DOI: 10.1007/s10118-026-3607-8. DOI：

摘要

Shear flow and the addition of poly(1

4-butylene succinate) (PBSU) synergistically enhance

-phase crystallization in poly(vinylidene fluoride) (PVDF). Shear flow promotes

-phase nucleation by orienting the polymer chains

while PBSU facilitates subsequent crystal growth.

Abstract

Melt shear-induced crystallization of miscible poly(vinylidene fluoride)/poly(1

4-butylene succinate) (PVDF/PBSU) blends was investigated through a series of structural and morphological characterizations. By varying the shear rate and blend composition

we obtained two key findings regarding the

-phase generation. First

the

-phase fraction within the samples showed non-monotonic behavior

initially increasing and then decreasing with increasing shear rate (

$$ \dot{\gamma } $$

https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=109377378&type=

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)

indicating the existence of an optimal

$$ \dot{\gamma } $$

https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=109377379&type=

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value for maximizing

-phase formation. Second

adding PBSU significantly enhanced shear-induced

-phase crystallization

not only elevating the

-phase fraction at the optimal

$$ \dot{\gamma } $$

https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=109377369&type=

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but also considerably broadening the effective

$$ \dot{\gamma } $$

https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=109377390&type=

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range to achieve a high

-phase content. In contrast

PBSU did not promote

-phase formation in untreated blends. These results highlight the synergy between the shear flow and PBSU addition in facilitating the polar

-phase in PVDF. Finally

we constructed shear phase diagrams to depict the

-phase crystallization within the parameter space of the shear rate/chain orientation and blend composition. It is speculated that melt shear primarily facilitates

-phase nucleation through chain orientation

whereas PBSU enhances

-phase growth after nucleation by promoting chain diffusion and/or hydrogen bonding interactions with PVDF. This study contributes to a deeper understanding of

-phase crystallization under she

ar flow and provides a reference for regulating the polar phase of PVDF through direct melt processing.

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references

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Melt Shear-induced γ-Phase Crystallization of Poly(vinylidene fluoride) in Miscible Crystalline/Crystalline Blends

DOI：10.1007/s10118-026-3607-8

摘要

Abstract

关键词

Keywords

references