Confined growth of poly (butylene succinate) in its miscible blends with poly (vinylidene fluoride): morphology and growth kinetics
Abstract
The morphology and confined crystallization behavior of poly(butylene succinate) (PBS) in miscible poly(vinylidene fluoride) (PVDF)/PBS blends has been studied using differential scanning calorimetry (DSC) and optical and atomic force microscopy (OM and AFM). It was found that PBS crystal lamellae nucleated and grew confined inside the matrix of PVDF spherulites. Crystallized PBS domains grow with an ellipsoidal outline within PVDF spherulites formed at a relatively high PVDF crystallization temperature (T(c,PVDF)), while circular domains, engulfing several PVDF spherulites, are seen when growing in the PVDF spherulites created at lower T(c,PVDF). The growth kinetics of PBS confined in the PVDF matrix was investigated under various conditions. The growth rate of PBS (G(PBS)) increases with decreasing crystallization temperature and increasing PBS content under a given PVDF crystallization temperature (T(c,VDF)). For T(c,PVDF) above 145 °C, G(PBS) decreases with T(c,PVDF) for both 50:50 and 30:70 PVDF/PBS blends. However, for T(c,PVDF) below 145 °C, 50:50 and 30:70 PVDF/PBS blends exhibit the opposite G(PBS) trend; that is, G(PBS) for the 50:50 blend decreases with decreasing T(c,PVDF), while for the 30:70 PVDF/PBS blend G(PBS) increases with decreasing T(c,PVDF). It is shown that this behavior cannot be associated with the effect of crossing the boundary of smaller PVDF spherulites formed at a lower temperature. Rather, the behavior appears to be related to the interleaving growth of PBS lamellae among PVDF lamellae or between bundles of PVDF lamellae (fibrils), as in situ AFM observation shows. It is found that the interconnectedness of the molten pockets within the PVDF spherulites, which depends on the PVDF crystallization temperature, is an important factor determining the growth kinetics of PBS confined within the PVDF scaffold.
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In PBS/PVDF blends, PBS crystallization within PVDF interfibrillar/interlamellar regions was directly visualized under PLOM.
“PBS crystallization within PVDF interfibrillar/interlamellar regions was directly visualized under PLOM.”
From Fractionated crystallization in semicrystalline polymers (2021) · cites this paper as [82]
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- Authors
- Wang, T., Li, H., Wang, F., Yan, S., & Schultz, J. M.
- Affiliations
- Chinese Academy of Sciences (CN)
- State Key Laboratory of Chemical Resource Engineering (CN)
- University of Delaware (US)
- Corresponding author
- Yan, Shouke
- Schultz, Jerold M.
- Venue
- The Journal of Physical Chemistry B
- Publisher
- American Chemical Society (ACS)
- Published
- 2011-06-01
- Volume
- 115
- Issue
- 24
- Pages
- 7814-7822
- ISSN
- 1520-5207 (ISSN-L)
- 1520-6106
- OpenAlex
- W2319991994
- Cited by
- 63
- References
- 25
- Citations by year
- 2026: 2 · 2025: 1 · 2024: 1 · 2022: 6 · 2021: 2 · 2020: 2 · 2019: 2 · 2018: 3 · 2017: 7 · 2016: 6 · 2015: 12 · 2014: 9 · 2013: 2 · 2012: 8
- FWCI
- 5.19
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- The Journal of Physical Chemistry B (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Physical Sciences › Materials Science › Polymers and Plastics › Polymer crystallization and properties
- Physical Sciences › Materials Science › Biomaterials › biodegradable polymer synthesis and properties
- Physical Sciences › Materials Science › Materials Chemistry › Solidification and crystal growth phenomena
- Keywords
- poly(butylene succinate), polyvinylidene fluoride, miscible polymer blends, confined crystallization, spherulites, crystal morphology, melt pockets, biodegradable polymers
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