Foaming of Poly(3-hydroxybutyrate<italic style="font-style: italic">-co-</italic>3-hydroxyvalerate) Foams with Double Melting Peaks

Ming-Hui Wu; Dan Shi; Li Zhang; Zong-Bao Wang

doi:10.1007/s10118-025-3446-z

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Foaming of Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) Foams with Double Melting Peaks

RESEARCH ARTICLE | Updated：2025-12-03

- Foaming of Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) Foams with Double Melting Peaks
- Chinese Journal of Polymer Science Vol. 43, Issue 12, Pages: 2413-2421(2025)
- Affiliations：
  
  School of Materials Science and Chemical Engineering, Key Laboratory of Impact and Safety Engineering, Ministry of Education, Ningbo University, Ningbo 315211, China
- Author bio：
  
  wangzongbao@nbu.edu.cn
- Funds：
- DOI：10.1007/s10118-025-3446-z
  CLC：
- Received：14 July 2025，
  
  Accepted：01 September 2025，
  
  Online First：12 November 2025，
  
  Published：15 December 2025
- Accepted：
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Wu, M. H.; Shi, D.; Zhang, L.; Wang, Z. B. Foaming of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) foams with double melting peaks. Chinese J. Polym. Sci. 2025, 43, 2413–2421

Ming-Hui Wu, Dan Shi, Li Zhang, et al. Foaming of Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) Foams with Double Melting Peaks[J]. Chinese Journal of Polymer Science, 2025, 43(12): 2413-2421. DOI: 10.1007/s10118-025-3446-z.
Wu, M. H.; Shi, D.; Zhang, L.; Wang, Z. B. Foaming of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) foams with double melting peaks. Chinese J. Polym. Sci. 2025, 43, 2413–2421 DOI： 10.1007/s10118-025-3446-z.

Ming-Hui Wu, Dan Shi, Li Zhang, et al. Foaming of Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) Foams with Double Melting Peaks[J]. Chinese Journal of Polymer Science, 2025, 43(12): 2413-2421. DOI: 10.1007/s10118-025-3446-z. DOI：

摘要

Based on the characteristic that P(HB-

-HV) eutectic copolymer includes different lamellar structures

a double melting peak structure was achieved by regulating the foaming process

which significantly improved the foamability of P(HB-

-HV) and resulted in a foamed material with uniform and dense cellular structure.

Abstract

Due to environmental concerns and the oil crisis

biodegradable polymer foams have garnered increasing attention. Among all biodegradable materials

Poly(3-hydroxybutyrate

-co-

3-hydroxyvalerate) (P(HB

-co-

HV)) distinguishes itself with the advantage of being biodegradable in all natural environments. However

preparing P(HB

-co-

HV) foam with a fine cellular structure remains challenging. Herein

P(HB

-co-

HV) foams with a double melting peak structure were developed. P(HB

-co-

HV) samples were first heated briefly near the melting temperature to melt most of the crystals

followed by saturation and foaming at a lower temperature (foaming temperature). P(HB

-co-

HV) foams with cell sizes of 7.1−30.0 μm and relative densities ranging from 0.3 to 0.9 were prepared

and the foaming temperature window was as wide as 16 °C. The effect of heat treatment temperature and foaming temperature on the crystallization and cell structure was investigated through DSC and SEM. It was found that the high-melting temperature crystals generated during the saturation step significantly improved the cell structure of P(HB

-co-

HV)

since these crystals can enhance the heterogeneous cell nucleation and hinder the cell growth during foaming. The low-melting temperature crystals were formed during foaming.

In situ

WAXD analysis during heating showed that the high- and low-melting peaks c

orresponded to HV-unit-excluded and HV-unit-included PHB crystals

respectively.

关键词

Keywords

references

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⁰

Foaming of Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) Foams with Double Melting Peaks

DOI：10.1007/s10118-025-3446-z

摘要

Abstract

关键词

Keywords

references