LAPSE:2023.36445
Published Article
LAPSE:2023.36445
Thermal and Crystallization Properties of a Polyhydroxyalkanoate Binary Copolymer Containing 3-Hydroxybutyrate and 3-Hydroxy-2-Methylvalerate Units
August 2, 2023
Polyhydroxyalkanoates (PHAs) are aliphatic polyesters synthesized intracellularly by microorganisms as a carbon-storage substance. Among the various PHAs, 3-hydroxybutyrate (3HB)-based copolymers are crystalline polymers widely used as biodegradable plastics. Recently, PHAs containing α-carbon-methylated monomers, such as 3-hydroxy-2-methylbutyrate (3H2MB) and 3-hydroxy-2-methylvalerate (3H2MV), have been synthesized and characterized. However, a binary copolymer of 3HB and 3H2MV, P(3HB-co-3H2MV), had not yet been synthesized, and its material properties had not been investigated. In this study, P(3HB-co-11 mol% 3H2MV) (PHBMV11) was synthesized with recombinant Escherichia coli LSBJ, using trans-2-methyl-2-pentenoic acid as the 3H2MV precursor. The thermal properties of PHBMV11 were characterized using differential scanning calorimetry (DSC), and the results were compared with those of P(3HB-co-12 mol% 3-hydroxyvalerate) (PHBV12) to explore the effect of α-carbon methylation in the comonomer unit. PHBMV11 exhibited a higher enthalpy of fusion during the DSC heating process and higher crystallization temperature during the DSC cooling process than those of PHBV12. The half-crystallization time of PHBMV11 was slightly longer than that of the P(3HB) homopolymer and much shorter than that of PHBV12 previously reported. The α-carbon methylation of the 3H2MV unit also has a positive effect on the crystallization of 3HB-based copolymers, as the 3H2MB unit demonstrated previously.
Record ID
Keywords
3-hydroxyvalerate, 3H2MV, PHA, polyhydroxyalkanoates, α-methylated monomer
Subject
Suggested Citation
Miyahara Y, Nakamura T, Mierzati M, Qie Z, Shibasaka T, Nomura CT, Taguchi S, Abe H, Tsuge T. Thermal and Crystallization Properties of a Polyhydroxyalkanoate Binary Copolymer Containing 3-Hydroxybutyrate and 3-Hydroxy-2-Methylvalerate Units. (2023). LAPSE:2023.36445
Author Affiliations
Miyahara Y: Department of Materials Science and Engineering, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8502, Japan [ORCID]
Nakamura T: Department of Materials Science and Engineering, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8502, Japan
Mierzati M: Department of Materials Science and Engineering, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8502, Japan
Qie Z: Department of Materials Science and Engineering, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8502, Japan
Shibasaka T: Department of Materials Science and Engineering, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8502, Japan
Nomura CT: Department of Biological Sciences, College of Science, University of Idaho, 875 Perimeter Dr., Moscow, ID 83844-3010, USA [ORCID]
Taguchi S: Graduate School of Science, Technology and Innovation, Kobe University, 1-1 Rokkodai-cho, Nada, Kobe 657-8501, Japan
Abe H: Bioplastic Research Team, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
Tsuge T: Department of Materials Science and Engineering, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8502, Japan [ORCID]
Nakamura T: Department of Materials Science and Engineering, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8502, Japan
Mierzati M: Department of Materials Science and Engineering, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8502, Japan
Qie Z: Department of Materials Science and Engineering, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8502, Japan
Shibasaka T: Department of Materials Science and Engineering, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8502, Japan
Nomura CT: Department of Biological Sciences, College of Science, University of Idaho, 875 Perimeter Dr., Moscow, ID 83844-3010, USA [ORCID]
Taguchi S: Graduate School of Science, Technology and Innovation, Kobe University, 1-1 Rokkodai-cho, Nada, Kobe 657-8501, Japan
Abe H: Bioplastic Research Team, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
Tsuge T: Department of Materials Science and Engineering, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8502, Japan [ORCID]
Journal Name
Processes
Volume
11
Issue
7
First Page
1901
Year
2023
Publication Date
2023-06-24
Published Version
ISSN
2227-9717
Version Comments
Original Submission
Other Meta
PII: pr11071901, Publication Type: Journal Article
Record Map
Published Article
LAPSE:2023.36445
This Record
External Link
doi:10.3390/pr11071901
Publisher Version
Download
Meta
Record Statistics
Record Views
69
Version History
[v1] (Original Submission)
Aug 2, 2023
Verified by curator on
Aug 2, 2023
This Version Number
v1
Citations
Most Recent
This Version
URL Here
https://psecommunity.org/LAPSE:2023.36445
Original Submitter
Calvin Tsay
Links to Related Works