Crystallization behavior and phase transition of poly(R-3-hydroxydecanoate)

Ye, Hai‐Mu; Han, Li; Yang, Yuping

doi:10.1007/s00396-016-3849-z

Cited by 5 publications

(8 citation statements)

References 22 publications

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“…Overall, PHDU-6 shows consistent crystallization behavior with that of the homopolymer poly- R- 3-hydroxydecanoate (P3HD), which forms two crystalline phases ( 11 , 13 ). In these polymers, phase 1 reflects crystallization of only the alkyl side chains (lower T m ).…”

Section: Resultsmentioning

confidence: 79%

“…S61A) and q = 1.098 Å −1 (fig. S61B) further indicated crystallization of the main chains ( 11 ). The peak at q = 1.344 Å −1 (fig.…”

Section: Resultsmentioning

confidence: 94%

“…In these polymers, phase 1 reflects crystallization of only the alkyl side chains (lower T m ). Phase 2 exhibits crystallized side chains in addition to a crystallized, helical backbone (higher T m ) ( 11 ). Evidence of both phases is evident in the DSC curves shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…These behaviors align with slower crystallization and limited mobility of the rigid backbone and higher mobility/faster crystallization of the side chains. For P3HD, 54 days were required for full conversion from amorphous to phase 2 during storage at 4°C, demonstrating slow crystallization kinetics ( 11 ). Various levels of crystallinity were obtained by altering the DSC conditions.…”

Section: Resultsmentioning

confidence: 99%

“…S62B), possibly due to mixture of decanoate and undecanoate in the copolymer, and indicates a layered interplanar structure with a distance of 4.68 Å between sheets (Fig. 5D, top) ( 11 , 12 , 45 ). Neighboring parallel side chains have a distance of 4.17 Å, as evident from the peak around q = 1.505 Å −1 (fig.…”

Section: Resultsmentioning

confidence: 99%

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Elastomeric vitrimers from designer polyhydroxyalkanoates with recyclability and biodegradability

Cywar,

Ling,

Clarke

et al. 2023

Sci. Adv.

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Cross-linked elastomers are stretchable materials that typically are not recyclable or biodegradable. Medium-chain-length polyhydroxyalkanoates (mcl-PHAs) are soft and ductile, making these bio-based polymers good candidates for biodegradable elastomers. Elasticity is commonly imparted by a cross-linked network structure, and covalent adaptable networks have emerged as a solution to prepare recyclable thermosets via triggered rearrangement of dynamic covalent bonds. Here, we develop biodegradable and recyclable elastomers by chemically installing the covalent adaptable network within biologically produced mcl-PHAs. Specifically, an engineered strain of Pseudomonas putida was used to produce mcl-PHAs containing pendent terminal alkenes as chemical handles for postfunctionalization. Thiol-ene chemistry was used to incorporate boronic ester (BE) cross-links, resulting in PHA-based vitrimers. mcl-PHAs cross-linked with BE at low density (<6 mole %) affords a soft, elastomeric material that demonstrates thermal reprocessability, biodegradability, and denetworking at end of life. The mechanical properties show potential for applications including adhesives and soft, biodegradable robotics and electronics.

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Section: Resultsmentioning

confidence: 79%

“…S61A) and q = 1.098 Å −1 (fig. S61B) further indicated crystallization of the main chains ( 11 ). The peak at q = 1.344 Å −1 (fig.…”

Section: Resultsmentioning

confidence: 94%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%