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Unprecedented Thermally Induced Structural Changes in Aerogels of Poly(3-hydroxybutyrate) during Heating

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dc.contributor.author Akhila, N S
dc.contributor.author Krishnan, V G
dc.contributor.author Thomas, J P
dc.contributor.author Gowd, E B
dc.date.accessioned 2025-06-24T10:40:33Z
dc.date.available 2025-06-24T10:40:33Z
dc.date.issued 2024-06-05
dc.identifier.citation ACS Applied Polymer Materials; 6(11):6864-6874 en_US
dc.identifier.uri https://pubs.acs.org/doi/10.1021/acsapm.4c01175
dc.identifier.uri http://localhost:8080/xmlui/handle/123456789/4921
dc.description.abstract Thermally induced crystal structure changes in semicrystalline polymers involve solid-to-solid transition or melting of the starting crystal form followed by the recrystallization into different crystal forms. Understanding such crystal-to-crystal transitions by controlling the chain mobility of amorphous chains is rarely studied. Herein, we chose poly(3-hydroxybutyrate) (PHB) to investigate the temperature-induced structural changes in the bulk and aerogel samples and present the role of amorphous chain mobility on structural reorganization during heating. Aerogels of PHB were prepared by freeze-drying the thermoreversible gels and the films were prepared by hot pressing the PHB pellets. Both aerogels and films crystallized into the α form. We observed a major structural reorganization in aerogels upon heating prior to the melting and such a transition was not observed in the melt-crystallized PHB α form. We speculate that the enhanced mobility of the tie chains that are present between the α lamellar crystals during the heating of the aerogel triggered the conformational change from T2G2 helical chains to all-trans conformation (T′TT̅′T̅) within the crystal lattice resulted in the crystal-to-crystal (α to α + β) transition. en_US
dc.language.iso en en_US
dc.publisher American Chemical Society en_US
dc.subject poly(3-Hydroxybutyrate) en_US
dc.subject thermoreversible Gels en_US
dc.subject aerogels en_US
dc.subject crystallization en_US
dc.subject crystal Transitions en_US
dc.subject biodegradable Polymer en_US
dc.title Unprecedented Thermally Induced Structural Changes in Aerogels of Poly(3-hydroxybutyrate) during Heating en_US
dc.type Article en_US


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  • 2024
    Research articles authored by NIIST researchers published in 2024

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