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 |