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Structural deformation phenomenon of synthesized poly(isosorbide-1,4-cyclohexanedicarboxylate) in hot water

Title
Structural deformation phenomenon of synthesized poly(isosorbide-1,4-cyclohexanedicarboxylate) in hot water
Author
김성훈
Issue Date
2017-01
Publisher
ROYAL SOC CHEMISTRY
Citation
RSC ADVANCES 2017, v. 7, no. 11, page. 6315-6322
Abstract
Previously syntheses of poly(isosorbide 1,4-cyclohexanedicarboxylate) (PICD) have overcome synthetic problems associated with the low-reactivity of isosorbide, using acetic anhydride to achieve in situ acetylation. However, this amorphous polymer exhibits unusual behavior when submerged in water at 100 degrees C. Severe deformation occurs, with cylindrical pellets changing into a disc-like morphology, similar to solvent-induced crystallization. The influence of water on the thermal behavior of PICD was analyzed, resulting in a mechanism analogous to solvent-induced crystallization, where the solvent functions as a plasticizer. Furthermore, the effects of acetic anhydride and open-ring isosorbide on structural deformation were investigated, revealing the occurrence of ester hydrolysis. Finally, solid state CP-MAS C-13-NMR was used to elicit the rearrangement or packing of carbons within the PICD structure.
URI
http://pubs.rsc.org/en/content/articlelanding/2017/RA/C6RA26532D#!divAbstracthttp://repository.hanyang.ac.kr/handle/20.500.11754/105841
ISSN
2046-2069
DOI
10.1039/c6ra26532d
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ORGANIC AND NANO ENGINEERING(유기나노공학과) > Articles
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