NDLI: Phase behavior and crystal morphology in poly(ethylene succinate) biodegradably modified with tannin

Content Provider	Springer Nature Link
Author	Nurkhamidah, Siti Woo, Eamor M. Huang, I Han Su, Chean C.
Copyright Year	2011
Abstract	Specific interactions, growth kinetics, and dendritic morphology in poly(ethylene succinate) (PESu) biodegradably modified with various contents of tannic acid (TA) were characterized using differential scanning analysis, Fourier-transform infrared (FTIR) spectroscopy, polarized-light optical microscopy, and atomic force microscopy. Strong interactions and highly retarded growth between PESu and a macromolecular ester with polyphenol groups, TA, interaction-induced highly retarded growth rates for the PESu/TA (80:20) composition are proven to lead to single-crystal-like dendrites when crystallized at high crystallization temperature (T c). At T c = 70 °C, the growth rate for neat PESu is 12 μm/min while it is dramatically depressed to one tenth-fold at 1.5 μm/min with 20 wt.% TA in the blend. Strong specific interactions between the carbonyl group of polyesters and the phenolic hydroxyl group of TA are confirmed by (1) the blend’s glass transition temperature (T g)–composition relationship exhibits a sigmoidal curve, well fitted by the Kwei T g model for miscible blends with large negative q = −90; (2) thermal analysis on crystal melting revealed an interaction parameter χ = −0.64 between PESu and TA; and (3) IR peak shifting analyzed using two-dimensional FTIR technique. A comparative blend of another polyester poly(hexamethylene sebacate) with TA, lacking the specific interactions, does not exhibit such single crystals upon similar melt crystallization. Fig. 1 Using thermal and spectroscopy analyses, the strong interactions between poly(ethylene succinate) and a macromolecular ester with polyphenol groups, tannic acid, have been proven to result in miscibility with strong interactions and highly retarded growth, which together lead to AFM-revealed diamond-shaped single crystals packed in a perpendicularly grown terrace-like pattern.
Starting Page	1563
Ending Page	1578
Page Count	16
File Format	PDF
ISSN	0303402X
Journal	Colloid and Polymer Science
Volume Number	289
Issue Number	14
e-ISSN	14351536
Language	English
Publisher	Springer-Verlag
Publisher Date	2011-07-20
Publisher Place	Berlin/Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	PESu Tannic acid Morphology Single crystals Food Science Soft and Granular Matter, Complex Fluids and Microfluidics Polymer Sciences Characterization and Evaluation of Materials Physical Chemistry
Content Type	Text
Resource Type	Article
Subject	Colloid and Surface Chemistry Materials Chemistry Physical and Theoretical Chemistry Polymers and Plastics

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