NDLI: From miscible to partially miscible biodegradable double crystalline poly(ethylene succinate)-b-poly(butylene succinate) multiblock copolymers

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Polymer Chemistry Vol -2

Polymer Chemistry Vol -1

From miscible to partially miscible biodegradable double crystalline poly(ethylene succinate)-b-poly(butylene succinate) multiblock copolymers

Content Provider	Royal Society of Chemistry (RSC)
Author	Zhu, Qun-Ying Lu, Xi Zeng, Jian-Bing He, Yi-Song Wang, Yu-Zhong
Copyright Year	2012
Abstract	A series of biodegradable double crystalline poly(ethylene succinate)-b-poly(butylene succinate) (PES-b-PBS) multiblock copolymers with various PES and PBS block lengths were successfully synthesized by chain-extension reaction of dihydroxylated poly(ethylene succinate) (HO-PES-OH) and poly(butylene succinate) (HO-PBS-OH) using 1,6-hexamethylene diisocyanate (HDI) as a chain-extender. The compositions and structures were characterized by proton nuclear magnetic resonance spectroscopy (1H NMR). The miscibility of amorphous phase and crystallization behaviors of the two blocks were investigated by standard differential scanning calorimetry (DSC), temperature modulated DSC (TMDSC), polarized light optical microscopy (POM), and wide-angle X-ray diffraction (WAXD). When the block length of PBS and PES were less than 4710 g mol−1, the amorphous phases of the two blocks were miscible. As the block length increased to more than 5430 g mol−1, the amorphous phases of the two blocks changed to be partially miscible, and the miscibility decreased with further increasing the block lengths. The crystallizability of both PBS and PES blocks increased with an increase in size of their blocks. POM observation showed that the copolymers displayed banded spherulitic morphologies, and the crystallization of PES happened in confined space after crystallization of PBS blocks. WAXD analysis suggested that the crystals of the copolymers were composed of crystals of both PES and PBS blocks.
Starting Page	399
Ending Page	408
Page Count	10
File Format	HTM / HTML PDF
ISSN	17599954
Volume Number	3
Issue Number	2
Journal	Polymer Chemistry
DOI	10.1039/c1py00456e
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	PBS Biodegradation Differential scanning calorimetry Hexamethylene diisocyanate Optical microscope Ethylene Nuclear magnetic resonance spectroscopy Proton nuclear magnetic resonance X-ray crystallography DSC Succinic acid Miscibility Nuclear magnetic resonance Butene
Content Type	Text
Resource Type	Article
Subject	Organic Chemistry Biochemistry Bioengineering Biomedical Engineering Polymers and Plastics

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