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Copolyesters of Lactide, Isosorbide, and Terephthalic Acid‐Biobased, Biodegradable, High‐ T g Engineering Plastics
Author(s) -
Kricheldorf Hans R.,
Weidner Steffen M.
Publication year - 2013
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201200612
Subject(s) - terephthalic acid , lactide , condensation polymer , molar mass , copolyester , polymer chemistry , isosorbide , glass transition , materials science , chemistry , polymer , polyester , organic chemistry , polymerization
Various copolyesters of lactide, isosorbide, and terephthalic acid are prepared by a two‐step process performed in a “one‐pot” procedure, beginning with an isosorbide‐initiated oligomerization of L ‐lactide followed by polycondensation with terephthaloyl chloride using SnCl 2 as a catalyst for both steps. The SEC data show the formation of random copolyesters with high polydispersities as a consequence of the relatively high fraction of cyclics proved by matrix‐assisted laser desorption ionization time‐of‐flight mass spectrometry (MALDI‐TOF MS). The glass‐transition temperatures (89–180 °C) obey an almost linear trend with the molar composition. The thermostability decreases with increasing lactide content. The successful incorporation of phenyl phosphate results in copolyesters of lower inflammability.