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Main Title: Geomimetics for green polymer synthesis: highly ordered polyimides via hydrothermal techniques
Author(s): Baumgartner, Bettina
Bojdys, Michael J.
Unterlass, Miriam M.
Type: Article
Language Code: en
Abstract: Inspired by geological ore formation processes, we apply one-step hydrothermal (HT) polymerization to the toughest existing high-performance polymer, poly(p-phenyl pyromellitimide) (PPPI). We obtain highly-ordered and fully imidized PPPI as crystalline flakes and flowers on the micrometer scale. In contrast to classical 2-step procedures that require long reaction times and toxic solvents and catalysts, HT polymerization allows for full conversion in only 1 h at 200 °C, in nothing but hot water. Investigation of the crystal growth mechanismviascanning electron microscopy (SEM) suggests that PPPI aggregates formviaa dissolution–polymerization–crystallization process, which is uniquely facilitated by the reaction conditions in the HT regime. A conventionally prefabricated polyimide did not recrystallize hydrothermally, indicating that the HT polymerization and crystallization occur simultaneously. The obtained material shows excellent crystallinity and remarkable thermal stability (600 °C under N2) that stem from a combination of a strong, covalent polymer backbone and interchain hydrogen bonding.
Issue Date: 2014
Date Available: 23-Jun-2016
DDC Class: 540 Chemie und zugeordnete Wissenschaften
Journal Title: Polymer chemistry
Publisher: Royal Society of Chemistry
Publisher Place: Cambridge
Volume: 5
Issue: 12
Publisher DOI: 10.1039/c4py00263f
Page Start: 3771
Page End: 3776
EISSN: 1759-9954
Notes: Dieser Beitrag ist mit Zustimmung des Rechteinhabers aufgrund einer (DFG geförderten) Allianz- bzw. Nationallizenz frei zugänglich.
This publication is with permission of the rights owner freely accessible due to an Alliance licence and a national licence (funded by the DFG, German Research Foundation) respectively.
Appears in Collections:FG Funktionsmaterialien » Publications

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