Synthesis and characterization of pyromellitic dianhydride based sulfonated polyimide: Survey of structure properties with DFT and QTAIM

2021 ◽  
Vol 29 (1) ◽  
Author(s):  
Umit Yildiko ◽  
Aslihan Aycan Tanriverdi
Keyword(s):  
Pyromellitic Dianhydride ◽  
Synthesis And Characterization ◽  
Sulfonated Polyimide ◽  
Structure Properties

Synthesis and characterization of novel sulfonated polyimide with varying chemical structure for fuel cell applications

2018 ◽  
Vol 319 ◽  
pp. 141-147 ◽  
Author(s):  
Khurram Liaqat ◽  
Wajid Rehman ◽  
Shaukat Saeed ◽  
Muhammad Waseem ◽  
Srosh Fazil ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Chemical Structure ◽  
Synthesis And Characterization ◽  
Sulfonated Polyimide

Synthesis and Characterization of Highly Branched Poly(urethane-imide)s

2009 ◽  
Vol 79-82 ◽  
pp. 1575-1578
Author(s):  
Wen Qiu Chen ◽  
Chang Feng Yi ◽  
Zu Shun Xu
Keyword(s):  
Weight Loss ◽  
Acid Corrosion ◽  
Pyromellitic Dianhydride ◽  
Synthesis And Characterization ◽  
Aprotic Solvents ◽  
Dilute Acid ◽  
Chain Segment ◽  
Step Method ◽  
Aggregation Structure

A series of novel highly branched poly(urethane-imide)s (PUIs) were first successfully prep- ared by a two-step method with toluene-2,4-diisocyanate (TDI), pentaerythritol (PAT) and dianhydrides, including pyromellitic dianhydride (PMDA), 3,3′,4,4′-benzophenonetetracarboxylic dianhydride (BTDA) and 4,4'-oxydiphthalic anhydride (ODPA). It was found that the prepolymerization of PAT and TDI at 40 °C was ascertained to be 40 minutes. And the imidization of the prepolymer and PMDA was successfuly carried out after 120 °C for 2 hours. The XRD demonstrated that the obtained highly branched PUIs pre- sented semicrystalline aggregation structure which had clear crystal phase with the d-spacing around 0.39 nm. TGA curves exhibited that these highly branched PUIs had obviously two steps of weight loss attributed to the urethane chain segment and imide chain segment, respectively. The solubility testing indicated that the highly branched PUIs exhibited desirable solubility in various polar aprotic solvents, and were also resistant to dilute acid corrosion.

scholarly journals Synthesis and characterization of a novel inulin hydrogel crosslinked with pyromellitic dianhydride

2019 ◽  
Vol 134 ◽  
pp. 104-111 ◽  
Author(s):  
Franklin Afinjuomo ◽  
Thomas G. Barclay ◽  
Yunmei Song ◽  
Ankit Parikh ◽  
Nikolai Petrovsky ◽  
...  
Keyword(s):  
Pyromellitic Dianhydride ◽  
Synthesis And Characterization

scholarly journals A comprehensive study on structure, properties, synthesis and characterization of ferrites

2020 ◽  
Vol 7 (6) ◽  
pp. 800-835
Author(s):  
Ajitanshu Vedrtnam ◽  
◽  
Kishor Kalauni ◽  
Sunil Dubey ◽  
Aman Kumar ◽  
...  
Keyword(s):  
Synthesis And Characterization ◽  
Structure Properties ◽  
Comprehensive Study

Synthesis and characterization of two isomeric dithienopyrrole series and the corresponding electropolymers

2017 ◽  
Vol 8 (23) ◽  
pp. 3586-3595 ◽  
Author(s):  
Sebastian Förtsch ◽  
Peter Bäuerle
Keyword(s):  
Synthesis And Characterization ◽  
Structure Properties

Structure–properties relationships concerning monomers and electropolymers of dithieno[3,2-b:2′,3′-d]pyrroles (DTPs) and isomeric cross-conjugated dithieno[2,3-b:3′,2′-d]pyrroles (iso-DTPs) are presented.

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