Synthesis and Characterization of Copoly(Ether Sulfone)s with Different Percentages of Diphenolic Acid Units

New functionalized Poly(ether sulfone)s having different molar ratio (10, 20, 30, 50, 70, 100 mol%) of 4,4-bis phenoxy pentanoic acid unit (diphenolic acid; DPA) units were synthesized and characterized by ( H and C)-NMR, MALDI-TOF MS, FT-IR, DSC and DMA analyses. The microstructural analysis of the...

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Bibliographic Details
Published in:Polymers 2020-08, Vol.12 (8), p.1817
Main Authors: Scamporrino, Andrea A, Puglisi, Concetto, Spina, Angela, Montaudo, Maurizio, Zampino, Daniela C, Cicala, Gianluca, Ognibene, Giulia, Mauro, Chiara Di, Dattilo, Sandro, Mirabella, Emanuele F, Recca, Giuseppe, Samperi, Filippo
Format: Article
Language:English
Subjects:
Acids
Chains (polymeric)
Chlorine
Contact angle
Copolymers
Cyclic oligomers
Microstructural analysis
NMR
Nuclear magnetic resonance
Oligomers
Physical properties
Polymer blends
Polymers
Statistical models
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Summary:New functionalized Poly(ether sulfone)s having different molar ratio (10, 20, 30, 50, 70, 100 mol%) of 4,4-bis phenoxy pentanoic acid unit (diphenolic acid; DPA) units were synthesized and characterized by ( H and C)-NMR, MALDI-TOF MS, FT-IR, DSC and DMA analyses. The microstructural analysis of the copolymers, obtained by C-NMR using an appropriate statistical model, shows a random distribution of copolymer sequences, as expected. The presence of different amount of DPA units along the polymer chains affects the chemical and physical properties of the copolymers. The Tg and the contact angle values decrease as the molar fraction of DPA units increases, whereas the hydrophilicity increases. NMR and MALDI-TOF MS analyses show that all polymer chains are almost terminated with hydroxyl and chlorine as end groups. The presence of cyclic oligomers was also observed by MALDI-TOF MS analysis.
ISSN:2073-4360
2073-4360
DOI:10.3390/polym12081817