scholarly journals Multi-phenyl structured aromatic hydrocarbon polymer

2020 ◽  
Vol 55 (2) ◽  
pp. 139-146
Author(s):  
MA Hossain ◽  
Morium ◽  
M Elias ◽  
MM Rahman ◽  
MM Rahaman ◽  
...  
Keyword(s):  
Aromatic Hydrocarbon ◽  
Polymer Electrolyte Membrane ◽  
Polymer Chains ◽  
Polymerization Reaction ◽  
Condensation Polymerization ◽  
Electrolyte Membrane ◽  
Random Polymer ◽  
Ft Ir ◽  
Ether Ketone ◽  
Hydrocarbon Polymer

Multi-phenyl structured random polymer was synthesized via condensation polymerization reaction by applying different monomer ratios and characterized by various spectroscopic methods (FT-IR, 1H NMR). The prepared polymers showed good thermooxidative stability up to 400 ºC. The surface morphology was studied by FESEM that showed the good linkage among the polymer chains. The EDS data of poly(fluorenylene ether ketone), PFEK; demonstrated that all the monomers participated in the copolymerization reaction. Inherent viscosity values of the polymers were obtained in the range of 0.76∼1.12 dL g-1. The polymers’ yield was within 85~90%. The obtained results indicate that the multi-phenyl structured polymer will be the good candidates to prepare the effective aromatic hydrocarbon polymer electrolyte membrane. Bangladesh J. Sci. Ind. Res.55(2), 139-146, 2020

scholarly journals Preparation and Characterization of Blending Sulfonated Poly(ether ether ketone) with Charged Surface Modifying Macromolecules

2017 ◽  
Vol 5 (1) ◽  
Author(s):  
M. N. A. Mohd–Norddin ◽  
A. F. Ismail ◽  
T. Matsuura ◽  
D. Rana
Keyword(s):  
Water Uptake ◽  
Mechanical Stability ◽  
Polymer Electrolyte Membrane ◽  
Blend Membrane ◽  
Electrolyte Membrane ◽  
Ether Ether Ketone ◽  
Poly Ether Ether Ketone ◽  
Ether Ketone ◽  
Speek Membrane ◽  
Sulfonated Poly

Charged surface modifying macromolecule (cSMM) end capped with sulfonic group was prepared and blended into sulfonated poly(ether ether ketone) (SPEEK). The modified membrane was characterized for polymer electrolyte membrane application; i.e. a SPEEK/cSMM blend membrane was compared to a SPEEK membrane and a Nafion 112 membrane for the thermal and mechanical stability, hydrophilicity and water uptake. Thermal and mechanical stability of the blend membrane were slightly reduced from that of the SPEEK membrane but still higher than that of the Nafion 112 membrane. The cSMM which was end–capped with sulfonic group has increased the total –SO3H group in the blend membrane. As a result, the blend membrane showed an increase in hydrophilicity and water uptake as compared to the pristine membrane. The addition of cSMM with an additional –SO3– charge has enabled the water uptake to be increased which is crucial to enhance the proton conductivity that of SPEEK. Moreover, the extra –SO3– can facilitate the transfer of proton better. This study found that cSMM is a good candidate as an additive for SPEEK in improving its function as polymer electrolyte membrane.

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