Synthesis,characterization of β-CD based novel hydrogels with dual objectives of drug release and dye removal

Iranian Polymer Journal - In our recent work, we have reported on hydrogels devoid of cross-linkers. After observing the successful swelling and water retention properties, we have introduced...     

Synthesis of hydrazine-fumaryl chloride-based polyamide and its electrical conductivity studies

Perfect crisscross chain arrangements with high inter-chain H-bonding structure of conjugated polyamides are capable of inter-chain proton transfer and this property of conjugated polyamides makes them semiconducting material. To establish this, we synthesized in situ HCl doped Hydrazine-Fumaryl Polyamide (HFP) material via the condensation polymerization method. HFP was further modified by doping with Lewis acids BF₃ and AlCl₃ to increase the amorphous nature and ionic conductivity. Among the synthesized material, HFP–AlCl₃ showed the highest amorphous property with the best bulk conductivity in the order of 10⁻⁵ S/cm at room temperature. HFP and doped HFP showed correlated hopping type (n < 1) ionic dynamics in the polymer matrix. There was a high amount of charge associated with the polymer matrix (>10⁶ F/m) with negligible electrode-electrolyte effect contribution. These properties of materials can make them useful in the field of organic voltaic and fuel cell applications.     

Preparation of ultra‐high‐molecular‐weight polyacrylamide by vertical solution polymerization technique

A straightforward and novel methodology has been developed for the synthesis of ultra‐high‐molecular weight polyacrylamide (PAM) by vertical solution polymerization technique. By varying the concentrations of acrylamide monomer, three different grades of polymers (PAM‐V₁, PAM‐V₂, and PAM‐V₃) have been synthesized and compared with the series of different grades of PAM (PAM‐C₁, PAM‐C₂, and PAM‐C₃) synthesized through conventional solution polymerization technique. The synthesized grades PAM‐V₁, PAM‐V₂, PAM‐V₃, PAM‐C₁, PAM‐C₂, and PAM‐C₃ have been characterized by ¹H NMR, infrared spectroscopy, intrinsic viscosity measurement, molecular weight determination by gel permeation chromatography, and thermal analysis. Rheological analysis has been carried out on the aqueous solutions of various grades of PAMs. Swelling behavior of ultra‐high‐molecular weight PAMs has also been investigated. The flocculation performances of all grades have been investigated in kaolin suspension by settling and jar test methods. POLYM. ENG. SCI., 59:1175–1181 2019. © 2019 Society of Plastics Engineers