In Situ Generation of Ammonia: an Efficient Catalyst for the Synthesis of Phenol-Aniline-Formaldehyde Resol Resin
Journal Title: Advanced Journal of Chemistry-Section A (Theoretical, Engineering and Applied Chemistry) - Year 2020, Vol 3, Issue 2
Abstract
A novel method developed for the synthesis of resol based phenol-aniline-formaldehyde (PAF) resins by in situ generation of ammonia using magnesium hydroxide and ammonium chloride as reagents in the presence of phenol, aniline and formaldehyde. The synthesized PAF resol resins were characterized by IR, NMR spectroscopic methods, thermal stability by thermogravimetric analysis (TGA) and thermal properties by differential scanning colorimerty (DSC). Free phenol and free aniline of PAF resins were determined using gas chromatography and also these resins characterized for elemental analysis, inherent viscosity, molecular weight and gel time. DSC results illustrated that the glass transition temperatures of PAF resins exhibited in the range of 72-110 °C, whereas TGA results depicted that the thermal stability of the PAF resins revealed in the range of 516-548 °C. In situ generation of ammonia showed higher thermal stability and lower content of free phenol and free aniline in PAF resin.
Authors and Affiliations
Apparav Wale, Khudbudin Mulani, Kamini Donde, Surendra Ponrathnam, Nayaku Chavan
Keywords
Related Articles
- EP ID EP656392
- DOI 10.33945/SAMI/AJCA.2020.2.4
- Views 68
- Downloads 0
An Improved Escherichia Coli Bacterium Detection in Microchannel Based on Dielectrophoresis Impedance Measurements
In this study, a bacterial detection technique utilizing benefits of both positive and negative dielectrophoresis has been simulated with COMSOL Multiphysics. The two dimensional proposed model has six microelectrodes ac...
The Prediction of Adsorption Properties of a Solid Phase-Microextraction Fiber by Chemometrics methods
A new method for estimation of adsorption properties of a solid phase micro extraction fiber by artificial neural network (ANN) has been studied for the first time ever. An etched steel fiber which is simple prepared and...
Plasma concentration of cadmium, lead and chromium in smokers and nonsmokers in Tripoli, Libya: A comparative study
Tobacco products are known to contain some heavy metals that pose threats to smokers. In order to assess the role of smoking habits in increasing the plasma concentration of cadmium (Cd), chromium (Cr) and lead (Pb), a c...
Thermal dislocation and physical changes during preparation of active silicate of group 2 Periods 3, 4 and 5 elements from spent fines of finishing crystal glass
This study reports on the thermal dislocation and crystal growth changes during preparation of active metasilicate of group 2 periods 3.4 and 5 elements from waste fines of finishing process of crystal glass (CG) industr...
Simultaneous Determination of Amlodipine Besylate, Valsartan, and Its Related Substances in Their Film-Coated Tablets Dosage form by RP-HPLC Method
The current study aimed to develop and new, simple, accurate, economical and stability-indicating RP-HPLC for simultaneous estimation of Amlodipine Besylate, Valsartan and its related substances in their film-coated tabl...