Abstract
N,N’-Dimethylolthiourea (DMTU) resin having the methylol group ( –CH2OH ) has been prepared and characterized. The condensation of DMTU resin with m-aminophenol was carried out in the presence of alcoholic alkali catalyst at varying ratios of DMTU: mAP, namely 1:1, 1:1.5 and 1:2. The resultant DMTUmAP resin was characterized by elemental analysis, IR spectral studies, number average molecular weight (M¯n) estimated by non-aqueous conductometric titration, and thermogravimetry. The curing study of DMTUmAP resin with hexamethylenetetramine (HMTA) was monitored by differential scanning calorimetry (DSC) and kinetic parameters were evaluated. Glass-reinforced composites based on the DMTUmAP-HMTA system have also been prepared and characterized.
Highlights
The study of N,N'-Dimethylolthiourea (DMTU) resinification is well established[1,2,3,4]
The resultant DMTU - m-Aminophenol (DMTUmAP) resin was characterized by elemental analysis, IR spectral studies, number average molecular weight ( Mn ) estimated by non-aqueous conductometric titration, and thermogravimetry
Synthesis of Dimethylol thiourea (DMTU) resin These were prepared by method reported.1A mixture of thiourea (1 mole), formaldehyde (2 mole) and 2.5% alcoholic KOH was heated at 500 C with constant stirring for 75 minutes
Summary
The study of N,N'-Dimethylolthiourea (DMTU) resinification is well established[1,2,3,4]. Abstract: N,N’-Dimethylolthiourea (DMTU) resin having the methylol group ( – CH2OH ) has been prepared and characterized. The resultant DMTUmAP resin was characterized by elemental analysis, IR spectral studies, number average molecular weight ( Mn ) estimated by non-aqueous conductometric titration, and thermogravimetry.
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