𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Curing of Diglycidyl Ether of 4,4′-Bisphenol P with Nitro Derivatives of Amine Compounds, 3

✍ Scribed by Yanxi Zhang; Sergey Vyazovkin

Publisher
John Wiley and Sons
Year
2005
Tongue
English
Weight
144 KB
Volume
206
Category
Article
ISSN
1022-1352

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Summary: Differential scanning calorimetry (DSC), thermogravimetry and isoconversional kinetic analysis were used to study the curing reaction of diglycidyl ether of 4,4′‐bisphenol P epoxy resin with an aromatic amine, 2,4‐dinitroaniline. Two exothermic peaks have been observed on a DSC curve. The first one corresponds to the cure and the second one represents decomposition. Advanced isoconversional method shows an activation energy of cure (90–115 kJ · mol^−1^) which is markedly higher than the typical activation energy of epoxy‐amine cure reaction. The effect is explained by electrostatic repulsion of the NO~2~ group that shields NH~2~ from nucleophilic attack and creates an extra energy barrier to the curing reaction.

Dependence of activation energy on the extent of conversion (scatter plot) and the dependence of the extent of conversion on temperature (line plot) at the heating rate of 10 °C · min^−1^of DGEBP/2,4‐DNA system.

imageDependence of activation energy on the extent of conversion (scatter plot) and the dependence of the extent of conversion on temperature (line plot) at the heating rate of 10 °C · min^−1^of DGEBP/2,4‐DNA system.

📜 SIMILAR VOLUMES

Curing of Diglycidyl Ether of Bisphenol
Curing of Diglycidyl Ether of Bisphenol P with Nitro Derivatives of Amine Compounds, 2
✍ Yanxi Zhang; Sergey Vyazovkin 📂 Article 📅 2005 🏛 John Wiley and Sons 🌐 English ⚖ 196 KB

## Abstract **Summary:** Differential scanning calorimetry, thermogravimetric analysis, dynamic mechanical analysis and polarized light microscopy were used to study the curing reaction of diglycidyl ether of 4, 4′‐bisphenol P epoxy resin with an aromatic amine, 3‐nitro‐1,2‐phenylenediamine. Becaus

Curing of Diglycidyl Ether of Bisphenol
Curing of Diglycidyl Ether of Bisphenol P with Nitro Derivatives of Amine Compounds, 1
✍ Yanxi Zhang; Sergey Vyazovkin 📂 Article 📅 2005 🏛 John Wiley and Sons 🌐 English ⚖ 184 KB

## Abstract **Summary:** Differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), dynamic mechanical analysis (DMA), and polarized light microscopy (PLM) were used to study the curing reaction of diglycidyl ether of 4,4′‐bisphenol P (DGEBP) epoxy resin with aromatic amine, 4‐nitro

Curing Kinetics and Thermal Stability of
Curing Kinetics and Thermal Stability of Diglycidyl Ether of Bisphenol-A Using Mixtures of Heterocyclic Derivatives of Stannanes and 4,4′-Diaminodiphenylsulfone
✍ Vikram SINGH; Gagan DEEP; Anudeep Kumar NARULA 📂 Article 📅 2008 🏛 John Wiley and Sons 🌐 English ⚖ 228 KB

## Abstract Curing kinetics of diglycidyl ether of bisphenol‐A (DGEBA) in the presence of varying molar ratios of derivatives of stannanes to 4,4′‐diaminodiphenylsulfone (DDS) was investigated by the dynamic differential scanning calorimetry. The derivatives were synthesized by reacting 1 mole of b

Microwave-Accelerated Polymerization of
Microwave-Accelerated Polymerization of 2-Phenoxymethyl-1,4,6-trioxaspiro[4,4]nonane with Diglycidyl Ether of Bisphenol A
✍ Judit Canadell; Ana Mantecón; Virginia Cádiz 📂 Article 📅 2007 🏛 John Wiley and Sons 🌐 English ⚖ 190 KB

## Abstract The cationic copolymerization of 2‐phenoxymethyl‐1,4,6‐trioxaspiro[4,4]nonane with DGEBA under microwave irradiation using ytterbium and lanthanum triflates as initiators is described. A comparison with thermal heating showed a great enhancement in the reaction rates and a higher SOE in