Open AccessCURING PROCESS OF BENZOXAZINE SYSTEMS. AN EXPERIMENTAL AND THEORETICAL STUDY
Author(s) -
Elangeni Ana Gilbert,
Agustín Forchetti,
Juan Ignacio Pesoa,
Emilio Berkenwald,
Marisa Elisabet Spontón,
Diana Alejandra Estenoz
Publication year - 2019
Publication title -
latin american applied research
Language(s) - English
Resource type - Journals
eISSN - 1851-8796
pISSN - 0327-0793
DOI - 10.52292/j.laar.2019.64
Subject(s) - curing (chemistry) , materials science , bisphenol a , fourier transform infrared spectroscopy , mass fraction , aniline , chemical engineering , composite material , polymer chemistry , epoxy , chemistry , organic chemistry , engineering
A mathematical model that simulates the curing process of benzoxazine (Bz) systems is presented. The model predicts the conversion, gel point and Tg along the curing process, and considers the diffusional limitations to mass transfer due to the increase in the system viscosity along the process. This model can be used to select an appropriate combination of time and temperature in order to obtain a material with pre-specified properties. The theoretical parameters were adjusted with experi-mental data: conversion, weight-average molecular weight, weight fraction of solubles and Tg. The Bz based on bisphenol A and aniline (BzBA) was used to adjust the model. The curing kinetic of this Bz was followed by FTIR, SEC and DSC, considering five different curing conditions. A very good agreement between experimental and simulated values was ob-served, even when curing is carried out under differ-ent temperatures profiles.