Authors: M Padmanabha Raju S Alam
Publish Date: 2008/02/08
Volume: 91, Issue: 2, Pages: 401-404
Abstract
A series of silicon containing polyester imides PEIs were synthesized using novel vinyl silane diester anhydride VSEA and various aromatic and aliphatic dimines by twostep process includes ringopening polyaddition reaction to form polyamic acid and thermal cyclodehydration process to obtain polyester imides VSEA was synthesized by using dichloro methylvinylsilane and trimellitic anhydride in the presence of K2CO3 by nucleophilic substitution reaction The PEIs were characterized by FTIR spectroscopy The thermal properties of PEIs were investigated by using differential scanning calorimetry DSC and thermogravimetric analysis TG methods The prepared PEIs showed glass transition temperatures in the range of 320–350°C and their 5 mass loss was recorded in the temperature range of 500–520°C in nitrogen atmosphere These had char yield in the range of 45–55 at 800°C
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