TITLE:
Crystallization Kinetics of Melt-Blended Low-Density Phthalic Anhydride with a Low-Tg Tin-Phosphate
AUTHORS:
Laila M. Al-Harbi
KEYWORDS:
Polyamides Crystallinity, Phosphate Glass-Polymer Hybrids, DSC and Kinetics
JOURNAL NAME:
Open Journal of Polymer Chemistry,
Vol.4 No.3,
August
6,
2014
ABSTRACT:
Polyamide prepared by the reaction of ethylene diamine with different
ratios between 1,6-glyconic acid and phthalic anhydride. The differential
scanning calorimetry (DSC) is used to study the nonisothermal and isothermal
crystallization of low density polyamides in phosphate glass (Pglass)-polymer
hybrid blends. The % crystallinity decreased as the Pglass volume increased.
The half-life (t1/2) for crystallization decreased as the
propagation rate constant rose for both the polymer matrices with increasing
Pglass concentrations. The results show that the Pglass is improved nucleating
agent for formation of the Pglass-polymer hybrids up to 35% Pglass and the
energy necessary to break decreased. The stability of the reaction of ethylene diamine
with phthalic anhydride and glyconic acid was qualitatively investigated using
molecular orbital calculations.