Open AccessDielectric and dynamic mechanical properties of Rochelle salt / PVA composites
Author(s) -
Eman O. Taha,
G. M. Nasr
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1046/1/012008
Subject(s) - thermogravimetric analysis , materials science , dynamic mechanical analysis , composite material , thermal stability , dielectric , composite number , salt (chemistry) , glass transition , casting , thermal analysis , dielectric loss , thermal , polymer , chemical engineering , chemistry , physics , optoelectronics , meteorology , engineering
A new type of PVA composites containing Rochelle salt was prepared using the casting method. The electrical, Dynamic mechanical analysis (DMA) and thermogravimetric analysis (TGA) tests were performed on 0, 20, 30, and 50 weight% PVA based Rochelle salt to identify the effect of salt on the electrical, thermal and mechanical properties of composites. The results showed that the dielectric properties of composites were greatly improved by the addition of salt. The dielectric constant by 28.5%, 98.4% and 236.5% for composite contents 20 wt%, 30 wt% and 50 wt% Rochelle salt, respectively. The observations of dynamic mechanical analysis indicated that the adding of salt reduces both the storage modulus and affect the glass transition temperature of the composites. Moreover, the thermal stability and char yield of the PVA composites were highly affected by the Rochelle salt content.