Abstract

The dielectric relaxation behavior of semi crystalline poly(tetrahydrofuran) networks

Author(s): A.A.F.Zikry, M.T.El-Hefnawy, H.M.A.Ahmed, M.A.Sharaf

The dielectric relaxation behavior of hydroxyl-terminated poly tetrahydrofuran (HO-PTHF-OH) network has been investigated.The networks were prepared by a hydrolysis condensation process of the 3-isocyanato propyltriethoxysilane end capped-oligmers for the crystalline relaxation covering a range in the temperature and frequency. Also, the crystallization process of the investigated sample has been studied dielectrically as a function of time and temperature. Furthermore, the results obtained showed that (i) the optimum crystallization temperature is about 250C; (ii) the time at which crystallization starts is a function of the working temperatures and apparently is reduced to just a fewminutes at 300C; and (iii) the crystallization process is completed within a period of less than 1 hrs in the temperature range 20-300C.


Share this       

Share this Page.

Table of Contents

Flyer
izmir escort izmir escort bursa escort antalya escort izmir escort porno porno izle türk porno eskişehir escort bartın escort burdur escort izmir escort bursa escort porno indir izle escort izmir