Physical, thermal, dielectric and chemical properties of a hyperbranched polyether and its linear analog
详细信息 查看全文
- 作者：Jyotishmoy Borah ; Sibdas Singha Mahapatra ; Diganta Saikia ; Niranjan Karak
- 关键词：Hyperbranched polyether ; Linear polyether ; Physical property ; Thermal behavior ; Chemical resistance ; Dielectric properties
- 刊名：Polymer Degradation and Stability
- 出版年：2006
- 出版时间：December 2006
- 年：2006
- 卷：91
- 期：12
- 页码：2911-2916
- 全文大小：382 K
文摘
The hyperbranched and the linear polyethers were prepared by one-pot nucleophilic displacement polymerization technique using cyanuric chloride and aromatic diol as reported earlier. The physical, thermal, dielectric and chemical properties of the hyperbranched polyether and its linear analog have been studied. The amorphous character of both the polyethers was observed in XRD study. The solubility studies showed that the hyperbranched polyether has relatively higher solubility in different solvents compared to its linear analog. The thermal properties of both polymers have been studied by thermogravimetric (TG) and differential scanning calorimetric (DSC) analyses. The chemical resistance tests indicated that both polyethers are very good chemical resistances except in dilute aqueous alkali solution. The dielectric properties such as dielectric constant and loss factor for both polyethers have also been studied with respect to changes of frequency (50–500 kHz) and temperature (303–343 K).