Citation: Hossein Mighani, Hamed Tashakkorian, Moein Mighani. Synthesis and Characterization of Soluble Polyester Based on Calixarene Dicarboxylic Acid with Tertiary Butyl Pendant Groups[J]. Chinese Journal of Polymer Science, ;2014, 32(5): 551-557. doi: 10.1007/s10118-014-1430-0 shu

Synthesis and Characterization of Soluble Polyester Based on Calixarene Dicarboxylic Acid with Tertiary Butyl Pendant Groups

Corresponding author: Hossein Mighani, h.mighani@gu.ac.ir
Received Date: 11 July 2013
Revised Date: 3 September 2013

A series of new polycalixesters (PCES) were synthesized by polyesterification of calixarene dicarboxylic acid derivatives having tertiary butyl pendant groups at the upper rim using five different diols. All polyesters were readily soluble in polar solvents such as NMP (N-methylpyrrolidone), DMF (dimethylformamide), DMSO (dimethylsulfoxide), pyridine, THF (tetrahydrofurane), HMPA (hexamethylenephosphoramide) and DMAC (dimethylacetamide). The PCES were also partially soluble in TCE (tetrachloroethane) and ethanol and they were unsoluble in aceton. The glass transition temperatures of polyesters were between 80-184 ℃, the crystallinity temperatures of polyesters were between 130-212 ℃ and the melting temperatures of polyesters were between 185-234 ℃, as determined by differential scanning calorimeter (DSC). The inherent viscosities of polyesters were obtained from 0.55 dL/mg to 0.61 dL/mg. The temperatures at 10% weight loss of polyesters ranged from 182 ℃ to 237 ℃. The temperatures at 25% weight loss of polyesters ranged from 258 ℃ to 331 ℃. The half weight loss (50%) temperatures of polyesters were among 315 ℃ to 371 ℃ and the char yields at 600 ℃ were determined within 13% to 22.3% in N2 atmosphere, as determined by thermo gravimetric analysis (TGA). The polyester, PES3, has the higher melting point (234 ℃) and higher inherent viscosity (molecular weight) than the other polyesters.
- Calixarene,
- Polyester,
- Thermal stability,
- TGA,
- DSC
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沈阳化工大学材料科学与工程学院沈阳 110142