Synthesis and Properties of Melt Processed Poly(thiourea-azo-sulfone)/Carbon Nanotubes Nanocomposites

Ayesha Kausar

Citation:  Ayesha Kausar. Synthesis and Properties of Melt Processed Poly(thiourea-azo-sulfone)/Carbon Nanotubes Nanocomposites[J]. Chinese Journal of Polymer Science, 2014, 32(1): 64-72. doi: 10.1007/s10118-014-1379-z shu

Synthesis and Properties of Melt Processed Poly(thiourea-azo-sulfone)/Carbon Nanotubes Nanocomposites

摘要: An aromatic azo-polymer, poly(thiourea-azo-sulfone) (PTAS), has been prepared using 4-(4-aminophenylsulfonyl)benzenamine and diazonium salt solution of 2,6-diaminopyridine. PTAS was easily processable using polar solvents and had high molar mass 63103 gmol-1 according to GPC. Mechanically and thermally stable and electrically conducting polymer/CNTs nano-composites were obtained via melt processing technique. Fine distribution of CNTs in a polymer matrix performed an essential role in the preparation of polymer/CNTs nano-composites based on interfacial interaction between CNTs and polymer matrix. Scanning electron micrographs showed good dispersion of filler and adhesion of matrix on the surface of nanotubes. Accordingly, increasing the amount of CNTs from 0.1 wt% to 5 wt% increased the electrical conductivity from 2.99 Scm-1 to 3.56 Scm-1. Mechanical strength of functional nanotubes-based hybrids was enhanced from 43.22 MPa to 65.02 MPa compared with that of hybrids with non-functional filler in matrix 37.21 MPa. A rapport between nanotube loading and thermal stability of the materials was also observed. 10% gravimetric loss temperature was increased from 528 ℃ to 578 ℃, while glass transition was improved from 241 ℃ to 271 ℃. Adding up of small quantity of functional CNTs strongly affected the tensile, electrical and thermal properties of materials. Improvement of the physical properties of CNT-reinforced polymer nano-composites was ascribed to the melt processing technique.

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  • 发布日期:  2014-01-05
  • 收稿日期:  2013-02-15
  • 修回日期:  2013-04-19
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