Design, synthesis and physical properties of poly(styrene-butadiene-styrene)/poly(thiourea-azo-sulfone) blends

作者：Kausar Ayesha^*

来源：Bulletin of Materials Science, 2014, 37(4): 917-923.

DOI：10.1007/s12034-014-0026-1

• Poly(thiourea-azo-sulfone)
• SBS
• electrical conductivity
• thermal stability
• tensile strength

A new aromatic azo-polymer, poly(thiourea-azo-sulfone), has been synthesized using 1-(4-thiocarbamoylaminophenylsulfonylphenyl)thiourea and diazonium salt solution. Conducting and thermally stable rubbery blends of poly(styrene-block-butadiene-block-styrene) (SBS) triblock copolymer and poly(thiourea-azo-sulfone) (PTAS) were produced by solution blending technique. PTAS possessed fine solubility in polar solvents and high molar mass 63 x 10(3) g moL(-1). Microscopic analysis on SBS/PTAS blends revealed. good adhesion between the two polymers without macro phase separation. Electrical conductivity measurement recommended that blending of SBS with 60% PTAS was sufficiently conducting 1.43 S cm(-1). A relationship between PTAS loading and thermal stability of blends was observed. With the increasing PTAS content, 10% gravimetric loss was increased from 481 to 497 degrees C, while glass transition improved from 123 to 136 degrees C (better than neat SBS but lower than PTAS). The blends also established higher tensile strength (52.40-59-96 MPa) relative to SBS. Fine balance of properties renders new SBS/PTAS, potential engineering plastics for a number of aerospace relevance.

• 出版日期2014-6