화학공학소재연구정보센터
Reactive & Functional Polymers, Vol.71, No.8, 775-781, 2011
Synthesis and properties of polyamides containing high contents of thioether units
Two kinds of monomers containing the thioether units 4,4'-thiodibenzoyl chloride (T-DC) and 4,4'-bis(4-chloroformylphenylthio)benzene (BPB-DC) were synthesized in two steps and were reacted with diamine-containing thioether (-S-) and sulfone units to prepare a polyamide containing high contents of thioether groups. The intrinsic viscosities of the polyamides were 0.81-0.93 dl/g. These polymers had good optical properties, including an optical transmittance of the aromatic polyamide film at 450 nm that was higher than 90%. Additionally, the high quantity of thioether units provided the polymers with high refractive indices of 1.710-1.716 and low birefringences of 0.007-0.009. These polyamides also had excellent thermal properties, with glass transition temperatures (T-g) of 230-246 degrees C and initial degradation temperatures (T-d) of 477-473 degrees C. Finally, they showed improved solubility in polar aprotic solvents. (C) 2011 Elsevier Ltd. All rights reserved.