Copolymers of poly(arylene sulfide sulfone)/poly(ether sulfone): Synthesis, structure, and rheology properties

Abstract

In order to overcome the poor flowability of poly(arylene sulfide sulfone) (PASS), we introduced ether bonds into the polymer main chain. A series poly(arylene ether sulfide sulfone) copolymers (PAESS) containing different proportion of ether bonds were synthesized with 4,4 0 -dichlorodiphenyl sulfone (DCDPS), sodium sulfide (Na 2 SÁxH 2 O), and 4,4 0 -dihydroxydiphenyl ether (DHDPE). The copolymers were characterized by Fourier transform infrared (FTIR), 1 H-nuclear magnetic resonance (NMR), differential scanning calorimetry, dynamic mechanical analysis (DMA), and rheometer. The results of FTIR and 1 H-NMR indicate the copolymers are synthesized successfully. PAESS were found to have excellent thermal properties with glass transition temperature (T g ) of 175.7-219.1 8C and 5% weight lost temperature were all above 420 8C. The tensile and DMA test indicates that these resultant copolymers have good mechanical properties with tensile strength of 60 MPa and storage modulus of 1.5 GPa. From the results of rheology properties testing, we found that the melt stability and melt flowability of PASS were improved distinctly from 25,470 Pa s down to 355 Pa s with the incorporation of ether bonds. That will be quite beneficial to the processing of PASS, especially for the thermoforming of precision products.

4‐OH‐TEMPO radical grafted onto a novel polyaromatic ether sulfone containing carboxyl side chains as solid catalyst for alcohol oxidation

“…Another band at 669 cm À1 was caused by the stretching vibration of C S bond. 38 The above characteristic peaks indicated the successful synthesis of PAES-C. For PAES-TEMPO, a weak absorption peak at 2900-2800 cm À1 appeared, which was attributed to the alkyl-stretching vibration absorption of 4-OH-TEMPO, while the hydroxyl absorption peak at 3450 cm À1 decreased. This might be explained by the esterification between the side chain carboxyl groups in the polymer and the hydroxyl group of 4-OH-TEMPO.…”

Optimization of the elastic modulus for polymeric nanocomposite membranes

“…20 As for the other dense polymers (PES and PVDF), the parameters are found using the reported thermomechanical behavior in the literature (all at a frequency of 1 Hz). 42,43 The parameters E ic are the three instantaneous stiffnesses of polymeric nano-filled composite (nonporous). E T,f , φ p is defined as the storage modulus of the membrane as a function of temperature T, frequency f (here f ¼ 1 Hz), and porosity φ p .…”

Segregated poly(arylene sulfide sulfone)/graphene nanoplatelet composites for electromagnetic interference shielding prepared by the partial dissolution method

“…[16][17][18] During the mechanical mixing process, the GNPs were adsorbed onto the surface of the PASS granules. In the subsequent hot-pressing stage, as the temperature was around the T g of PASS, 34 the movement of the molecular chains was conned so that the GNPs were prevented from penetrating into the PASS region. Instead, they were selectively distributed at the interface between the PASS phases.…”

“…In the current study, the poly(arylene sulde sulfone) (PASS)/ graphene nanoplatelet (GNP) composites were prepared by the abovementioned partial dissolution method. As a structurally modied species of poly(phenylene sulde) (PPS), PASS is a kind of special engineering polymer that can provide outstanding thermal and chemical resistance [29][30][31][32][33][34][35] for the EMI shielding CPCs. The nal PASS/GNP composites exhibited an ultralow percolation threshold, high EMI SE, elevated mechanical properties and excellent resistance to high temperature and chemicals.…”