POWDER CONSOLIDATION USING TECHNOLOGICAL COMBUSTION FOR DEVELOPMENT OF CATALYTICALLY ACTIVE MEMBRANES FOR HYDROCARBON DEHYDROGENATION

2020 ◽  
Author(s):  
V. I. Uvarov ◽  
◽  
R. D. Kapustin ◽  
A. O. Kirillov ◽  
◽  
...  
Keyword(s):  
Water Vapor ◽  
Acrylonitrile Butadiene Styrene ◽  
Powder Consolidation ◽  
Active Membranes ◽  
Catalytically Active ◽  
Styrene Acrylonitrile ◽  
Dehydrogenation Of Ethylbenzene ◽  
Butadiene Styrene

The work is devoted to the preparation of catalytically active membranes for the dehydrogenation of ethylbenzene to produce styrene which is necessary for the synthesis of numerous types of polymers, for example, polystyrene, styrene-modified polyesters, ABS (acrylonitrile-butadiene-styrene), and SAN (styrene-acrylonitrile) plastics. The global production of styrene in 2018 amounted to ~ 30 million tons, with up to 90% of styrene obtained by dehydrogenation of ethylbenzene in the presence of water vapor.

The performance and morphology of PMMA/SAN/ABS blends

2016 ◽  
Vol 36 (3) ◽  
pp. 321-327 ◽  
Author(s):  
Dan Chen ◽  
Fupeng Zhu ◽  
Tingting Zhou ◽  
Mingyao Zhang ◽  
Huixuan Zhang
Keyword(s):  
Electron Microscopy ◽  
Graft Copolymers ◽  
Cumene Hydroperoxide ◽  
Acrylonitrile Butadiene Styrene ◽  
Melt Blending ◽  
Seeded Emulsion Polymerization ◽  
Transmission Electron ◽  
Styrene Acrylonitrile ◽  
Dodecyl Mercaptan ◽  
Butadiene Styrene

Abstract Acrylonitrile-butadiene-styrene (ABS) graft copolymers were synthesized via seeded emulsion polymerization techniques by grafting styrene (St) and acrylonitrile (AN) on polybutadiene (PB) particles. Poly (methyl methacrylate) (PMMA)/styrene-acrylonitrile (SAN)/ABS blends were prepared by melt blending ABS graft copolymers with PMMA and SAN resins. The properties, morphology and grafted chains behaviors of PMMA/SAN/ABS blends were investigated. The results showed that with the increase of the ratio of PMMA/SAN, the toughness of PMMA/SAN/ABS blends slightly decreased, the transmittance first increased and then decreased, and tensile strength was not dependent on the ratio of PMMA/SAN. The evolution of impact strength of the blends was similar with the tendency of grafted degree (GD) with the increase of cumene hydroperoxide (CHP) and tert-dodecyl mercaptan (TDDM). From transmission electron microscopy (TEM), it was found that ABS graft copolymers were uniformly dispersed in PMMA/SAN matrix.

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