Catalytic utilization of carbon dioxide to polymer blends via cyclic carbonate

Abstract

In the present study, the synthesis of bis(cyclic carbonate) fTom carbon dioxide and bisphenol A ( or bisphenol S )-diglycidyl ether was investigated using quaternary ammonium salts as catalyst. Among the salts tested, the one having a larger alkyl group and more nucleophflic counter anion exhibited a better catalytic activity. Poly(hydmxyurethane)s were prepared by the polyaddition reaction of bis(cyclic carbonate) and diamine. The poly(hydroxyurethane) has shown higher thermal stability than conventional polyurethane, and is expected as novel reactive polyurethane. The miscibility of blends containing poly(hydroxyurethane) and poly(styrene-co-acrylonitrileXSAN) has been also studied by the optical clarity method and DSC.

Preparation and characterization of the soluble NLO polyarylates with enhanced electro-optic properties

“…The mixture was stirred at room temperature for 2 h. After that, the acetone was removed by rotary evaporator, and the rest part was extracted by acetic ether. After dried, the cru Synthesis of the Polymers sPAR: Polycondensation was carried out in an aqueous/organic two phase system, using tetrabutyl ammonium bromide as the phase transfer catalyst [17][18][19]. Isophthaloyl dichloride (4.06 g, 20 mmol) in 50 mL of dichloroethane was added to 5.72 g (20 mmol) of diphenolicacid in 100 ml of aqueous NaOH solution (including 30 mmol NaOH) in the presence of 0.1 g of tetrabutyl ammonium bromide.…”