Degradation of Poly(3-(Oxiran-2-ylmethyl) Oxazolidin-2-one) in the Presence of an Algerian Activated Clay

Anomalous Sorption of Yttrium Ions by the Mutual Activated Hydrogels in the Interpolymer System of Poly(Methacrylic Acid) and Poly(4-Vinylpyridine)

“…By acid activation of raw Maghnite with a 0.25M H 2 SO 4 solution, there is a complete cationic exchange of Maghnite by protons, without destroying its structure. 39 The Mag-H + obtained is widely used in the ring-opening polymerizations 26,[40][41][42][43][44][45] , also in the synthesis of bis-macromonomers 6,7,46 , and it has many advantages such as very low purchase price compared to other catalysts and the easy removal of the reaction mixture, regenerated by heating to a temperature above 373 K. 40,41 In our work, we were interested in using a new method for a green synthesis of telechelic PGPTMS with acetate and methacrylate end groups, in bulk, using one step, by cationic ring-opening polymerization of 3-glycidoxypropyltrimethoxysilane (GPTMS), in the presence of acetic anhydride (AA) and methacrylic anhydride (MA), using a green catalyst Mag-H + without spending energy. The best results in term of activation and yield of the product are determined using the kinetic study on the evolution of the synthesis reaction.…”

Biosynthesis and Characteristics of Polyhydroxyalkanoates. 1. Polyhydroxybutyrates of Azotobacter vinelandii N-15

“…To circumvent these limitations, in this paper we use a new method to synthesise PEGDMs with different molecular weight of PEG (1000, 3000, 6000, and 8000 g/mol) using an Algerian montmorillonite clay called Maghnite-H + as a catalyst. In our previously published work we have shown the advantage of different applications of this catalyst type in several polymerization reactions [14]. It is preferred for its many advantages such as very low purchase price compared to other catalysts and the easy of removal of the reaction mixture, regenerated by heating to the temperature above 373 K [15].…”