Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Léonard Reibel"'
Publikováno v:
Polymer International. 49:703-711
A new lithium perfluoroakylsulfonate has been synthesized from a commercial perfluorovinylether fitted with a fluorosulfonyl group. By making use of the vinylether group, this species was incorporated into polyurethane networks based either on a poly
Publikováno v:
Macromolecular Symposia. 107:219-226
Conditions are given that allow the preparation of highly amphiphilic triblock copolymers where the central block is a perfluoropolyether (number average molar mass equal to 2000) only soluble in freon-type solvents, and the outside blocks are made o
Autor:
S. Ould. Kada, Nabahat Sahli, Léonard Reibel, Pierre J. Lutz, Emile Franta, Mohammed Belbachir
Publikováno v:
Macromolecular Symposia. 85:167-174
1,3-Dioxolane was polymerized in the presence of ethylene glycol in order to prepare α,ω-dihydroxylated polymers which, upon reaction with pluriisocyanates yielded networks swellable in water. The crosslinks were made of urethane groups, which are
Publikováno v:
Makromolekulare Chemie. Macromolecular Symposia. 73:117-125
The synthesis of 1,2-epoxy-3-nitropropane (ENP) was improved so that this monomer could be obtained in a pure, stable form with an acceptable yield. Anionic polymerization even using milder conditions causes isomerization of ENP into nitroallylic alc
Publikováno v:
Makromolekulare Chemie. Macromolecular Symposia. 60:145-154
Classical initiation induces polymerization through cyclic tertiary oxonium ions which are responsible for the formation of an important quantity of cyclic oligomers. The activated monomer mechanism, i.e. polymerization in the presence of a diol, has
Publikováno v:
Die Makromolekulare Chemie. 193:1087-1097
The early stage of cationic polymerization of 1,2-epoxy-3-nitropropane in the presence of ethylene glycol and borontrifluoride etherate is examined. It is shown that the reaction proceeds according to the Activated Monomer Mechanism: initiation and p
Publikováno v:
Die Makromolekulare Chemie. 193:1109-1116
Cationic polymerization of 1,2-epoxy-3-nitropropane was performed in the presence of ethylene glycol and borontrifluoride etherate under conditions meant to favor the Activated Monomer Mechanism. In two previous papers, we showed that the Activated M
Publikováno v:
Die Makromolekulare Chemie. 193:1099-1108
The cationic polymerization of 1,2-epoxy-3-nitropropane (ENP) in the presence of ethylene glycol and boron trifluoride etherate is studied. The reaction was performed by adding the monomer stepwise in the reaction medium, so that the instantaneous mo
Autor:
Emile Franta, Léonard Reibel
Publikováno v:
Makromolekulare Chemie. Macromolecular Symposia. 47:141-150
The polymerization of tetrahydrofuran under a living form allows quantitative functionalisation as well as the formation of copolymers. Cyclic acetal polymerization is more complex but through the “Activated-Monomer Mechanism” approach, it is pos
Publikováno v:
Die Makromolekulare Chemie. 191:1689-1698
Polyurethane networks whose elastic chains are constituted of hydrophilic poly(1,3-dioxolane) of well-defined molecular weight were synthesized using an end-linking process. The poly(1,3-dioxolane) (PDXL) precursor polymers, fitted with OH functions