Zobrazeno 1 - 10
of 59
pro vyhledávání: '"EMILE FRANTA"'
Publikováno v:
Journal of Polymer Science Part A: Polymer Chemistry. 45:2576-2579
Publikováno v:
Polymer International. 51:912-922
Hydrogels based on poly(ethylene oxide) (PEO) are suitable materials for numerous biomedical applications. Among the different ways to design such hydrogels, homopolymerization of bifunctional PEO macromonomers represents a promising approach. The pr
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:
Paul Rempp, Emile Franta
Publikováno v:
Macromolecular Symposia. 91:51-63
Ionic living polymerization methods are well suited for the synthesis of macromolecules of known structure, molecular weight and composition, and exhibiting low fluctuations in composition and in molecular weight. They were the first to allow the syn
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:
Journal of Macromolecular Science, Part A. 31:891-909
The development of “macromolecular engineering” owes much to living anionic polymerizations. When carried out under conditions preventing spontaneous transfer and termination reactions, and with efficient initiators, these processes are well suit
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