Crohns-disease
发表于 2025-3-25 03:45:19
From Anionic to Ziegler-Natta Polymerization: Application to the Determination of the Reactivity ofleast 80% of C-Ti bonds participate in the homo- and co-polymerization of ethylene and propene, leading to vinylicolefinic type block copolymers..The “living character” of the Ziegler-Natta complexes is deduced from both the macromolecular features of the poly-olefinic blocks and the kinetic studie
Libido
发表于 2025-3-25 09:03:33
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DNR215
发表于 2025-3-25 13:10:38
Synthesis of Polyaryletherketonesditions; analagous reactions between dicarboxylic acids and aryl ethers have been under investigation since 1968. Polyether synthesis by reaction of .-4-halogenobenzoyl compounds with .-phenoxides provides an alternative route to polyaryletherketones and this was reported first in 1963. Initially, b
tattle
发表于 2025-3-25 19:27:05
Group Transfer Polymerization of Methyl Methacrylate with Basic Catalyststetrabutylammonium cyanide (Bu.NCN) is recommended as catalyst. It is soluble in tetrahydrofuran, an as powerful catalyst as TPSF.H, but less active in the oligomerization reaction of MTS. Its initiation of an anionic polymerization of MMA can be neglected under the reaction conditions of the GTP.
Ringworm
发表于 2025-3-25 20:58:25
Living and ’Immortal’ Polymerizations of Epoxide with Metalloporphyrin Catalyst molecular weight distribution of polymer. These behaviors are much different from ‘living’ polymerization, and a new concept of ‘immortal’ polymerization is presented. Unusual reactivity of the aluminum-axial group bond of aluminum porphyrin is the origin of “immortality” of the polymerization.
Ordnance
发表于 2025-3-26 03:35:55
Recent Progress in the Use of Phase Transfer Catalysis for Polycondensation Reactions. Application tsulting polymers. End-to-end cyclization dynamics in dilute solution was studied for a polycarbonate. Interesting thermal properties were found in the case of polyesters for which an odd-even effect was detected.
努力赶上
发表于 2025-3-26 07:55:40
The Anionic Polymerization of Alkyl Acrylates : A Challengeh as lithium chloride, exhibit an important regulating effect in the anionic polymerization of alkyl acrylates. Indeed, side-reactions are now controlled to such an extent that the propagation is a living process and leads to polymers with an unimodal and narrow molecular weight distribution.
placebo-effect
发表于 2025-3-26 11:41:33
From Anionic to Ziegler-Natta Polymerization: Application to the Determination of the Reactivity of s of C.H. and C.H. polymerizations..From all the kinetic data obtained and on the basis of a two-steps propagation mechanism, the rate determining step is found to be complexation for C.H. polymerization and insertion in the case of C.H..
痛苦一下
发表于 2025-3-26 12:48:31
1389-2185 . Owing to the wide variability of their properties, these specialty polymers have been used in various areas from biomedical engineering to electronics or energy applications. The synthesis of such polymers necessi tates the use of new methods of polymerization which derived from an insight into t
600
发表于 2025-3-26 20:05:48
m.· Navigating the politically and ideologically charged environments in which researchers must remain constantly attuned to the legal and public policy implications of their work.· Possibilities for participatory sex work research processes.· Strategies for incorporating participants in a variety o