By Philippe Dubois, Olivier Coulembier, Jean-Marie Raquez
This complete, actually one-stop reference discusses monomers, equipment, stereochemistry, commercial functions and extra. Chapters written via across the world acclaimed specialists of their respective fields hide either easy rules and updated details, starting from the managed ring-opening polymerization how to polymer fabrics of commercial curiosity. All major periods of monomers together with heterocyclics, cyclic olefins and alkynes, and cycloalkanes, are mentioned individually in addition to their specificities in regards to the ring-opening polymerization recommendations, the mechanisms, the measure of keep watch over, the houses of the comparable polymers and their purposes. the 2 final chapters are dedicated to the implementation of eco-friendly chemistry in ring-opening polymerization processes.
Of a lot curiosity to chemists in academia and industry.
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Extra info for Handbook of Ring-Opening Polymerization
9), the -bl- content in the copolymer should not exceed 50 mol%. Thus, one could expect the formation of a close to alternating copolymer at a sufﬁciently large excess of BL. In fact, the 13C NMR spectral analysis pointed towards a pseudoperiodic copolymer structure . The BL/CL copolymer synthesis was successful, despite the fact that BL monomer addition to its own -bl* active chain ends was highly reversible, as the -bl* unit could be blocked via a practically irreversible CL addition. e. [BL] > [CL]), then BL addition proceeds faster than that of CL.
20d) Since the interaction range between repeating units in polymer molecule is rather limited, the diad model operates satisfactorily for many copolymerization systems. 20, it can be easily shown that: [M1 ]eq = ⎡. . -m1m1* ⎤ ⎣ ⎦ eq * ⎡ ⎤ K 11 ⎣. . -m1 ⎦ ]eq ⎛ ⎡. . -m1m1* ⎤ ⎞ ⎦ eq ⎟ ⎜⎣ ⎜ ⎡. . 21a) −1 ⎡. . -m2m1* ⎤ ⎞ ⎣ ⎦ eq ⎟ < ⎡. . -m1m1* ⎤ ⎟ ⎠ ⎣ ⎦ eq copo ⎛ ⎡. . -m1m1* ⎤ ⎞ ⎦ eq ⎟ ⎜⎣ ⎜ ⎡. . homo. The equilibrium concentration of comonomer M1 (or M2) in copolymerization is lower than that in homopolymerization because the cross-propagation reduces the concentration of the …–m1m1* (or …–m2m2*) centers.
27d) where Pi* denotes the living macromolecule, T is the deactivating agent, Pn is the temporary deactivated macromolecule, ktr2 is the rate constant of the bimolecular transfer to polymer with chain rupture, and kda and ka are the rate constants of temporary deactivation and activation, respectively. e. ka ≥ kp[M]) since, under this condition, the system comprises exclusively macromolecules that are capable of growth. 29) For the strained three- and four-membered monomers, [M]eq ≈ 0. 29 for the higher-membered monomers seems self-evident.