𝔖 Bobbio Scriptorium
✦   LIBER   ✦

The group-termination coefficient in the analysis of polymerizations with size-dependent termination coefficients-explicit expressions for molecular weight distributions

✍ Scribed by C.H. Bamford

Publisher
Elsevier Science
Year
1990
Tongue
English
Weight
587 KB
Volume
26
Category
Article
ISSN
0014-3057

No coin nor oath required. For personal study only.

✦ Synopsis

Results described in an earlier paper on the application of the group-termination coeificient to free-radical polymerizations with size-dependent k t have been used in deriving explicit expressions for polymer molecular weight distributions and related quantities. Three types of polymerization are treated: those showing simple chain transfer, chain transfer + degradative addition and ideal retardation. In each case, termination by radical disproportionation and combination are considered. The applicability of the Mayo equation for determining transfer constants in systems with size-dependent k t is analysed.

📜 SIMILAR VOLUMES

The “group-termination coefficient” in t
The “group-termination coefficient” in the analysis of kinetic schemes of polymerizations with size-dependent termination coefficients
✍ C.H. Bamford 📂 Article 📅 1989 🏛 Elsevier Science 🌐 English ⚖ 509 KB

The concept of the "group-termination coefficient" is described together with its applications to the kinetic treatment of free-radical polymerizations in which the termination coefficient is a function of radical size. Basically the procedure involves the mean size of a group of radicals and the to

Non-stationary states in free-radical po
Non-stationary states in free-radical polymerizations with size-dependent termination. Studies by the group-termination procedure—3. Further consideration of after-and pre-effects and evaluation of absolute coefficients
✍ C.H. Bamford 📂 Article 📅 1994 🏛 Elsevier Science 🌐 English ⚖ 486 KB

Al~traet--In earlier studies of the kinetic quantities in non-stationary stages of non-classical free-radical polymerization a relation between the total pre-and after-effects (AMos, AM~, respectively) and the rate coefficients kp kto was proposed. This arose from the results of numerical computatio