except using Si-g-PMMA hybrid material as macro chain transfer agent
and NIPAM as the second monomer via a conventional ITP process.
No chain transfer agent (CTA) was added to regulate the molecular weight except for the sample set used in the evaluation of molecular weight effect.
As previously mentioned, the polymer molecular weight is primarily controlled by the amount of chain transfer agent (CTA) added during polymerization.
Nevertheless, the increase in molecular weight can be independently handled (if so desired) by adding more chain transfer agent (discussed in the next section).
This section illustrates how average molecular weights (and branching frequencies) can be controlled by manipulating the flow rate of chain transfer agent (CTA).
4, 5) In this strategy the optimal trajectories of monomers and chain transfer agent
(CTA) that allow the production of a given MWD and copolymer composition are first determined.
MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] (transfer to chain transfer agent
) Because of the high reactivity of fluorocarbon active chains, almost any type of organic compound can act as a chain transfer agent
i], is a dead polymer chain of size i, while CTA represents a chain transfer agent
CTA = total of chain transfer agent
in the reactor,
Unlike the other two chain transfer agents
in Table 1, hydrogen probably does not act preferentially on the phosphate sites.
By addition of a chain transfer agent
(OTA), the molecular weight of the polymers formed can be controlled.
Functionalization and Block/Graft Reactions of Syndiotactic Polystyrene Using Borane Comonomers and Chain Transfer Agents