Copolymers via Acyclic Diene Metathesis Polymerization and Living ..
Acyclic diene metathesis polymerization: History, …
Another method of achieving the desired molecular weight is byaddition of a small amount of monofunctional monomer, a monomerwith only one functional group. The monofunctional monomer, oftenreferred to as a chain stopper, controls and limits thepolymerization of bifunctional monomers because the growing polymeryields chain ends devoid of functional groups and thereforeincapable of further reaction.
Acyclic Diene Metathesis (ADMET) Polymerization
A more general functionality factor fav is definedfor multi-chain polymerization, as the average number of functionalgroups present per monomer unit. For a system containingN0 molecules initially and equivalent numbers of twofunction groups A and B, the total number of functional groups isN0fav.
Ring-opening polymerization; Acyclic diene metathesis; ..
The distinction between "step-growth polymerization" and"chain-growth polymerization" was introduced by in , and refers to the , respectively:
Living ring-opening metathesis polymerization ..
A monomer with functionality 3 will introducebranching in a polymer and will ultimately form amacrostructure or network even at low fractional conversion. Thepoint at which this three-dimensional structure is formed is knownas the becauseit is signalled by an abrupt change in . One of the earliest so-called is known as . It is not always water that isreleased in step-growth polymerization: in orADMET dienes polymerize with loss of .