Cyclophosphazene pendant groups

Other Ways of Making Polymers Containing Cyclophosphazene Pendant Groups... 

Similar to polymers 36 and 37, polynorbomenes containing cyclophosphazene pendant groups (x = 2, 3) (34) also form complexes with lithium salts. These show ionic conductivities of the order of 10 Scm . The polymer-Li salt complex formed with polymer 34 (x = 1) with a shorter oligoetiheroxy substituent does not show appreciable ambient temperature ionic conductivity. 

Ring opening metathesis polymerization (ROMP) of norborenes with a cyclophosphazene side group (104) in presence of the ruthenium catalyst (PCy3)2Ru(Cl2)CHPh has shown to yield organic polymers with a cyclophosphazene as pendant group (105). °... 

An organic polymer containing a cyclophosphazene ring as a pendant group... 

There are many other polymers that are related to the polyphosphazene family. Thus, there are polymers which are actually made up of an organic backbone but contain a cyclophosphazene ring as a pendant group appended in their side chain. Other polymers that are related to polyphosphazenes are those that contain a third hetero atom in the backbone. Examples of such polymers are shown in Fig. 3.2. 

Most of the polymers that contain cyclophosphazenes as pendant groups are prepared by polymerizing cyclophosphazene containing vinyl monomers. The vinyl group is attached to the cyclophosphazene ring either directly or through a spacer group. Recently, alternative procedures are also... 

One of the recent methods that has been applied for preparing polymers containing cyclophosphazene rings as pendant groups is by ring-opening metathesis polymerization (ROMP). The principles involved in the application of this strategy to cyclophosphazene monomers are as follows. 

The use of cyclophosphazene in the formulation of flame retardant materials has generated numerous patents. " Various known cyclo-matrices based on phosphazene bismaleimide or triazine and, especially, the styrene polymer (159) having cyclo-alkoxy or aryloxy-phosphazenes as pendant groups, have been found to be resistant to atomic oxygen, probably by the formation of a protecting layer of phosphate. " ... 

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