PEER polymers

PEER Polymers New Unsaturated Polyesters for Fiber-Reinforced Composite Materials... 

Up to this point, the zinc-chloride-catalyzed PEER polymer can be considered as a first-generation PEER polymer. The product was prepared in glass reactors in small quantities. Nevertheless, it showed very interesting properties. 

PEER POLYMERS NEW UNSATURATED POLYESTERS 3.4 LIQUID PROPERTIES OF PEER RESINS... 

PEER polymers can be cured with traditional radical initiators such as methyl ethyl ketone (MEK) peroxides and benzoyl peroxide (BPO). Curing can be carried out either at room temperature or at elevated temperature. A PEER polymer containing 30 % maleic anhydride can be cured at room temperature with MEK peroxides in 10 to 60 min, depending on the type of peroxide used (Table 22.2). To cure a PEER resin with MEK peroxides at room temperature, a co-catalyst is needed. The commonly used cobalt naphthenate works very well in this case, while another co-catalyst, dimethyl aniline, is very efficient for the BPO system. 

Table 22.2 MEK peroxide as curing agent for a peer polymer containing 30 % unsaturation...

Table 22.4 Properties which can be adjusted in the 1st stage of the PEER polymer synthesis by varying the maleic anhydride content to change the cross-link density0...

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