Applications of the Alder Ene reaction may be found primarily in the patent literature (14-17).
2% butadiene termonomer) via the Alder Ene reaction at 270 [degrees] C in a Brabender PLE 651 plastograph.
However, the vinylidene group was not anticipated as an isomer of the Alder Ene reaction in the present system, and therefore should not interfere with our analysis.
Identification of the double bond vibrations in EPDM was much more difficult than the succinyl group, because of limited published infrared peak assignments for the internal, hindered vinyl in ENB and its possible isomers resulting from either isomerization or the Alder Ene reaction.
The succinyl anhydride group does not appear to be useful for discriminating between free radical induced grafting and Alder Ene reaction.
The samples produced by the Alder Ene reaction (samples 43F and 58F) in Fig.
It was previously observed with polypropylene (21) that maleation via the Alder Ene reaction at temperatures above 230 [degrees] C exhibited side-reactions such as isomerization and homopolymerization of maleic anhydride.
The catalytic behavior of stannous chloride at high temperatures in the Alder Ene reaction between maleic anhydride and polypropylene has been observed in previous studies (20, 21); however, the findings above demonstrate the possibility of optimizing the reaction by examining other Lewis acid species where the optimal Lewis acid species would presumably be reaction system specific.