ABSTRACT
This chapter demonstrates that carbocationic polymerization has been developed to the stage where a large number of telechelics, which are not accessible by other methods, can be synthesized. In order to synthesize telechelics from methylpropene via a typical cationic mechanism, it is essential that the initiation, the propagation, and the termination or transfer reactions can be controlled. Telechelics with olefinic end-groups are useful intermediates for a wide variety of telechelic derivates. The reaction of the iodine-terminated telechelic with hexamethylenediamine (HMDA) leads to polymers with higher molar masses than the starting telechelics. The reaction of the iodine-terminated telechelic with HMDA leads to polymers with higher molar masses than the starting telechelics. These results indicate that the telechelic polymer reacted with both ends of HMDA to induce a chain extension reaction. Polymethylpropene carrying a tert-chloride end-group has been quantitatively converted to a variety of derivatives. Divinylbenzene usually yields insoluble cross-linked polymers from radical and anionic polymerizations.
