Abstract
Copolymers of isobutylene and p-methylstyrene [poly (IB-PMS)] represent a new type of elastomer with a saturated hydrocarbon backbone. This polymer has many desirable properties such as good environmental and aging resistance. However, these polymers have low reactivity and are incompatible with most other polymeric materials. We have developed a new method of directly modifying poly (IB-PMS) copolymer by the electrophilic substitution reaction of aromatic rings of the copolymer using Friedel-Crafts acylation chemistry. This paper deals primarily with synthesis and characterization of functionalized poly (IB-PMS) copolymers using succinic anhydride as an acylating agent and a Lewis acid, aluminum chloride, as a catalyst. This ring functionalization approach enables selective functionalization of the aromatic ring of p-methylstyrene in the copolymer. This is a general approach that can be extended to other catalysts or acylating agents to generate different functionalized polymers.
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