Abstract
Anionic homo- and copolymerization of p-diethynylbenzene in the presence of n-BuLi in polar solvents was carried out. The use of hexamethylphosphortriamide (HMPA) makes it possible to synthesize a completely linear soluble polymer that does not have branching and phenylene fragments. A copolymer of p-diethynylbenzene with diphenyldiacetylene was synthesized. Homo- and copolymers of p-diethynylbenzene have high thermo- and thermo-oxidative stability. By the interaction of side reactive ethynylphenylene groups with various reagents, it is proposed to synthesize clusters along the conducting chain of poly-p-diethynylbenzene. Due to presenting C≡CH side groups, boron, copper, and cobalt derivatives were synthesized. It is shown that not all theoretically possible stereoisomers can be formed as a result of the polymerization. The application of p-diethynylbenzene polymers for the modification of industrial samples of epoxy novolac resin, oligoester acrylates, and carbon fibers has been demonstrated.
Highlights
A large number of publications devoted to the synthesis and study of the physicochemical properties of substituted polyacetylenes and polydiacetylenes is explained by their unique properties such as thermo- and solvatochromism, optical characteristics, catalytic activity, and photoelectric sensitivity [1,2,3,4,5]
A wide variety of initiators are used for polyDEB synthesis, including quite rare and exotic ones [1,3,4,5]
This article is devoted to the homo- and copolymerization of p-diethynylbenzene (DEB) in the presence of n-Butyl Lithium (n-BuLi) and to the study of the structure of the obtained polymers
Summary
A large number of publications devoted to the synthesis and study of the physicochemical properties of substituted polyacetylenes and polydiacetylenes is explained by their unique properties such as thermo- and solvatochromism, optical characteristics, catalytic activity, and photoelectric sensitivity [1,2,3,4,5]. A wide variety of initiators are used for polyDEB synthesis, including quite rare and exotic ones [1,3,4,5]. In these cases, branched and/or cross-linked polymer chains are usually obtained, which may have vinyl links and phenylene fragments. This article is devoted to the homo- and copolymerization of p-diethynylbenzene (DEB) in the presence of n-Butyl Lithium (n-BuLi) and to the study of the structure of the obtained polymers. The fundamental possibility of synthesizing a soluble DEB homopolymer with a previously unknown linear structure was reported
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