60Co γ-rays irradiation modified p-diethynylbenzene as prepolymers to prepare polyarylacetylene with excellent heat resistance

Anionic Polymerization of Para-Diethynylbenzene: Synthesis of a Strictly Linear Polymer

“…In [ 41 ], only two isomers of the model monosubstituted polyacetylene (trans-transoid chain and cis-transoid chain) with different types of connection of links (head or tail) were considered, taking into account possible rotations of links around the C=C bond. The articles devoted to the synthesis of polyDEB almost always consider only the possibility of preferential formation of cis- [ 11 , 17 , 42 ] or trans- [ 43 , 44 ] isomers concerning the C=C bond of the main chain. However, it is theoretically possible to form four types of conformers ( VII – X ), including due to rotation around a single C–C bond.…”

“…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 ]. Homo- and copolymers of p -diethynylbenzene (DEB) as polyarylacetylene resins have additional properties that distinguish them in this class of polymers: good graphitization, high thermal resistance and increased coke residue, which is important when creating carbon-carbon composite materials for aviation and rocket engineering [ 6 , 7 , 8 , 9 , 10 , 11 , 12 ]. Using the DEB polymer, it was proposed to produce composites of carbon nanotubes [ 13 ] and quartz glass [ 14 ], Pt/C electrocatalysts with Pt nanoparticles in highly porous carbon spheres for fuel cells [ 15 ], humidity sensors [ 16 ], and micro-mesoporous meshes with increased adsorption capacity to hydrogen [ 17 ].…”

High‐yield production of p‐diethynylbenzene through consecutive bromination/dehydrobromination in a microreactor system

“…5 Therefore, PAA resins have been regarded as the next generation ablative materials favorable in aerospace/military field and potentially useful new materials of optoelectronic devices for applications in solar-to-fuel energy conversions. [6][7][8][9][10][11][12][13][14][15] However, their full commercial development has been discouraged by the absence of an efficient and safe method to produce the PAA monomer, p-diethynylbenzene (p-DEB). 16 Three syntheses routes: aromatics acylation, 17,18 trimethylsilylacetylene method, 19 and halogenation/dehydrohalogenationof divinylbenzene 1,20 have been developed to produce p-DEB.…”

Interpenetrating network nanoarchitectonics of antifouling poly(vinylidene fluoride) membranes for oil–water separation

“… 19 The highly active particles can act on the irradiated material and stimulate the active molecules or ions. 20 As a result, some reactions are difficult to be conducted by general thermochemical methods. When the γ-ray interacts with the irradiated material to generate energy transfer, ion pairs and excited molecules proportional to the absorbed dose will be produced, and the yield of both is roughly the same.…”