- Polymerization kinetics of adamantane-based dicyanate ester and thermal properties of resulting polymer
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The kinetics of liquid-state polymerization of adamantane-based dicyanate ester has been studied for the first time by means of conventional and temperature-modulated DSC. It has been detected that the later stages of polymerization undergo a transition from kinetic- to diffusion-controlled regime. Detailed analysis of the polymerization kinetics in the reaction-controlled regime has revealed that the process rate can be well described in the frameworks of the presently proposed autocatalytic quasi-one-step model. The proposed model eliminates arbitrarily guessing the value for the initial conversion that provides a reasonable alternative to the broadly used truncated Sestak-Berggren model. The adamantane-based dicyanate ester polymerization product demonstrates markedly higher thermal stability and glass transition temperature compared to those of dicyanate esters with flexible hydrocarbon bridging units. The obtained experimental results confirm our hypothesis about the influence of the rigidity of cyanate ester molecule on its reactivity and thermal properties of the corresponding polymer product.
- Galukhin, Andrey,Islamov, Daut,Nikolaev, Ilya,Nosov, Roman,Taimova, Guzel,Vyazovkin, Sergey
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- Adamantane-based epoxy resin and siloxane-modified adamantane-based epoxy resin: Characterization of thermal, dielectric and optical properties
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An adamantane-based epoxy resin (ADEP) and a siloxane-modified adamantane-based epoxy resin (Siloxane-ADEP) were synthesized, and their chemical structures were confirmed from FT-IR, 1H, 13C and 29Si NMR spectroscopy measurements. The morphological, thermal, dielectric and optical properties of ADEP and Siloxane-ADEP were studied. The introduction of the adamantane group into the chain of the epoxy resin resulted in improvements in the thermal, mechanical and dielectric properties. These results can be explained in terms of the tricyclic hydrocarbon of the adamantane in a diamond lattice structure and the movement of polymer chains being limited by chair-form cyclohexane rings, resulting in an immobile epoxy structure. Moreover, Siloxane-ADEP exhibited good thermal, mechanical and dielectric properties that were similar to those of epoxy resin, and its better processability may extend its application to electronic packing materials. The UV-Vis transmission spectra revealed that the adamantane-containing epoxy membranes exhibited novel ultraviolet light-filtering properties.
- Tsai,Wu,Yang,Wang
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- Organic compound, electronic component and electronic device
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The invention belongs to the technical field of organic materials, and particularly provides an organic compound which is of a structure formed by taking adamantyl as a core and connecting two nitrogen-containing heteroaryl groups to adamantane through a connecting group. The compound is suitable for being applied to an electron transport layer of an electronic component. The invention also provides an electronic component and an electronic device comprising the compound. The organic compound can improve the electron transport performance of the electronic component.
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Paragraph 0173-0177
(2020/09/20)
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- Dielectric materials
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The present invention relates to a novel class of polymers which can be used as dielectric material for the preparation of passivation layers in electronic devices. The polymers are prepared from polymerizable compounds having mesogenic groups and they pr
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Paragraph 58
(2020/02/20)
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- Cyanate ester compound, curable resin composition containing the same, and hardened product thereof
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The present invention is a cyanate ester compound represented by the following formula (1): wherein Ar represents an aromatic ring; R1 each independently represents a hydrogen atom, an alkyl group, or an aryl group; n each independently represe
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Page/Page column 38-39
(2018/04/25)
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- Amine derivative containing adamantane structure and preparation method and application thereof
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The invention relates to an amine derivative containing an adamantane structure and a preparation method and application thereof. The amine derivative solves the technical problem that in the prior art, a small quantity of adamantane and adamantane derivatives are applied to high polymers. The invention further discloses a molecular formula, the preparation method and application of the amine derivative. The amine derivative can meet the application requirement for electronic and composite materials and can be widely applied to aerospace, defense industry and other fields.
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Paragraph 0028; 0029; 0030
(2016/10/07)
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- REACTION OF PHENOL WITH 3-METHYLENEBICYCLONONAN-7-ONE IN THE PRESENCE OF ALUMINUM DIPHENYL DITHIOPHOSPHATE
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The reaction of phenol with 3-methylenebicyclononan-7-one in the presence of aluminum diphenyl dithiophosphate led to a mixture of the isomeric 1,3-bis(hydroxyphenyl)adamantanes, 1-hydroxyphenyl-3-hydroxyadamantanes, and 3-hydroxy-1-adamantyl phenyl ether, in which 1,3-bis(2-hydroxyphenyl)adamantane usually predominated.
- Kozlikovskii, Ya. V.,Koshchii, V. A.,Rodionov, V. N.,Yurchenko, A. G.,Olifirov, D. I.
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p. 1100 - 1103
(2007/10/02)
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