- Preparation of a bulky cycloolefin/ethylene copolymer and its tensile properties
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Regioselective partial hydrogenation of tricyclopentadiene (TCPD) was achieved with a high turnover number of 10000 by catalysis with a N-heterocyclic carbene-palladium complex. Copolymerization of ethylene and the partially hydrogenated product, dihydrotricyclopentadiene (HTCPD), was realized using a catalytic system, of [8-(η5-C5Me4)-2- Me(C9H8N)-kN]TiMe2 (C9H 10NH = 1,2,3,4-tetrahydroquinoline) activated with (Ph 3C)+[B(C6F5)4] -. The copolymer was unambiguously characterized through the analysis of one- and two-dimensional NMR spectra. The monomer reactivity ratios, r ethylene and γHTCPD. determined through the Fineman-Ross plot, were 2.8 and 0.025, respectively, indicating negligible successive insertion of two HTCPD. A nearly alternating copolymer with a HTCPD content of 45 mol % was obtained with a satisfactory activity (4.7 x 10 6 g/(mol Ti h)), of which Tg was 177 °C, significantly higher than that of norbornene/ethylene copolymer at the same cycloolefin content. Tensile stress-strain curves indicated that the brittleness observed for a high-.Tg norbornene/ethylene copolymer was relieved to show some ductile property for the HTCPD/ethylene copolymer of the same level of high Tg.
- Yu, Seung Tack,Na, Sung Jae,Lim, Tae Sun,Lee, Bun Yeoul
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- Synthesis of high-density liquid fuel via Diels-Alder reaction of dicyclopentadiene and lignocellulose-derived 2-methylfuran
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A process via Diels-Alder reaction of lignocellulose-derived 2-methylfuran and petroleum-derived dicyclopentadiene following by hydrodeoxygenation was proposed to synthesize a new kind high-density liquid fuel. The results show that the catalysts, temperature and reactant ratio can affect the product distribution of Diels-Alder reaction greatly. Among the investigated catalysts, HY zeolite exhibited the best catalytic activity and showed good recycling ability. Over HY zeolite, high conversion of reactants along with acceptable selectivity of the target products was obtained, under the reaction temperature of 150 °C and 2-MF/DCPD ratio of 2:1. After hydrodeoxygenation, the as-obtained fuel has a density of 0.984 g/mL, much higher than that of widely used JP-10 fuel (0.94 g/mL), a low freezing point of ?58 °C and a volumetric neat heat of combustion of 41.96 MJ/L. Furthermore, a blended fuel with 25% JP-10 exhibits high density and excellent cryogenic properties, which is very promising to serve as high-density fuel for advanced propulsion application.
- Xie, Junjian,Zhang, Xiangwen,Liu, Yakun,Li, Zheng,E, Xiu-tian-feng,Xie, Jiawei,Zhang, Yong-Chao,Pan, Lun,Zou, Ji-Jun
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p. 139 - 144
(2018/05/08)
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- Pure Tricyclopentadiene and Method of Preparing the Same
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The present invention relates to pure tricyclopentadiene and a method for preparing the same. More specifically, the present invention relates to pure tricyclopentadiene which can be effectively used in various fields, such as a packaging material, a DVD material, an optical film, a copper clad laminate, etc., by preventing a side reaction and gelation generated during polymerization by easily removing pentacyclo[9.2.1.1^(4,7.)0^(2,10).0^(3,8)]pentadecane-5,12-diene, which generates the side reaction and gelation during the polymerization, with a simple method using fractional distillation; and by manufacturing a cycloolefin polymer compound having excellent dielectric properties and a high heat resisting property by introducing the pure tricyclopentadiene, from which pentacyclo[9.2.1.1^(4,7).0^(2,10).0^(3,8)]pentadecane-5,12-diene is removed, into a cycloolefin monomer. The present invention also relates to a method for preparing the pure tricyclopentadiene.COPYRIGHT KIPO 2016
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Paragraph 0030; 0064-0069
(2016/11/09)
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- Process for producing norbornene derivatives
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The invention relates to a process for producing alkyl norbornene derivatives which are useful for radically curable compounds or as precursors of epoxy compounds. The process comprises: reacting an allyl compound (A) having an allyl group represented by the following formula (1), wherein R 1 represents a hydrogen atom, an alkyl group, a hydroxyl alkyl group, or an alkoxy alkyl group, with alkyl-cyclopentadiene dimer (B).
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Page/Page column 11-12
(2008/06/13)
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- STEREOCHEMICAL FEATURES OF THE DIENE SYNTHESIS REACTION OF CYCLOPENTADIENE WITH DIENOPHILES OF THE NORBORNENE AND NORBORNADIENE SERIES
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The stereochemistry of the products from the reaction of cyclopentadiene with tetracyclo2,5.17,10>dodec-3-ene, endo- and exo-dicyclopentadiene, endo-dihydrodicyclopentadiene, bicyclohepta-2,5-diene, and endo,exo- and endo,endo-tetracyclo2,5.17,10>dodeca-3,8-diene was investigated.The presence, at the endo position of the dienophile, of a group which sterically hinders orientation of the cyclopentadiene with the methylene group in the trans position to the methylene group of the bicycloheptane system of the dienophile makes it possible for the corresponding exo,exo-dimethanonaphthalene derivatives to form.During the condensation of cyclopentadiene with bicyclohepta-2,5-diene the stable endo,endo adduct is formed in addition to the endo,exo structure.
- Kolesnikov, R. V.,Grigor'ev, A. A.,Vinberg, L. B.,Yampol'skii, Yu. Yu.,Zhavoronkov, I. P.
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p. 901 - 908
(2007/10/02)
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- Diels-Alder-Reactions. IX. On the Formation and the Thermolysis of Isomeric Tricyclopentadienes
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The formation of isomeric tricyclopentadienes by codimerisation of cyclopentadiene with endo- and exo-dicyclopentadiene between 100 and 140 deg C in the liquid phase, and the retrodiene reaction of the main isomers of the tricyclopentadiene fraction by gas phase thermolysis were studied kinetically between 230 and 310 deg C.The rate constants and the parameters of activation were determined.
- Ramhold, K.,Moll, K. K.,Roschka, E.,Zimmermann, G.,Smola, Th.,Krukowka, L.
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p. 924 - 934
(2007/10/02)
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- Diels-Alder-Reactions. VIII. Kinetic Investigations of the Formation and the Pyrolysis of Tetracyclo3.6.02.7>dodec-4-en
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The formation of tetracyclo3.6.02.7>dodec-4-ene by codimerisation of cyclopentadiene with bicyclohept-2-ene between 60 and 140 deg C in the liquid phase and the inverse reaction by gas phase pyrolysis between 240 and 300 deg C were studied kinetically.The activation parameters were determined.
- Moll, K. K.,Ramhold, K.,Zimmermann, G.,Pohle, Ch.
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p. 1048 - 1052
(2007/10/02)
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