The chemistry of unsaturated ethylene‐propylene‐based terpolymers

Cesca, S.

doi:10.1002/pol.1975.230100101

Cited by 81 publications

(27 citation statements)

References 325 publications

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“…In particular, we know the relative reactivity of various monomers as a) SCF MO LCAO: Self-consistent field molecular orbital linear combination of atomic orbitals. copolymerization constants obtained when studying copolymerization on homogeneous metallocene 14) and heterogeneous 15) catalysts.…”

Section: Introductionmentioning

confidence: 99%

Quantum chemical studies of propene, ethylene, acetylene and dihydrogen reactivity in the insertion reaction into the titanium‐alkyl bond

Захаров

Zhidomirov

1996

Macro Theory & Simulations

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SUMMARYUsing the ab initio method of SCF MO LCAO") in a valency-splitted basis of the Gaussian functions we have studied the addition of various monomers (C3H8, C2H4, C2H2) and dihydrogen to the titanium-alkyl bond in the complex H2TiCH,. The structure of transition states in the insertion reaction, heats of x-complex formation and activation energies for the insertion of the coordinated monomers have been calculated. The calculation results show that the reactivity decreases in the order C2H2 > C2H, > C3HB > Hi?. According to the results obtained, the energy of the n*-antibonding orbital of monomers can serve as an index of relative reactivity in the insertion reaction into the metal-alkyl bond.

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Section: Introductionmentioning

confidence: 99%

Quantum chemical studies of propene, ethylene, acetylene and dihydrogen reactivity in the insertion reaction into the titanium‐alkyl bond

Захаров

Zhidomirov

1996

Macro Theory & Simulations

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“…[21][22][23][24] In comparison with abundant researches of addition homopolymerization of parent NB and other important commercial product of 5-vinyl-2-norbornene, [25][26][27][28][29][30] the homopolymerization or copolymerization of ENB as main comonomer in vinyl addition polymerization pathway is rarely reported in the literature. 31 The polymer achieved in this way posseses the exocyclic C=C double bond functionalities on the polymer side chain, which will provide reactive site for the further functionalization by post-polymerizations, such as epoxidation, crosslinking reaction, and/or graft polymerization as demonstrated in EPDM, which will be beneficial for expanding its performances and applications.…”

Section: Introductionmentioning

confidence: 99%

Addition polymerization of 5-ethylidene-2-norbornene by cationic palladium cationic complex and subsequent derivatization

Wang

Yang

et al. 2011

Macromol. Res.

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Poly(5-ethylidene-2-norbornene) (PENB) was synthesized via a vinylic pathway using a cationic palladium-based catalyst, displaying high activity up to 1.06×10 6 g-PENB/mol Pd. The effects of the monomer to catalyst ratio, temperature, reaction time, and concentration on the polymerization were investigated systematically. The control tests and spectroscopic analyses of the PENB indicate that 5-ethylidene-2-norbornene is polymerized via an addition polymerization using endocyclic double bonds. The post-modification was also performed using a free radical graft polymerization. The resulting PENB copolymers were characterized by IR, 1 H NMR, and GPC analyses.

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“…Commercially available DCP is almost exclusively the endo isomer formed from cyclopentadiene by dimerization according to the cis addition rule of Alder (7). However, the exo isomer is the thermodynamically more stable isomer (7). Copolymerization experiments have shown that the norbornene unsaturation in endo-DCP is twice as reactive as the cyclopentene unsaturation, exo-DCP is twice as reactive as the endo-DCF, and endo-DCP is 7.5 times more reactive than propylene (7).…”

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confidence: 95%

“…However, the exo isomer is the thermodynamically more stable isomer (7). Copolymerization experiments have shown that the norbornene unsaturation in endo-DCP is twice as reactive as the cyclopentene unsaturation, exo-DCP is twice as reactive as the endo-DCF, and endo-DCP is 7.5 times more reactive than propylene (7).…”

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confidence: 97%

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Plastic Sulfur Stabilization by Copolymerization of Sulfur with Dicyclopentadiene

Bordoloi

Pearce

1978

New Uses of Sulfur—II

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Liquid sulfur-dicyclopentadiene (DCP) solutions at 140°Cundergo bulk copolymerization where the melt viscosity and surface tension of the solutions increase with time. A general melt viscosity equation: η = ηo exp(aX b t), at constant temperature, has been developed, where η is the viscosity at time t for an S8-DCP feed composition of DCP mole fraction X; and ηo (in viscosity units), a (in time -1 ), and b (a dimensionless number, + ve for X < 0.5 and -ve for X > 0.5) are empirical constants. The structure of the sulfurated products has been analyzed by NMR. Sulfur noncrystallizable copolymeric compositions have been obtained as shown by thermal analysis (DSC). Dodecyl polysulfide is a viscosity suppressor and a plasticizer for the S8-DCP system. S ulfur is a readily available, high-purity and low-cost material (I). In in the western world 34.2 and 30.6 million tons of all forms of sulfur were produced and consumed, respectively (2). Fike (I) has pointed out some potential applicaitons of this material.Sulfur is used directly in sulfur-additive solutions which are used as coatings (3,4,5,6). Dicyclopentadiene is a potentially cheap material that can form copolymers with liquid sulfur. The patent literature reports applications of the sulfur-dicyclopentadiene system in sprayable coatings, rubber vulcanizates, etc. However, very little has been written on the chemistry, characterization, and properties of this system. Chemistry of the Sulfur-Die y dopent adiene ReactionBicyclo (2.2.1) heptene (norbornene), I, is a strained olefin. Dicyclo pentadiene (DCP), II, is a substituted norbornene, and it has two stereo

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The chemistry of unsaturated ethylene‐propylene‐based terpolymers

Cited by 81 publications

References 325 publications

Quantum chemical studies of propene, ethylene, acetylene and dihydrogen reactivity in the insertion reaction into the titanium‐alkyl bond

Quantum chemical studies of propene, ethylene, acetylene and dihydrogen reactivity in the insertion reaction into the titanium‐alkyl bond

Addition polymerization of 5-ethylidene-2-norbornene by cationic palladium cationic complex and subsequent derivatization

Plastic Sulfur Stabilization by Copolymerization of Sulfur with Dicyclopentadiene

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