ARTICLES - Asymmetric Polymerization Via Cycloaddition Reactions - The novel optically active monomer 2-methoxy-4-(1-propenyl)phenyl 2(S)-N-phthaloyl-4-methylpentanoate was synthesized from the reaction of N-phthaloyl-L-leucine acid chloride was isoeugenol in high yield. This chiral monomer was reacted with bis(triazolinedione)s as difunctional monomers and gave only one diastereomeric product (de 100%), which was proved by 1H-NMR data. Thus, it can act as a difunctional monomer in which the second functionality is produced during the course of reaction. Therefore, it is an interesting chiral monomer for tandem Diels-Alder-ene polymerization reactions (Unknown)
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In:
Journal of polymer science / A
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37
, 8
; 1211
;
1999
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ISSN:
- Article (Journal) / Print
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Title:ARTICLES - Asymmetric Polymerization Via Cycloaddition Reactions - The novel optically active monomer 2-methoxy-4-(1-propenyl)phenyl 2(S)-N-phthaloyl-4-methylpentanoate was synthesized from the reaction of N-phthaloyl-L-leucine acid chloride was isoeugenol in high yield. This chiral monomer was reacted with bis(triazolinedione)s as difunctional monomers and gave only one diastereomeric product (de 100%), which was proved by 1H-NMR data. Thus, it can act as a difunctional monomer in which the second functionality is produced during the course of reaction. Therefore, it is an interesting chiral monomer for tandem Diels-Alder-ene polymerization reactions
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Contributors:
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Published in:Journal of polymer science / A ; 37, 8 ; 1211
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Publisher:
- New search for: Wiley
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Place of publication:Hoboken, NJ [u.a.]
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Publication date:1999
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ISSN:
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Type of media:Article (Journal)
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Type of material:Print
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Language:Unknown
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Source:
Table of contents – Volume 37, Issue 8
The tables of contents are generated automatically and are based on the data records of the individual contributions available in the index of the TIB portal. The display of the Tables of Contents may therefore be incomplete.
- 1049
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TRIBUTE - A Tribute to Norbert M BikalesLovinger, A.J. et al. | 1999
- 1053
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RAPID COMMUNICATION - Syndiospecific Polymerization of Styrene: Activity Enhancement of Ti-MAO Catalytic Systems in the Presence of SnR4 Compounds - Addition of SnR4 compounds to titanium complexes-MAO catalytic systems for the synthesis of syndiotactic polystyrene lead to an improvement of polymer yields and an increase of molecular weightsPo, R. et al. | 1999
- 1057
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ARTICLES - Synthesis of Side Chain Liquid Crystalline Copolymers and Characterization of Their Polar Structure - A series of side chain liquid crystalline copolymers having different spacer lengths, copolymer compositions, and chromophore types were synthesized and characterized both in the bulk and at the gas-water interface. Copolymers with different compositions were investigated both as monolayers and transferred films. The isotherms suggest nanodomain formation at the gas-water interface in copolymers with high nitrobiphenyl (NBP) contentSrikhirin, T. et al. | 1999
- 1071
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ARTICLES - MAO-Free Polymerization of Propylene by rac-Me2Si-(1-C5H2-2-Me-4-tBu)2Zr (NMe2)2 Compound - The polymerization of propylene initiated by rac-Me2Si(1-C5H2-2-Me-4-t Bu2Zr(NMe2)2 complex cocatalyzed by AIR3 and (CPh3)(B(C6F5)4) compounds was investigated. The formation of cationic active species was also studied by the sequential NMR-scale reactions of the metallocene with AIR3 and then with (CPh3)(B(C6F5)4)Kim, I. et al. | 1999
- 1083
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ARTICLES - Catalytic Systems Me2SiCp*Nt BuMX2-(CPh3)(B(C6F5)4) (M=Ti, X=CH3 M=Zr, X=iBu) in Copolymerization of Ethylene with Styrene - High-molecular weight E-S copolymers with high styrene content (up to 20 mol %) were designed with Me2SiCp*NtBuTiMe2-CPh3B(C6 F5)4 catalyst at low ethylene pressures, moderate temperature, and high S-E ratios (see first figure). Only high-molecular weight homo-polyethylenes (homo-PEs) were produced with Me2SiCp*NtBuZrCl2-Alt Bu3-CPh3B(C6F5)4 catalyst (see second figure). Analysis of reactivity factors and 13C-NMR copolymer spectra revealed alternating E-S incorporation to Ti active sites. Primary styrene coordination was believed to thus activate the Ti--C bond; however, it temporarily blocks Zr centers toward the secondary insertionSukhova, T.A. et al. | 1999
- 1095
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ARTICLES - Complex-Radical Terpolymerization of Glycidyl(Methyl) Methacrylates, Styrene, and Maleic Anhydride - The ternary copolymerization of glycidyl(methyl) methacrylates, styrene, and maleic anhydride, which is considered as acceptor(A1)-donor(D)-acceptor(A2) system, were studied. Constants of copolymerization, complex-formation, and some kinetic parameters for monomer system studied were determined. The results show that terpolymerization was carried out through primary "complex" mechanism in the state of near binary copolymerization of A1 with D...A2 complex. Self-crosslinkable epoxyanhydride terpolymers synthesized easily undergo crosslinking by thermotreatment and by W-irradiationRzaev, Z.M.O. et al. | 1999
- 1103
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ARTICLES - Catalysis of the Cure Reaction of Bisphenol A Dicyanate. A DSC Study - The kinetics of the thermal polymerization of bisphenol A dicyanate catalyzed by transition metal acetyl acetonates was studied by dynamic DSC. For a given oxidation state of the metal ion, the catalytic efficiency measured in terms of the kinetically compensated activation parameter increased with decrease in stability of the complex. A linear relationship existed between activation energy and gel temperature. Activation energy decreased exponentially with increase in catalyst concentrationMathew, D. et al. | 1999
- 1115
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ARTICLES - Interaction of Metal Ions with Polypyrrole on Polyacrylic Acid Matrix - The oxidative matrix polymerization of pyrrole (Py) by Fe(III), Cu(II), Ni(II), Co(II), and Zn(II) in the presence of polyacrylic acid (PAA) was studied and water-soluble products along with insoluble products were obtained. The metal (Me) content of the soluble and insoluble products were determined by different methods. The possible structure of polymer-Me and polymer-polymer interaction is proposedUstamehmetoglu, B. et al. | 1999
- 1125
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ARTICLES - New Polymers of Carbonic Acid. XXV. Photoreactive Cholesteric Polycarbonates Derived from 2,5-Bis(4'-hydroxybenzylidene)cyclopentanone and Isosorbide - Binary and ternary cholesteric copolycarbonates were prepared from hydroquinone 4-hydroxybenzoate (mesogen), isosorbide (chiral component), and 2,5-bis(4'-hydroxybenzylidene)cyclopentanone (photoreactive building block). Synthesis and Characterization of AromaticSun, S.-J. et al. | 1999
- 1135
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ARTICLES - Polymers Derived from 5-Perfluoroalkylisophthalic Acid - A series of polyisophthalamides and polyisophthalates having perfluorinated side chains were prepared from 5-perfluoroalkylisophthaloyl dichlorides. The aromatic polyamides and polyarylates synthesized by the conventional low temperature solution polycondensation and the interfacial polycondensation, respectively, had the inherent viscosities of 0.19-1.28 dL-g-1 in yields of 65-100%. The effect of the incorporation of perfluoroalkyl groups into the aromatic polyamide or polyarylate backbones is discussedKajiyama, M. et al. | 1999
- 1143
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ARTICLES - Anionic Synthesis and Characterization of w-Carboaldehyde-Functionalized Polybutadienes and Polyisoprenes - The functionalization of poly(butadienyl)lithium and poly(isoprenyl)lithium with 4-morpholinecarboxaldehyde has been investigated. Dimeric products resulting from postfunctionalization, base-catalyzed aldol condensation are formed in 38-73% yields. Optimum conditions for quantitative aldehyde functionalization have been developedQuirk, R.P. et al. | 1999
- 1157
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ARTICLES - A Rapid-Injection NMR Study of the Effect of Lithium Alkoxides on the Butyllithium-Initiated Polymerization and Propagation of Styrene - In studies carried out in THF at -80(degree)C, lithium n-butoxide was found to speed up the initiation and to an even greater extent, the rate of propagation in the alkyllithium-initiated polymerization of styrene. Bulky alkoxides were found to slow down the rate of polymerization by slowing both initiation and propagation although initiation was decreased to a greater extent than propagation. Five equivalents of lithium tert-butoxide stopped the initiation completely under these reaction conditions when n-butyllithium was used as an initiatorOgle, C.A. et al. | 1999
- 1169
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ARTICLES - Synthesis and Properties of Novel Aromatic Polyhydrazides and Poly(amide-hydrazide)s Based on the Bis(ether benzoic acid)s from Hydroquinone and Substituted Hydroquinones - Polyhydrazides and poly(amide-hydrazide)s with the displayed general structures were prepared by the polycondensation of terephthalic dihydrazide, isophthalic dihydrazide, or p-aminobenzoyl hydrazide with the bis(ether benzoic acid)s or bis(ether benzoyl chloride)s derived from hydroquinone and its derivatives. The basic characterization of these novel polymers and the thermal cyclodehydration to the poly(1,3,4-oxadiazole)s and poly(amide-1,3,4-oxadiazole)s are investigatedHsiao, S.-H. et al. | 1999
- 1183
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ARTICLES - Soluble Poly(amide-imide)s Prepared by One-Pot Solution Condensation - A new one-pot procedure for imide-acid monomer synthesis and polymerization via triphenyl phosphite-activation is reported for four new poly(amide-imide)s. Isolation and purification of the diacid monomers was not necessary for formation of high molecular weight polymers as indicated by intrinsic viscosities of 0.64-1.04 dL-g determined in N,N-dimethylacetamide (DMAc). Polymers were obtained in good yield and gave transparent, tough filmsTullos, G.L. et al. | 1999
- 1189
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ARTICLES - Synthesis and Characterization of Novel Aromatic Polyimides from 4,4-Bis(p-aminophenoxymethyl)-1-cyclohexene - A new diamine (2) was synthesized from bis(hydroxymethyl)-1-cyclohexene and incorporated into aromatic polyimides. This group inhibits conjugation and coplanarity in the backbone, making the obtained polyimides more processable. Most polymers synthesized were soluble and had relatively high molecular weights. Utilization of pendant double bond for postpolymerization modifications was investigated, through epoxidation and reaction with bromineYagci, H. et al. | 1999
- 1199
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ARTICLES - Synthesis and Cationic Photopolymerization of Monomers Based on Nopol - A novel hybrid monomer, nopol ether epoxide (I) containing both epoxy and a 1-propenyl ether groups was prepared by using the sequence of reactions shown in the figure. Studies of the cationic photopolymerization of I showed that in contrast to model compounds, the rate of polymerization of the epoxy group has been accelerated while the rate of 1-propenyl ether has been depressed. A mechanism explaining these results is proposedCrivello, J.V. et al. | 1999
- 1211
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ARTICLES - Asymmetric Polymerization Via Cycloaddition Reactions - The novel optically active monomer 2-methoxy-4-(1-propenyl)phenyl 2(S)-N-phthaloyl-4-methylpentanoate was synthesized from the reaction of N-phthaloyl-L-leucine acid chloride was isoeugenol in high yield. This chiral monomer was reacted with bis(triazolinedione)s as difunctional monomers and gave only one diastereomeric product (de 100%), which was proved by 1H-NMR data. Thus, it can act as a difunctional monomer in which the second functionality is produced during the course of reaction. Therefore, it is an interesting chiral monomer for tandem Diels-Alder-ene polymerization reactionsMallakpour, S.E. et al. | 1999