Journal of Polymer Science Part A: Polymer Chemistry

Cover image for Journal of Polymer Science Part A: Polymer Chemistry

1 March 2002

Volume 40, Issue 5

Pages 633–729

  1. Articles

    1. Top of page
    2. Articles
    3. Erratum
    1. Synthesis of star-shaped copolymers with methyl methacrylate and n-butyl methacrylate by metal-catalyzed living radical polymerization: Block and random copolymer arms and microgel cores (pages 633–641)

      Kyung-Youl Baek, Masami Kamigaito and Mitsuo Sawamoto

      Article first published online: 10 JAN 2002 | DOI: 10.1002/pola.10145

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      Various star-shaped copolymers with methyl methacrylate (MMA) and n-butyl methacrylate (nBMA) were synthesized by Ru(II)-catalyzed living radical polymerization with (MMA)2[BOND]Cl/RuCl2(PPh3)3/Al(Oi-Pr)3 in toluene at 80 °C. These star copolymers consisted of arm chains with AB- and BA-type block copolymers or random copolymers of MMA and nBMA and microgel cores.

    2. Rare-earth-catalyzed alternating copolymerization of carbon monoxide with styrene (pages 642–649)

      Fanglian Yao, Chunjian Xu, Liandong Deng, Yun Bai, Jianhui Zhang and Jingwu Sun

      Article first published online: 9 JAN 2002 | DOI: 10.1002/pola.10147

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      With different kinds of rare-earth salts as catalysts, an alternating copolymer of carbon monoxide and styrene was obtained under various conditions, and the catalytic activity of neodymium acetate was comparatively higher. The structure of the styrene–carbon monoxide was investigated with IR spectra, 1H NMR, elemental analysis, and wide-angle X-ray diffraction.

    3. Free-radical copolymerization of 3-phthalimido-2-hydroxypropyl methacrylate with styrene: The determination of monomer reactivity ratios and thermal analysis studies (pages 650–658)

      M. Fatih Coşkun, Kadir Demirelli, Dilek Güzel and Mehmet Coşkun

      Article first published online: 10 JAN 2002 | DOI: 10.1002/pola.10140

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      Free-radical copolymerizations of styrene and phthalimido-2-hydroxypropyl methacrylate (PHPMA) were carried out at 60 °C in a 1,4-dioxane solution in the presence of 2,2′-azobisisobutyronitrile at low conversions (<15%). The monomer reactivity ratios r1 (PHPMA) and r2 (styrene) were determined with the linearized copolymerization equations of the Kelen–Tüdös and inverted Fineman–Ross methods and with the nonlinear relationship of the Mayo–Lewis method to be r1 = 1.41 and r2 = 0.24, r1 = 1.52 and r2 = 0.26, and r1 = 1.15 and r2 = 0.16, respectively. The monomer reactivity ratios and glass-transition temperatures of the copolymers as functions of the copolymer composition are discussed.

    4. Main-chain viologen polymers with organic counterions exhibiting thermotropic liquid-crystalline and fluorescent properties (pages 659–674)

      Pradip K. Bhowmik, Haesook Han, James J. Cebe, Ronald A. Burchett and Ananda M. Sarker

      Article first published online: 15 JAN 2002 | DOI: 10.1002/pola.10134

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      Several viologen polymers with bromide, tosylate, and triflimide as counterions were prepared by the Menshutkin reaction or metathesis reaction and characterized for their thermotropic liquid-crystalline properties with a number of experimental techniques. Each of them exhibited fluorescence property in either aqueous or methanol solution.

    5. Laser-induced decomposition of 2,2-dimethoxy-2-phenylacetophenone and benzoin in methyl methacrylate homopolymerization studied via matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (pages 675–681)

      Christopher Barner-Kowollik, Philipp Vana and Thomas P. Davis

      Article first published online: 15 JAN 2002 | DOI: 10.1002/pola.10150

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      Pulsed laser polymerization (PLP) experiments were performed on the bulk polymerization of methyl methacrylate (MMA) at −34 °C initiated by 2,2-dimethoxy-2-phenylacetophenone (DMPA) and benzoin. Analysis of the matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) spectra indicates that the two radical fragments generated upon pulsed laser irradiation show markedly different reactivity toward MMA: whereas the benzoyl fragment—common to both DMPA and benzoin—clearly participates in the initiation process, the acetal and benzyl alcohol fragments cannot be identified as end groups in the polymer. In addition, the MALDI-TOF spectra were analyzed to extract the propagation-rate coefficient, kp, of MMA at −34 °C.

    6. Synthesis and optical properties of soluble polyethers containing oligophenyl in the main chain and p-styrylbenzene side groups (pages 682–693)

      Ioakim K. Spiliopoulos and John A. Mikroyannidis

      Article first published online: 14 JAN 2002 | DOI: 10.1002/pola.10151

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      New soluble and photoluminescent polyethers were synthesized by a convenient synthetic route with pyrylium salts. Their glass-transition temperatures ranged from 68 to 153 °C. The photoluminescence spectra showed maxima at 393–398 nm in solution and 422–449 nm in thin films, indicating violet-blue emissions. The photoluminescence quantum yields in solution were up to 0.25. The polymers displayed both in concentrated solutions and in the solid state intramolecular or intermolecular interactions.

    7. Bulk free-radical photopolymerizations of 1-vinyl-2-pyrrolidinone and its derivatives (pages 694–706)

      L. A. White, C. E. Hoyle, S. Jonsson and L. J. Mathias

      Article first published online: 17 JAN 2002 | DOI: 10.1002/pola.10142

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      The free-radical bulk photopolymerization of 1-vinyl-2-pyrrolidinone (NVP) with an NVP-based crosslinker, 1,6-(bis-3-vinyl-2-pyrrolidinonyl)hexane (BNVP), and an NVP-based comonomer, 3-hexyl-1-vinyl-2-pyrrolidinone (VHP), was investigated. The enthalpies of polymerization were determined for NVP and VHP to be 30.8 and 35.7 kJ/mol, respectively. The rates of polymerization were determined for NVP/VHP and NVP/BNVP systems at various temperatures. The overall rates of polymerization of these 3-alkylated-2-pyrrolidone derivatives increased with substitution onto the pyrrolidinone ring.

    8. Synthesis and properties of soluble and light-colored poly(amide-imide-imide)s on the basis of tetraimide-dicarboxylic acid condensed from 4,4′-oxydiphthalic anhydride, 2,2-bis[4-(4-aminophenoxy)phenyl]propane, and m-aminobenzoic acid, and various aromatic diamines (pages 707–718)

      Chin-Ping Yang, Ruei-Shin Chen and Chi-Shu Wei

      Article first published online: 17 JAN 2002 | DOI: 10.1002/pola.10153

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      A new type of tetraimide-dicarboxylic acid was synthesized from m-aminobenzoic acid, 4,4′-oxydiphthalic anhydride, and 2,2-bis[4-(4-aminophenoxy)phenyl]propane at a 2:2:1 molar ratio. A series of soluble, light-colored poly(amide-imide-imide)s was prepared by triphenyl phosphite-activated polycondensation from the diacid with various aromatic diamines. All films cast from dimethylacetamide had cutoff wavelengths shorter than 390 nm and b* values between 25.26 and 43.61, which are much lighter in color than alternating trimellitimide series. All the polymers were readily soluble in a variety of organic solvents and in less polar solvents. Polymers afforded tough, transparent, and flexible films that were characterized by good mechanical properties together with excellent thermal stability.

    9. Method for grafting poly(acrylic acid) onto nylon 6,6 using amine end groups on nylon surface (pages 719–728)

      Finn Andrew Tobiesen and Stephen Michielsen

      Article first published online: 16 JAN 2002 | DOI: 10.1002/pola.10149

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      Poly(acrylic acid) was grafted to the amine ends on the surface of nylon 6,6 using N-hydroxy-succinimide and 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride. X-ray photoelectron spectroscopy (XPS) was used to determine the efficiency of grafting for various reaction conditions.

  2. Erratum

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    2. Articles
    3. Erratum
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