Journal of Polymer Science Part A: Polymer Chemistry

Cover image for Vol. 52 Issue 4

15 February 2014

Volume 52, Issue 4

Pages i–iv, 435–589

  1. Cover Image

    1. Top of page
    2. Cover Image
    3. Highlights
    4. Rapid Communications
    5. Articles
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      Cover Image, Volume 52, Issue 4 (pages i–ii)

      Article first published online: 3 JAN 2014 | DOI: 10.1002/pola.27079

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      In the study by Serife O. Hacioglu, Sinem Toksabay, Merve Sendur, and Levent Toppare on page 537, benzotriazole and triphenylamine bearing random copolymers are synthesized. Electrochemical and spectroelectrochemical analyses of the copolymers are performed and the results are highlighted. Promising properties of these materials make them good candidates for electrochromic devices and organic solar cells.

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      Cover Image, Volume 52, Issue 4 (pages iii–iv)

      Article first published online: 3 JAN 2014 | DOI: 10.1002/pola.27080

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      Metallocene-catalyzed ethylene polymerization on customized porous polyurethane microspheres having a defined porosity and morphology is introduced by Robert Dorresteijn, Sven Nietzel, Daejune Joe, Yi Gerkmann, Gerhard Fink, Markus Klapper, and Klaus Müllen on page 450. Due to the porosity, the metallocene catalyst is readily immobilized throughout the polyurethane support. Various optical techniques show complete fragmentation of the support in the final well-defined polyethylene particles.

  2. Highlights

    1. Top of page
    2. Cover Image
    3. Highlights
    4. Rapid Communications
    5. Articles
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      Sensitive microgels as model colloids and microcapsules (pages 435–449)

      Sebastian Seiffert

      Article first published online: 28 NOV 2013 | DOI: 10.1002/pola.27024

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      Polymer microgels that react to external stimulation either by swelling and deswelling or by reversible crosslinking can serve a variety of needs in fundamental research and practical applications. Achievements in the use of such microgels are highlighted, both as model colloids to study relations between structure, dynamics, and properties of complex soft matter and as microcapsules to host and release functional additives.

  3. Rapid Communications

    1. Top of page
    2. Cover Image
    3. Highlights
    4. Rapid Communications
    5. Articles
    1. You have free access to this content
      Metallocene supported on porous and nonporous polyurethane particles for ethylene polymerization (pages 450–459)

      Robert Dorresteijn, Sven Nietzel, Daejune Joe, Yi Gerkmann, Gerhard Fink, Markus Klapper and Klaus Müllen

      Article first published online: 27 NOV 2013 | DOI: 10.1002/pola.27026

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      Micrometer-sized spherical polyurethane supports with a narrow size distribution and adjustable porosity were synthesized via the nonaqueous emulsion polymerization technique. They can be directly used in metallocene-catalyzed olefin polymerization, preventing complex aggregation procedures that are typical for other organic and inorganic supports based on silica or latex particles. The reasonable catalytic activity and study of fragmentation behavior, using various optical techniques, demonstrates the potential applicability of the supports.

  4. Articles

    1. Top of page
    2. Cover Image
    3. Highlights
    4. Rapid Communications
    5. Articles
    1. Effect of permodified β-cyclodextrin on the photophysical properties of poly[2,7-(9,9-dioctylfluorene)-alt-(5,5′-bithiophene)] main chain polyrotaxanes (pages 460–471)

      Aurica Farcas, Giulia Tregnago, Ana-Maria Resmerita, Sarah Taleb Dehkordi, Sophie Cantin, Fabrice Goubard, Pierre-Henri Aubert and Franco Cacialli

      Article first published online: 3 DEC 2013 | DOI: 10.1002/pola.27034

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      Encapsulations of bithiophene units from poly[2,7-(9,9-dioctylfluorene)-alt-(5,5′-bithiophene)] copolymer chains into persilylated or permethylated β-cyclodextrin cavities leads to distinct improvements in the solubility, transparency, and film forming ability. The photoluminescence exhibits a well-defined vibronic structure with a predominance of the 0-0 transition and a fluorescence lifetime that follows a mono-exponential decay. The increased height of the rod-like structures may indicate a higher tendency of the polyrotaxane chains to organize into fibers in the solid states.

    2. Synthesis and curing kinetics of cardanol-based curing agents for epoxy resin by in situ depolymerization of paraformaldehyde (pages 472–480)

      Yuan Liu, Juan Wang and Shiai Xu

      Article first published online: 26 NOV 2013 | DOI: 10.1002/pola.27018

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      Cardanol is a renewable natural resource that seems to be a potential alternative for petroleum-based chemicals. Three different novel cardanol-based phenalkamines are successfully prepared by Mannich reaction. The relations between the properties of cured materials and the structure of phenalkamines are investigated using differential scanning calorimetry, thermogravimetric analysis, and the mechanical properties test. Cardanol-based curing agents containing flexible chains improve the toughness of cured materials.

    3. Reactive regioregular oligothiophenes and polythiophenes with Zincke salt structure: Synthesis, reactions, and chemical properties (pages 481–492)

      Isao Yamaguchi and Yukako Tsuse

      Article first published online: 22 NOV 2013 | DOI: 10.1002/pola.27019

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      Polythiophenes with reactive Zincke salt structure, P4ThPy+DNP(Cl) and P5ThPy+DNP(Cl), were synthesized by the oxidation polymerization of oligothiophenes, such as 3′-(4-N-(2,4-dinitrophenyl)pyridinium chloride)−2,2′:5′,2“;5“,2“′-quarterthiophene (4ThPy+DNP(Cl)) and 4“-(4-N-(2,4-dinitrophenyl)pyridinium chloride)−2,2′;5',2“;5“,2′′′;5′′′,2′′′′-quinquethiophene (5ThPy+DNP(Cl)), with iron(III) chloride. The reaction of P5ThPy+DNP(Cl) with R-NH2 [R = n-hexyl (Hex) and phenyl (Ph)] substituted the 2,4-dinitrophenyl group into the R group with the elimination of 2,4-dinitroaniline to yield P5ThPy+R(Cl).

    4. Highly efficient metal-free organic catalysts to design new Environmentally-friendly starch-based blends (pages 493–503)

      Cedric Samuel, Yvan Chalamet, Fernande Boisson, Jean-Charles Majesté, Frédéric Becquart and Etienne Fleury

      Article first published online: 22 NOV 2013 | DOI: 10.1002/pola.27022

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      A robust and green one-step process was used, in the presence of low amount of metal-free organic catalysts, to prepare blends of poly(trimethylene carbonate) filled with surface-modified granular starch (TBD and phosphazene superbases P1-t-Oct, P2-t-bu, and P4-t-bu).

    5. Branched polystyrene with high reflex index synthesized from selenium-mediated polymerization (pages 504–510)

      Jinjie Lu, Nianchen Zhou, Xiangqiang Pan, Jian Zhu and Xiulin Zhu

      Article first published online: 25 NOV 2013 | DOI: 10.1002/pola.27023

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      Selenium-containing hyperbranched polystyrene, which was synthesized by selenium-mediated controlled free radical polymerization, shows potential application as high refractive material.

    6. Synthesis, photopolymerization, and adhesive properties of hydrolytically stable phosphonic acid-containing (meth)acrylamides (pages 511–522)

      Ayse Altin, Burcin Akgun, Zeynep Sarayli Bilgici, Sebnem Begum Turker and Duygu Avci

      Article first published online: 28 NOV 2013 | DOI: 10.1002/pola.27025

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      Three (meth)acrylamide monomers containing phosphonic acid group were synthesized. Some of their properties were compared with a bisphosphonic acid-containing methacrylamide to evaluate their potential to be used in dental adhesives and to better understand the relation between the monomer structure and polymerization reactivity/adhesion properties. These (meth)acrylamides exhibit great potential to be used as self-etching adhesive monomers due to their etching ability, hydrolytic stability, and co-polymerizability with dental monomers such as HEMA.

    7. Transparent room temperature cured elastomers based on bisphenol A (pages 523–526)

      Mollie B. Schear and Matthew Laskoski

      Article first published online: 1 DEC 2013 | DOI: 10.1002/pola.27027

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      The synthesis and room temperature polymerization of a bisphenol A based divinyl resin is demonstrated. The cured resin exhibited good thermo-oxidative stability and mechanical properties.

    8. Synthesis and characterization of polyamine-based cyclophosphazene hybrid microspheres (pages 527–536)

      Jens Köhler, Sebastian Kühl, Helmut Keul, Martin Möller and Andrij Pich

      Article first published online: 1 DEC 2013 | DOI: 10.1002/pola.27028

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      Based on HCCP and bPEI crosslinked cyclomatrix polyphosphazene poly(HCCP-co-bPEI) microspheres are prepared by precipitation polymerization in acetonitrile. By adjusting the reagent ratio in the feed an effective control of chlorine substitution, chemical composition, and thermal properties, as well as particle size and morphology, is achieved. The presence of free amine groups on the surface offers the possibility of further functionalization or for the use as flame-retardant finish for fibers and fabrics.

    9. Synthesis and electrochromic properties of triphenylamine containing copolymers: Effect of π-bridge on electrochemical properties (pages 537–544)

      Serife O. Hacioglu, Sinem Toksabay, Merve Sendur and Levent Toppare

      Article first published online: 6 DEC 2013 | DOI: 10.1002/pola.27030

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      Benzotriazole and triphenylamine bearing random copolymers are synthesized. Electrochemical and spectroelectrochemical properties of the P1, P2, and P3 are performed, and the results are highlighted. Promising properties of these materials make them good candidates for electrochromic devices and organic solar cells.

    10. Polyolefin soluble polyisobutylene oligomer-bound metallophthalocyanine and azo dye additives (pages 545–551)

      Nilusha Priyadarshani, Chase W. Benzine, Benjamin Cassidy, Jakkrit Suriboot, Peng Liu, Hung-Jue Sue and David E. Bergbreiter

      Article first published online: 30 NOV 2013 | DOI: 10.1002/pola.27031

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      Metallophthalocyanine and azo dyes that are otherwise polar materials insoluble in hydrocarbons readily dissolve in hydrocarbons including hot polyethylene and propylene melts when they are covalently modified with polyisobutylene oligomers. Cooling the polymer melts produces solid products that contain a uniform dispersion of dyes with crystallinity and thermal properties that are largely unchanged by dye incorporation.

    11. Synthesis and characterization of blue-light emissive carbazole containing perfluorocyclobutyl arylene ether polymers (pages 552–560)

      Kaizheng Zhu, Benjamin Lund, Rachel Stern, Stephen M. Budy, Dennis W. Smith Jr. and Scott T. Iacono

      Article first published online: 27 NOV 2013 | DOI: 10.1002/pola.27032

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      From commercial carbazole feedstock, a series of arylene trifluorovinyl ether monomers were synthesized containing N-aryl/alkyl moieties. Thermal, solvent-free chain extension via [2 + 2] cyclodimerization of the terminal perfluorolefins afforded film-forming, optically perfluorocyclobutyl arylene ether polymers. Optical and electrochemical studies of the blue emissive systems revealed the main-chain carbazole units exhibit inherent isolated chromophore behavior in a predominantly non-conjugated linear polymer system and are suitable as new candidates for hole-transport materials.

    12. A novel route for preparation of multifunctional polymeric nanocarriers for stimuli-triggered drug release (pages 561–571)

      Chih-Yu Kuo, Yu-Cheng Wang, Chia-Fen Lee and Wen-Yen Chiu

      Article first published online: 1 DEC 2013 | DOI: 10.1002/pola.27033

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      PNIPAAm-based nanocarriers were prepared via two different types of drug-loading processes with the temperature induced self-assembling method. The modeling drug, Rhodamine 6G (R6G), had not only the fluorescent property but also the ability to maintain the spherical structure of the nanocarriers without crosslinkers. By controlling the pH value and temperature, the different stimuli-triggered release mechanisms were evaluated. The pH- and thermoresponsive nanocarriers have potential to be applied in targeting therapy for various kinds of diseases.

    13. Multifunctional linear methacrylate copolymer polyenes having pendant vinyl groups: Synthesis and photoinduced thiol–ene crosslinking polyaddition (pages 572–581)

      So Young An, Ji Won Hwang, Kyung Nam Kim, Hyun Wook Jung, Seung Man Noh and Jung Kwon Oh

      Article first published online: 10 DEC 2013 | DOI: 10.1002/pola.27035

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      UV-induced thiol–ene crosslinked films composed of linear methacrylate copolymers having pendant enes (MCPenes) are reported. Controlled radical polymerization to synthesize well-controlled pendant hydroxyl-containing copolymers (MCPOHs) was combined with the following facile carbodiimide coupling of the formed MCPOHs with enes to allow for the synthesis of well-controlled MCPenes with narrow molecular weight distribution. Under UV irradiation, the resulting MCPenes undergo thiol–ene polyaddition reactions with polythiols to form crosslinked films with a uniform network.

    14. Thiol-responsive micelles based on nonionic gemini surfactants with a cystine disulfide spacer (pages 582–589)

      Hyun-Chul Kim, Eunjoo Kim, Se Guen Lee, Sung Jun Lee, Hyunmin Kim and Sang Won Jeong

      Article first published online: 3 DEC 2013 | DOI: 10.1002/pola.27036

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      Novel non-ionic gemini surfactants with a cystine disulfide spacer were synthesized for the preparation of thiol-responsive micelles. The release of a hydrophobic drug from the gemini surfactant micelles was accelerated with increasing concentration of the reducing agent, glutathione (GSH); however, the release profiles in the presence of reduced GSH (as well as glutathione disulfide (GSSG)) were similar to those of the control experiment.

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