Journal of Polymer Science Part A: Polymer Chemistry

Cover image for Vol. 55 Issue 21

Impact Factor: 3.113

ISI Journal Citation Reports © Ranking: 2014: 18/82 (Polymer Science)

Online ISSN: 1099-0518

Associated Title(s): Journal of Polymer Science Part B: Polymer Physics

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  1. Molecular sieves supported recyclable catalyst for atom transfer radical polymerization using hydration approach

    Ravi Aggarwal and Durairaj Baskaran

    Version of Record online: 21 SEP 2017 | DOI: 10.1002/pola.28772

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    Catalyst contamination of ATRP polymers is circumvented using hydration mediated supported aqueous-phase catalysis. Zeolite is hydrated to suspend the catalyst complex with ligand and used for the polymerization of benzyl methacrylate at room temperature in anisole. The diffusion dynamics of hydrated water molecules of zeolite in nonaqueous polymerization medium help interfacial fast oxidation-reduction catalytic cycles to promote polymerization at the interface showing zero-order kinetics and resulting catalyst contamination free polymer generation in anisole.

  2. Synthesis of star-shaped poly(n-butyl acrylate) oligomers with coumarin end groups and their networks for a UV-tunable viscoelastic material

    Satoshi Honda, Nobuaki Tanaka and Taro Toyota

    Version of Record online: 19 SEP 2017 | DOI: 10.1002/pola.28777

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    Solvent-free isothermal tuning of viscoelasticity of polymer materials is important for an emerging photochemical molding technology. In this study we have synthesized a four-armed star-shaped poly(butyl acrylate, BA) oligomer having four coumarin end groups and its network. Moreover, we have achieved tuning of viscoelasticity with the network material by repetitive UV365 and UV254 irradiations isothermally under a solvent-free condition.

  3. Mannose-based graft polyesters with tunable binding affinity to concanavalin A

    Yixuan Xie, Chao Peng, Yunyi Gao, Xiaohong Liu, Tianbo Liu and Abraham Joy

    Version of Record online: 17 SEP 2017 | DOI: 10.1002/pola.28776

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    Mannose-based graft polyesters with different mannose pendant units were synthesized. The binding behavior of mannose grafted polyesters with Con A was investigated by turbidimetry and isothermal titration calorimetry studies. It was found that graft polyester with 20 mannose pendant units showed 10× higher binding affinity compared with the polyester with a single mannose unit.

  4. Mitigating chain-transfer and enhancing the thermal stability of co-based olefin polymerization catalysts through sterically demanding ligands

    Nolan E. Mitchell, W. Curtis Anderson Jr. and Brian K. Long

    Version of Record online: 17 SEP 2017 | DOI: 10.1002/pola.28783

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    Sterically demanding Fe- and Co-based olefin polymerization catalysts were synthesized and evaluated for ethylene polymerization. The Co-based catalyst 2-Co was found to polymerize ethylene with no detectable chain-transfer to aluminum events and displayed near perfect thermal stability up to 80 and 90 °C. These observations are attributed to the extreme steric demand imposed by the ligand which mitigates catalyst transfer, deactivation, and decomposition reactions.

  5. Effect of thiophene spacers in benzodithiophene-based polymers for organic electronics

    Taniya M. S. K. Pathiranage, Harsha D. Magurudeniya, Michael C. Biewer and Mihaela C. Stefan

    Version of Record online: 15 SEP 2017 | DOI: 10.1002/pola.28781

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    Poly(4,8-bis(5-dodecylthiophen-2-yl)-2,6-di(thiophen-2-yl)benzo[1,2-b:4,5-b′]dithiophene) [poly(Th-bDTBDT-Th)] has been synthesized by Stille coupling polymerization. The properties of poly(Th-bDTBDT-Th) were studied and compared to the previously reported poly{4,8-bis(5-dodecylthiophene-2-yl)benzo[1,2-b:4,5-b′]dithiophene} [poly(bDTBDT)] to evaluate the optoelectronic properties with respect to the effect of placing thiophene spacer units between functionalized benzodithiophene. The field-effect mobility and the vertical charge carrier mobility of poly(Th-bDTBDT-Th) was improved by one order of magnitude in the presence of thiophene spacers. Both UV–vis and thin film X-ray diffraction studies indicated high crystallinity and enhanced packing in poly(Th-bDTBDT-Th).

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