Journal of Polymer Science Part A: Polymer Chemistry

Cover image for Vol. 53 Issue 2

Early View (Online Version of Record published before inclusion in an issue)

Impact Factor: 3.245

ISI Journal Citation Reports © Ranking: 2013: 14/82 (Polymer Science)

Online ISSN: 1099-0518

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

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  1. 1 - 34
  1. Articles

    1. New acid/base salts as co-catalysts for the organocatalyzed ring opening polymerization of lactide

      Yong Miao, Nicholas Stanley, Audrey Favrelle, Till Bousquet, Marc Bria, André Mortreux and Philippe Zinck

      Article first published online: 17 DEC 2014 | DOI: 10.1002/pola.27488

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      DBU/BNPH and DMAP/CSA conjugates are used in combination with a base such as DBU or DMAP for the ring-opening polymerization of lactide. The polymerization is well controlled for all combinations in mild conditions (DM < 1.1), and the influence of acid/base equilibria involving two different bases on the catalysis is discussed. The presence of the salts leads, depending on the combination, to narrower molecular weight distributions, higher activities and higher initiation efficiency, and prevents transesterification.

    2. Ionic conductivity probed in main chain liquid crystalline azobenzene polyesters

      Chinmay G. Nardele, Vishal M. Dhavale, K. Sreekumar and S. K. Asha

      Article first published online: 16 DEC 2014 | DOI: 10.1002/pola.27484

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      Thermal and optical modulation of ionic conductivity was demonstrated in the main chain azo liquid crystalline polyesters. Maximum ionic conductivity was observed in the range of 10−5 S cm−1 at room temperature (25 °C), which increased to 10−4 S cm−1 above 65 °C.

  2. Original Articles

    1. Fluorene based donor-acceptor polymer electrets for nonvolatile organic transistor memory device applications

      Lei Dong, Han-Sheng Sun, Jau-Tzeng Wang, Wen-Ya Lee and Wen-Chang Chen

      Article first published online: 16 DEC 2014 | DOI: 10.1002/pola.27483

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      The relationship between memory behavior and acceptor structures are investigated, providing new insight for molecular design of nonvolatile memories. Four fluorine-based donor-acceptor polyimides act as charge storage layers for transistor-type memory devices. The various memory characteristics including EORM, semi-flash, and flash types can be tuned by changing acceptor moieties. Among these polymer electrets, PI(BAPF-6FDA) has largest memory window (77 V) and excellent operation stability (more than 100 cycles).

    2. Core-shell structured poly(glycidyl methacrylate)/BaTiO3 nanocomposites prepared by surface-initiated atom transfer radical polymerization: A novel material for high energy density dielectric storage

      Muhammad Ejaz, Venkata S. Puli, Ravinder Elupula, Shiva Adireddy, Brian C. Riggs, Douglas B. Chrisey and Scott M. Grayson

      Article first published online: 16 DEC 2014 | DOI: 10.1002/pola.27485

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      The surface-initiated atom transfer radical polymerization has been applied to graft polyglycidyl methacrylates (PGMA) on the surface of BaTiO3 nanoparticles in two steps to form core-shell structured BaTiO3-PGMA nanocomposites. BaTiO3 are covered with a dense uniform film of grafted PGMA. The resultant BaTiO3-PGMA nanocomposites show an improved dielectric constant, a high breakdown field strength and high-energy storage density. Improved dielectric and electrical properties of these nanocomposites are attributed to good nanoparticles dispersion and enhanced interfacial polarization.

    3. Hybrid acrylate-oxetane photopolymerizable systems

      James V. Crivello

      Article first published online: 16 DEC 2014 | DOI: 10.1002/pola.27480

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      Hybrid interpenetrating network polymers were prepared by the concurrent free radical and cationic photopolymerizations of mixtures of multifunctional acrylate and oxetane monomers. The use of highly reactive “kick-started” oxetanes in these systems provides network films that are homogeneous, hard, colorless, and transparent.

  3. Rapid Communication

    1. Highly sensitive fluorescent polyamide for detection of Hg2+, Hg+, Fe3+, and Fe2+ ions

      Yun Yu, Xinjian Cheng, Honglin Liu, Shuangying Gu, Zhuoni Jiang, Hui Huang and Jiansheng Lian

      Article first published online: 16 DEC 2014 | DOI: 10.1002/pola.27489

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      A chemosensor derived from R6G was prepared and introduced to polyamide (PA). The as-prepared PA showed high sensitivity to some heavy metal ions. Both the color and the fluorescence changed immediately after the addition of heavy metal ions.

  4. Original Articles

    1. Synthesis and crystallization of star-shaped photocleavable poly(ε-caprolactone)s

      Ajay S. Kasegaonkar, Haitham Barqawi and Wolfgang H. Binder

      Article first published online: 16 DEC 2014 | DOI: 10.1002/pola.27486

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      A multivalent photocleavable initiator for the polymerization of lactones yielding photocleavable three arm-star poly(ε-caprolactone)s is reported, in turn enabling to change the star-architecture of the synthesized polymer by irradiation with UV light. Besides 1H NMR, HPLC, and ESI-TOF-MS, which clearly support the structure of the synthesized photocleavable star-shaped poly(ε-caprolactone), DSC studies prove the successful removal of the topological constraint in the star-shaped poly(ε-caprolactone) polymers, in turn enhancing the crystallinity of the irradiated polymer.

    2. Polymer/clay nanocomposites through multiple hydrogen-bonding interactions

      Muhammed Aydin, Tamer Uyar, Mehmet Atilla Tasdelen and Yusuf Yagci

      Article first published online: 16 DEC 2014 | DOI: 10.1002/pola.27487

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      Polymer/clay nanocomposites are successfully prepared by multiple hydrogen-bonding interactions of the intercalated 2-ureido-4[1H]pyrimidinone (UPy)-functionalized organoclay and UPy-end functionalized polymers. The self-complimentary quadruple hydrogen bonding could gradually push the layers apart, leading to delamination of clay tactoids and lead to formation of nanocomposites. Spectroscopic and microscopic investigations reveal a mixed morphology with partial intercalation/exfoliation, which depends on the concentration of clay. The TGA and DSC results confirm that the thermal stability of the nanocomposites higher than pristine polymers.

    3. Naphthalimide-phthalimide derivative based photoinitiating systems for polymerization reactions under blue lights

      Pu Xiao, Frédéric Dumur, Jing Zhang, Bernadette Graff, Didier Gigmes, Jean Pierre Fouassier and Jacques Lalevée

      Article first published online: 16 DEC 2014 | DOI: 10.1002/pola.27490

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      Amino-functional-group-substituted naphthalimide-phthalimide derivative (NDPD) can be incorporated in the photoinitiating systems with various additives to initiate both the cationic polymerization of epoxides and/or the radical polymerization of acrylates upon exposure to blue lights. The photobleaching property of the NDPD could endow the related formulations with potential applications in the manufacture of colorless coatings.

    4. Investigations of the reactivity of “kick-started” oxetanes in photoinitiated cationic polymerization

      James V. Crivello

      Article first published online: 15 DEC 2014 | DOI: 10.1002/pola.27479

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      The ability of certain alkylated epoxides to accelerate the photoinitiated cationic ringopening polymerizations of oxetane monomers by substantially reducing or eliminating the induction period altogether has been termed “kick-starting.” Oxetane systems that have been “kick-started” are shown to be suitable for use in applications in which high-speed, UV-induced crosslinking photopolymerizations are carried out.

  5. Articles

    1. Blue LED light-sensitive benzo pyrazolo (or imidazo) isoquinolinone derivatives in high-performance photoinitiating systems for polymerization reactions

      Pu Xiao, Frédéric Dumur, Bernadette Graff, Jing Zhang, Fabrice Morlet-Savary, Didier Gigmes, Jean Pierre Fouassier and Jacques Lalevée

      Article first published online: 10 DEC 2014 | DOI: 10.1002/pola.27477

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      The substituent on the chemical structures of isoquinolinone-derivatives plays a significant role in their photoinitiation ability for various photopolymerization. These structures can produce reactive species (i.e. radicals and cations) to initiate the free radical polymerization of acrylates, the cationic polymerization of epoxides, the thiol-ene polymerization of trifunctional thiol/divinylether blends, and the synthesis of an epoxide/acrylate-based interpenetrated polymer network upon exposure to soft polychromatic visible lights, blue laser diodes, or blue LED lights.

    2. Surface polyion complex gel with poly(vinylphosphonic acid) and poly(N-vinylamide)s

      Hiroharu Ajiro, Kazuya Takemura and Mitsuru Akashi

      Article first published online: 8 DEC 2014 | DOI: 10.1002/pola.27476

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      The surface polyion complex gel (sPIC gel) was designed using N-vinylamides and vinyl phosphonic acid. The swelling ratio of the sPIC gel was varied between 14 and 25, while the polyion complex gel ranged between 2 and 5. The anionic compounds were used for observing releasing behavior from sPIC gels.

    3. Self-assembly of a triblock terpolymer mediated by hydrogen-bonded complexes

      Claire Guerlain, Sandie Piogé, Christophe Detrembleur, Charles-André Fustin and Jean-François Gohy

      Article first published online: 2 DEC 2014 | DOI: 10.1002/pola.27471

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      A poly(methyl methacrylate)-block-poly(4-vinylpyridine)-block-polystyrene (PMMA-b-P4VP-b-PS) triblock terpolymer is synthesized by atom transfer radical polymerization and further mixed with PAA in organic solvents. The self-assembly behavior of this system is compared with the one of a mixture of polystyrene-block-poly(4-vinylpyridine) (PS-b-P4VP) and poly(methyl methacrylate)-block-poly(methacrylic acid) (PMMA-b-PMAA). Micelles with a core made of P4VP/P(M)AA hydrogen-bonded complexes core surrounded by PS and PMMA coronal chains are obtained in both cases.

    4. Investigation of Mizoroki-Heck coupling polymerization as a catalyst-transfer condensation polymerization for synthesis of poly(p-phenylenevinylene)

      Masataka Nojima, Ryosuke Saito, Yoshihiro Ohta and Tsutomu Yokozawa

      Article first published online: 2 DEC 2014 | DOI: 10.1002/pola.27472

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      The feasibility of catalyst-transfer Mizoroki-Heck coupling polymerization of phenylenevinylene type monomers was investigated for the synthesis of well-defined poly(phenylenevinylene) (PPV). However, the molecular weight distribution was broad, and the MALDI-TOF mass spectra showed the peaks of polymers bearing no initiator unit at the chain end. The occurrence of step-growth polymerization may be interpreted in terms of low coordination ability of H-Pd(II)-X(tBu3P) to PPV π face, formed in the catalytic cycle of the Mizoroki-Heck coupling reaction.

    5. Experimental and computational studies of ring-opening polymerization of ethylene brassylate macrolactone and copolymerization with ε-caprolactone and TBD-guanidine organic catalyst

      Ana Pascual, Haritz Sardón, Fernando Ruipérez, Raquel Gracia, Pallavi Sudam, Antonio Veloso and David Mecerreyes

      Article first published online: 1 DEC 2014 | DOI: 10.1002/pola.27473

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      Innovative poly(ethylene brassylate) aliphatic polyester was synthesized by organocatalyzed ROP of a cheap and renewable macrolactone. TBD-guanidine superbase was an efficient catalyst for the bulk ROP of ethylene brassylate reaching full conversions in minutes. Experimental and complementary computational studies revealed that TBD can have a dual role acting both as catalyst and initiator for the polymerization. Interestingly, semicrystalline poly(ethylene brassylate-co-ε-caprolactone) random copolyesters showed melting temperatures ranging from 40 to 70 °C.

    6. DFT mechanistic study of the H2-assisted chain transfer copolymerization of propylene and p-methylstyrene catalyzed by zirconocene complex

      Cheng-Gen Zhang, Shu-Yuan Yu, Liaoyun Zhang, Huayi Li and Zhi-Xiang Wang

      Article first published online: 1 DEC 2014 | DOI: 10.1002/pola.27478

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      DFT calculations have been performed to understand the mechanism of H2-assisted chain transfer strategy to functionalize polypropylene polymers with p-methylstyrene (pMS). The pMS insertion results in much higher barriers for subsequent either propylene or pMS insertion, which causes deactivation of the catalytic system. Small H2 can react with the metal intermediate containing pMS facilely, which displaces copolymers and regenerates active catalyst species to continue copolymerization.

    7. New electroactive and electrochromic aromatic polyamides with ether-linked bis(triphenylamine) units

      Sheng-Huei Hsiao and Shou-Lun Cheng

      Article first published online: 25 NOV 2014 | DOI: 10.1002/pola.27465

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      A series of new electroactive aromatic polyamides bearing ether-linked bis(triphenylamine) units were readily prepared from N,N-di(4-aminophenyl)-N′,N′-diphenyl-4,4′-oxydianiline and various aromatic dicarboxylic acids by the phosphorylation polyamidation technique. The polyamides exhibit good solubility in many organic solvents and can be solution-cast into flexible and strong films with high thermal stability. They show well-defined and reversible redox waves during oxidative scanning, with a strong color change from colorless neutral form to green and purple oxidized forms.

    8. Synthesis of highly dispersed, block copolymer-grafted TiO2 nanoparticles within neat block copolymer films

      Shimelis T. Hailu, Saumil Samant, Christopher Grabowski, Michael Durstock, Alamgir Karim and Dharmaraj Raghavan

      Article first published online: 24 NOV 2014 | DOI: 10.1002/pola.27460

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      A comparative dispersion study of PMMA-PS-g-nps showed NPs to be dispersed well in PMMA-PS bcp and PMMA matrix, but strongly aggregated in PS. Pristine NPs aggregate in the bcp matrix. These results strongly suggest that dispersion of NPs in bcp is facilitated by identical bcp end-grafted “ligand” interactions on NPs. In nanocomposite films, the relatively large bcp-g-nps are preferentially sequestered in ordered domains with ligands spanning both the PS and PMMA domains.

    9. Synthesis of diallyl-containing polyimide and the effect of allyl groups on properties

      Ching Hsuan Lin, Tung I. Wong, Meng Wei Wang, Hou Chien Chang and Tzong Yuan Juang

      Article first published online: 24 NOV 2014 | DOI: 10.1002/pola.27459

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      Diallyl-containing soluble polyimide was prepared and transferred it into a thermosetting polyimide via thermal treatment at 300 °C. The amounts of allyl group on Tg, coefficient of thermal expansion, and thermal stability of thermosetting polyimides were discussed by comparing previous data. The experimental data show that thermal properties and dimensional stability of thermosetting polyimides increase with the amounts of cured allyl moieties.

    10. Synthesis and characterization of highly transparent and hydrophobic fluorinated polyimides derived from perfluorodecylthio substituted diamine monomers

      Pradip Kumar Tapaswi, Myeon-Cheon Choi, Saravanan Nagappan and Chang-Sik Ha

      Article first published online: 24 NOV 2014 | DOI: 10.1002/pola.27461

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      Two new perfluorodecylthio substituted aromatic diamines, namely 2,4-diamino-1-(1H,1H,2H,2H-perfluorodecathio)benzene (DAPFB) and 2,2'-bis((1H,1H,2H,2H-perfluorodecyl)thio)[1,1'-biphenyl]4,4'-diamine (BPFBD) were synthesized and polycondensed with 4,4′-(hexafluoroisopropylidene)diphthalic anhydride (6FDA) to produce two new perfluorinated polyimides (PI2 and PI4). A comparative investigation between the perfluorinated PIs (PI2 and PI4) and analogs nonperfluorinated PIs (PI1 and PI3) revealed that PI2 and PI4 exhibited higher solubility, optical transparency, and hydrophobicity but lower moisture absorption, dielectric constant, and thermomechanical properties.

    11. Benzotriazole and benzodithiophene containing medium band gap polymer for bulk heterojunction polymer solar cell applications

      Hande Unay, Naime A. Unlu, Gonul Hizalan, Serife O. Hacioglu, Dilber Esra Yildiz, Levent Toppare and Ali Cirpan

      Article first published online: 24 NOV 2014 | DOI: 10.1002/pola.27467

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      An alternating medium band gap copolymer based on benzotriazole and benzodithiophene unit was synthesized. Photovoltaic properties of the polymer were investigated by conventional device configuration and OSC based on the polymer: PC71BM showed the best PCE of 3.60% with a Voc of 0.67 V, a Jsc of 8.95 mA/cm2, and a FF of 60%. The hole mobility of polymer:PC71BM (1:1, w/w) blend reached up to 7.46 × 10−3 cm2/Vs by the space-charge-limited current (SCLC) method.

    12. Synthesis of biodegradable thermoplastic elastomers from ε-caprolactone and lactide

      Yuushou Nakayama, Kazuki Aihara, Hitomi Yamanishi, Hiroshi Fukuoka, Ryo Tanaka, Zhengguo Cai and Takeshi Shiono

      Article first published online: 24 NOV 2014 | DOI: 10.1002/pola.27463

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      The synthesis and the properties are reported of A-B-A type triblock copolymers, PLLA-block-P(CL-stat-DLLA)-block-PLLA (PLLA = poly(l-lactide)) P(CL-stat-DLLA) = poly(ε-caprolactone-stat-d,l-lactide)), as biodegradable thermoplastic elastomers. The DLLA-content of 30 mol % of P(CL-stat-DLLA) was applied because of its amorphous nature and low glass transition temperature. The triblock copolymers showed very high elongation at break and elastic properties. The corresponding d-triblock copolymers, PDLA-block-P(CL-stat-DLLA)-block-PDLAs (PDLA = poly(d-lactide)), were also prepared and blended with PLLA-block-P(CL-stat-DLLA)-block-PLLA to form stereocomplex crystals.

    13. Polymer grafting onto polyurethane backbone via Diels–Alder reaction

      Soykan Agar, Hakan Durmaz, Ufuk Saim Gunay, Gurkan Hizal and Umit Tunca

      Article first published online: 24 NOV 2014 | DOI: 10.1002/pola.27466

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      The linear polymer precursors were incorporated onto the polyurethane (PU) backbone with the anthracene pendant units through the Diels–Alder reaction. The linear aliphatic PU with the anthracene pendant groups was first prepared and subsequently α-furan-protected-maleimide terminated-linear poly(ethylene glycol) (PEG) and poly(methyl methacrylate) (PMMA) precursors were introduced into this PU backbone to yield corresponding graft copolymers, PU-g-PEG and PU-g-PMMA, via the Diels–Alder reaction.

    14. Microwave-assisted polycondensation of 4-octylaniline with dibromoarylene

      Naoto Takase, Junpei Kuwabara, Seong Jib Choi, Takeshi Yasuda, Liyuan Han and Takaki Kanbara

      Article first published online: 24 NOV 2014 | DOI: 10.1002/pola.27469

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      Pd-catalyzed aryl amination polycondensation under microwave heating facilitates a shorter reaction time and reduced catalyst loading as compared to conventional heating, while microwave heating also generates poly(arylamine)s with increased molecular weights. Investigations regarding organic field-effect transistors and organic photovoltaic cells revealed that the increase in the molecular weight of the polymer provided improved device performances of OFETs and OPVs.

    15. Novel heterocyclic poly(pyridine-imide)s with unsymmetric carbazole substituent and noncoplanar structure: High thermal, mechanical and optical transparency, electrochemical, and electrochromic properties

      Ying-Chi Huang, Kun-Li Wang, Wei-Yi Lee, Yi-An Liao, Der-Jang Liaw, Kueir-Rarn Lee and Juin-Yih Lai

      Article first published online: 21 NOV 2014 | DOI: 10.1002/pola.27438

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      Diamine-containing pyridine and unsymmetrical carbazole groups were synthesized via a Chichibabin reaction and subsequent reduction, and used in the preparation of poly(pyridine-imide)s PI-1–8. When the HCl concentration was increased, a new absorption band appeared at approximately 350 nm, and the intensity of the fluorescent peak at 380 nm observed in the neutral polymer solution decreased, along with the appearance of the new fluorescent peak at 540 nm.

  6. Erratum

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    2. You have free access to this content
      Erratum: Synthesis of unsaturation containing P(VDF-co-TrFE-co-CTFE) from P(VDF-co-CTFE) in one-pot catalyzed with Cu(0)-based single electron transfer living radical polymerization system

      Xin Hu, Shaobo Tan, Guoxin Gao, Yunchuan Xie, Qinzhuo Wang, Na Li and Zhicheng Zhang

      Article first published online: 18 NOV 2014 | DOI: 10.1002/pola.27464

      This article corrects:

      Cover Image, Volume 52, Issue 23

      Vol. 52, Issue 23, i–ii, Article first published online: 27 OCT 2014

  7. Articles

    1. Methyl branching in PE from homopolymerization of ethylene with N-arylcyano-β-diketiminate methallyl nickel-B(C6F5)3

      Oleksandra S. Trofymchuk, Griselda Barrera Galland, Marcéo A. Milani and Rene S. Rojas

      Article first published online: 10 NOV 2014 | DOI: 10.1002/pola.27456

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      The N-arylcyano-β-diketiminate methallyl nickel complexes activated with B(C6F5)3 catalyze polymerization of ethylene leading to linear low density polyethylenes with mainly isolated methyl branches. The unique nature of these materials could be an alternative to replace copolymerization of ethylene with propene.

    2. Synthesis and asymmetric anionic polymerization of substituted 7-aryl-2,6-dimethyl-1,4-benzoquinone methides

      Takahiro Uno, Hiroshi Ohta, Atsushi Yamane, Masataka Kubo and Takahito Itoh

      Article first published online: 7 NOV 2014 | DOI: 10.1002/pola.27449

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      Asymmetric anionic polymerizations of 7-substituted aryl-2,6-dimethyl-1,4-benzoquinone methides (R = p-OMe (2a), p-Cl (2b), m-Cl (2c), and o-Cl (2d)) using the complex of lithium 4-isopropylphenoxide with (−)-sparteine gave corresponding polymers with negative specific rotation. The largest specific rotation value was obtained in the polymerization of 2d with an electron-withdrawing ortho-chloro substituent.

    3. A benzophenone-naphthalimide derivative as versatile photoinitiator of polymerization under near UV and visible lights

      Jing Zhang, Nicolas Zivic, Frédéric Dumur, Pu Xiao, Bernadette Graff, Didier Gigmes, Jean Pierre Fouassier and Jacques Lalevée

      Article first published online: 7 NOV 2014 | DOI: 10.1002/pola.27451

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      A naphthalimide-benzophenone derivative (N-(4-benzophenone)-4-[2-(dimethylamino)ethyl]-1,8-naphthalimide) bearing a tertiary amine group was designed and synthesized. It can be used as a one-component photoinitiator or be incorporated into two-component photoinitiating systems for the free radical polymerization of acrylates as well as the cationic polymerization of epoxides under exposure to various LEDs. This newly developed benzophenone derivative exhibited excellent polymerization efficiency and it was even more efficient than the well-known camphorquinone based systems and the commercial photoinitiator bis(2,4,6-trimethylbenzoyl)-phenylphosphineoxide (BAPO) upon certain irradiation.

    4. Synthesis and characterization of high nitrile content polyimides as dielectric films for electrical energy storage

      David H. Wang, Brian A. Kurish, Imre Treufeld, Lei Zhu and Loon-Seng Tan

      Article first published online: 30 OCT 2014 | DOI: 10.1002/pola.27445

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      In the polyimide films, an increase in dipole moment density by the presence of three neighboring CN per repeat unit can increase relative permittivity. Polarization response results implicate that (i) an increase in the number of CN dipoles is insufficient in elevating permittivity proportionally without cooperative alignment of the multiple dipoles; (ii) paraphenylene is more effective than meta-phenylene in enhancing relative permittivity probably because of its greater facility in sub-Tg mobility (“ring flipping”) that aids such cooperative dipole alignment with applied electric field.

    5. Synthesis and characterization of copoly(amide triazole)s derived from d-Glucose

      Manuel Bueno-Martínez, Inmaculada Molina-Pinilla, Khalid Hakkou and Juan A. Galbis

      Article first published online: 27 OCT 2014 | DOI: 10.1002/pola.27444

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      Several degradable linear copoly(amide triazole)s have been prepared by thermal cycloaddition reaction, starting from monomers coming from natural regrowing resources. The copolymers present different characteristics like hydrophilicity, solubility, or thermal properties depending on the ratio of the monomers in the polymer chain or on the procedure used to their preparation. The copolymers present free secondary alcohol functions that were used for preparing polymeric networks.

    6. Comparing linear and cyclic synthetic homopolypeptides: Synthesis and molecular characterization

      Nikolaos Politakos, George Liontos, Galder Kortaberria, Jamie M. Messman, Javier Calvo, Sergio E. Moya, Jimmy W. Mays and Apostolos Avgeropoulos

      Article first published online: 24 OCT 2014 | DOI: 10.1002/pola.27434

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      The successful synthesis and characterization of linear and cyclic poly(o-Bn-l-Tyr) are described. The verification of the cyclic architecture was accomplished by various molecular characterization techniques. Special attention is given in the behavior and specific shifts in NMR spectroscopy experiments given by characteristic groups/bonds on the cyclic versus the linear corresponding homopolypeptide.

  8. Erratum

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      Erratum: Evaluation Of proton conductivity of sulfonated polyimide/dihydroxy naphthalene charge-transfer complex hybrid membranes

      Liana Christiani, Sandra Hilaire, Kazunari Sasaki and Masamichi Nishihara

      Article first published online: 30 SEP 2014 | DOI: 10.1002/pola.27419

      This article corrects:

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