Journal of Polymer Science Part A: Polymer Chemistry

Cover image for Vol. 52 Issue 22

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. Iron complexes as photoinitiators for radical and cationic polymerization through photoredox catalysis processes

    Jing Zhang, Damien Campolo, Frederic Dumur, Pu Xiao, Jean Pierre Fouassier, Didier Gigmes and Jacques Lalevée

    Article first published online: 23 OCT 2014 | DOI: 10.1002/pola.27435

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    A series of iron complexes (FeCs) were developed and applied as photocatalysts in photoinitiating systems for radical and cationic polymerization. These FeC-based systems exhibit photocatalytic properties, undergo the formation of radicals, radical cations, and cations and can operate through oxidation or/and reduction cycles. These reported systems are characterized by an unprecedented reactivity on LED irradiation. Contrary to the most famous reference system (BAPO), the newly developed systems with very low FeC content (0.02 wt %) is still highly efficient in photopolymerization, illustrating the performance of the proposed catalytic approach.

  2. ROMP synthesis of novel thermo-, pH-, and salt-responsive (co)polymers containing the morpholino functional group

    Johannes A. van Hensbergen, Sylvia Ganda, Peter J. Roth, Robert P. Burford and Andrew B. Lowe

    Article first published online: 21 OCT 2014 | DOI: 10.1002/pola.27436

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    A series of new (co)polymers containing the multiresponsive morpholino functional group have been prepared by ring-opening metathesis polymerization (ROMP) with RuCl2(PCy3)2CHPh.

  3. Using controlled radical polymerization to confirm the lower critical solution temperature of an N-(alkoxyalkyl) acrylamide polymer in aqueous solution

    Xeniya Savelyeva, Lucia Li and Milan Marić

    Article first published online: 21 OCT 2014 | DOI: 10.1002/pola.27437

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    Poly(N-(3-methoxypropyl) acrylamide (MPAM) homopolymers and block copolymers with N,N-diethylacrylamide (DEAAM) as a second block were synthesized and well controlled by CRP methods, particularly RAFT. The solution properties were assessed by UV–Vis and dynamic light scattering. Dual lower critical solution temperature type behavior was found for the block copolymers and the cloud point temperature of poly(MPAM) was determined to be about 73–92 °C, depending on molecular weight and solution concentration.

  4. Dynamic covalent polypeptides showing tunable secondary structures and thermoresponsiveness

    Jiatao Yan, Kun Liu, Xiuqiang Zhang, Wen Li and Afang Zhang

    Article first published online: 19 OCT 2014 | DOI: 10.1002/pola.27433

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    The imine condensation from poly(l-lysine)s and oligoethylene glycol (OEG)-based dendritic aldehydes afforded dynamic OEGylated polypeptides, which show enhanced helical conformation and superior thermoresponsive properties. Their phase transition temperatures were governed predominately by terminal groups and coverage of OEG dendrons, and could be tuned simply by varying ratios of OEG dendrons with different hydrophilicity. Furthermore, thermally induced dehydration and aggregation was found to enhance the imine formation and, at the same time, to switch helical conformations of polypeptides.

  5. Synthesis via ATRP, kinetics study and characterization (molecular-morphological) of 3-Arm star diblock copolymers of the (PS-b-P2VP)3 type

    George Polymeropoulos, Dimitrios Moschovas, Anastasia Kati, Apostolos Karanastasis, Styliani Pelekanou, Panagiotis Christakopoulos, Georgios Sakellariou and Apostolos Avgeropoulos

    Article first published online: 18 OCT 2014 | DOI: 10.1002/pola.27432

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    The successful synthesis via ATRP of 3-arm star homopolymers and corresponding diblock copolymers of the (PS)3 and (PS-b-P2VP)3 types, through an initiator bearing three –Br groups, is discussed. A kinetics study is performed for the synthesis of the star homopolymer to evaluate polymerization time versus polydispersity, molecular weight, and yield. Molecular characterization through various techniques verifies the preparation of both architectures and TEM studies confirm the microphase separation of the final copolymers.

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