Macromolecular Chemistry and Physics

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  1. pH-Responsive Aminomethyl Functionalized Poly(p-xylylene) Coatings by Chemical Vapor Deposition Polymerization

    Meike Koenig, Ramya Kumar, Christoph Hussal, Vanessa Trouillet, Leonie Barner and Joerg Lahann

    Version of Record online: 21 FEB 2017 | DOI: 10.1002/macp.201600521

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    The preparation of a pH-responsive poly(p-xylylene) derivative via chemical vapor deposition polymerization can be achieved by modification of the paracyclophane precursor with ionizable aminomethyl groups. The swelling behavior is investigated using spectroscopic ellipsometry and streaming potential measurements. The capacity regarding the coating of complex substrates with stimuli-responsive films is demonstrated by coating filter paper.

  2. Multifunctional Dendrimer Formation Using Thiolactone Chemistry

    N. Uğur Kaya, Filip E. Du Prez and Nezha Badi

    Version of Record online: 21 FEB 2017 | DOI: 10.1002/macp.201600575

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    A thiolactone-based strategy is conducted to prepare multifunctional dendrimers. In this context, a thiolactone bearing an isocyanate function is reacted with a hydroxyl terminal groups of a 4-arm poly(ethylene glycol) (step 1). Aminolysis of the thiolactone ring and subsequent thiol-acrylate reaction leads to a double functionalization (step 2). Repetition of steps 1 and 2 leads to the formation of multifunctional dendrimers.

  3. Tuning the LCST of PNIPAM via Random Oxidation-Sensitive Thioether Functionalities

    Luis Valencia, Francisco J. Enríquez, Monica Valencia and Ramón Díaz

    Version of Record online: 21 FEB 2017 | DOI: 10.1002/macp.201600556

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    A novel oxidation-responsive poly(N-isopropylacrylamide) is reported, the synthesis of which comprises the copolymerization with thiothers via reversible-addition fragmentation transfer polymerization. The lower critical solution temperature (LCST) values of the copolymers shift to very low temperatures upon copolymerization, but the value can be regulated upon oxidation with H2O2.

  4. Dual-Functional Grafted Electrospun Polymer Microfiber Scaffold Hosted Palladium Nanoparticles for Catalyzing Redox Reactions

    Sankararao Chappa, Rajaghatta Sundararam Bharath, Charlie Oommen and Ashok K. Pandey

    Version of Record online: 20 FEB 2017 | DOI: 10.1002/macp.201600555

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    The hydrazine grafted electrospun microfiber mat has been developed to reduce the precursor Pd2+ ions and provides support for the Pd nanoparticles with high accessibility and stability. The UV-grafting has been used to form a reducing polymer shell around porous poly(ether sulfone) microfibers. The uniformly hosted Pd nanoparticles in the polymer shell exhibit high catalytic activity in the redox reactions.

  5. Coassembly Modulated pH-Responsive Hydrogel for Dye Absorption and Release

    Fang Wang, Wei Ji, Jinying Liu, Jiye He and Chuanliang Feng

    Version of Record online: 20 FEB 2017 | DOI: 10.1002/macp.201600560

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    An easy but effective approach to tune the pH-responsive property of supramolecular hydrogel by coassembly from small organic molecules is reported. This system works as a good absorbent of water-soluble cationic dyes and also a good carrier for its controlled release, and exemplifies a feasible shortcut to achieve new drug-delivery system.

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