Macromolecular Chemistry and Physics

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  1. Synthesis and Characterization of Functional Triphenylphosphine-Containing Microporous Organic Polymers for Gas Storage and Separation

    Jiawei Xu, Chong Zhang, Zexiong Qiu, Zhenyu Lei, Bing Chen, Jia-Xing Jiang and Feng Wang

    Version of Record online: 21 SEP 2017 | DOI: 10.1002/macp.201700275

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    Two kinds of novel microporous organic polymers are designed and synthesized from triphenylphosphine derivatives of triphenylphosphine oxide (TBPPO) and triphenylphosphine sulfide with different triangular arylethynylene linkers. TBPPO-tris(4-ethynylphenyl)amine exhibit a high CO2 uptake capacity of 2.61 mmol g−1 at 273 K and 1.13 bar with exceptional gas selectivity of 60.2 for CO2 over N2.

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  3. Hydrocarbon-Soluble Piperazine-Containing Dilithium Anionic Initiator for High Cis-1,4 Isoprene Polymerization

    Alison R. Schultz, Sachin Bobade, Philip J. Scott and Timothy E. Long

    Version of Record online: 29 AUG 2017 | DOI: 10.1002/macp.201700201

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    The synthesis of 1,4-bis[4-(1-phenylethenyl)benzyl] piperazine and subsequent reaction with sec-butyllithium produces a novel, hydrocarbon-soluble dilithium initiator. This enables facile synthesis of well-defined isoprene-containing block copolymers with high cis-1,4 microstructure and low polydispersity.

  4. Effects of Solvents on Stereocomplex Crystallization of High-Molecular-Weight Polylactic Acid Racemic Blends in the Presence of Carbon Nanotubes

    Su Yang, Jia-Zhuang Xu, Yang Li, Jun Lei, Gan-Ji Zhong, Ruyin Wang and Zhong-Ming Li

    Version of Record online: 23 AUG 2017 | DOI: 10.1002/macp.201700292

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    Solvent species exert significant influence on the final stereocomplex (SC) content in the high-molecular-weight poly(l-lactic acid)/poly(d-lactic acid) blends, although carbon nanotubes facilitate SC formation during solution casting. Concretely, the solvent with large solvency discrepancy with poly(lactic acid) and low vapor pressure is beneficial to promote stereocomplexation, which gives a relative long span and a profitable kinetic condition for SC crystallization.

  5. Controlling Polymer Crystallization Kinetics by Sample History

    Purushottam Poudel, Sivasurender Chandran, Sumit Majumder and Günter Reiter

    Version of Record online: 23 AUG 2017 | DOI: 10.1002/macp.201700315

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    Tuned by annealing above the nominal melting temperature, isothermal crystallization kinetics of nonequilibrated isotactic polystyrene films changes systematically. Increasing the time provided for equilibration, crystal nucleation density and growth rate decrease exponentially at an extraodinary slow rate. Concurrently, the morphology changes from spherulites to hexagons of rather uniform height to finally hexagons exhibiting periodic modulations in height.