Macromolecular Chemistry and Physics
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Recently Published Articles
- Polymers and Ionic Liquids: A Successful Wedding
Sébastien Livi, Jannick Duchet-Rumeau, Jean-François Gérard and Thi Nhan Pham
Article first published online: 19 DEC 2014 | DOI: 10.1002/macp.201400425
Different pathways for development of nanostructured and advanced materials are summarized, based on the use of ionic liquids (ILs) as multifunctional agents of polymer matrices. The true potential of ILs in the design of new polymeric materials with unprecedented mechanical performance, thermal stability, and barrier properties is highlighted.
- Solution-Processable Donor-Acceptor-Donor Oligomers with Cross-Linkable Functionality
Graça Brotas, Cristiana Costa, Sandra I. G. Dias, Pedro M. M. Costa, Roberto E. Di Paolo, João Martins, Joana Farinhas, Luís Alcácer, Jorge Morgado, Manuel Matos and Ana Charas
Article first published online: 18 DEC 2014 | DOI: 10.1002/macp.201400527
Cross-linkable oligomer-type molecules with a conjugated donor-acceptor-donor core are synthesized, and insoluble polymer films are prepared using different acid sources, including poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS). The new compounds show broad absorption in the UV–vis spectrum and narrow optical bandgaps, the lowest being 1.46 eV. This work open prospects for organic optoelectronic devices, in particular photovoltaic cells, of enhanced performance stability.
- Kinetically Trapped Block Copolymer Nano-Objects with Cylinder to Sphere Shape Transition Properties
Yuyan Li, Bo Peng and Yongming Chen
Article first published online: 18 DEC 2014 | DOI: 10.1002/macp.201400505
A kinetically trapped system with a cylinder to sphere shape transition property is prepared by dispersing the microphase-separated polystyrene-block-poly(N-isopropylacrylamide) (PS-b-PNIPAM) block copolymer bulk materials in ethanol. The transition process is found to be modulated by the balance between energy input and kinetic barrier. Increasing the temperature, application of ultrasound or decreasing the length of the core-forming block also accelerates the morphology transition process.
- Thermoresponsive Gold Nanoparticles with Positive UCST-Type Thermoresponsivity
Fangyao Liu and Seema Agarwal
Article first published online: 18 DEC 2014 | DOI: 10.1002/macp.201400497
A simple strategy for preparing thermoresponsive gold nanoparticles (AuNPs) is presented, showing positive UCST-type thermoresponsivity by grafting trithiocarbonate chain-end-functionalized poly(N-acryloylglycinamide) onto the AuNP surface in phosphate buffered saline. The UCST-type phase transition is reversible for many cycles. Reversible control of the phase transition is proved by turbidity measurements and UV–vis spectroscopy, as well as by transmission electron microscopy.
- Mathematical Modeling of Crystallization Elution Fractionation of Ethylene/1-Octene Copolymers
Nuttawat Chokputtanawuttilerd, Siripon Anantawaraskul, Nantiya Inwong and João B. P. Soares
Article first published online: 18 DEC 2014 | DOI: 10.1002/macp.201400518
A crystallization elution fractionation (CEF) model describing the combination of the separation powers of temperature rising elution fractionation (TREF) and dynamic crystallization (DC) is developed using the concept of population balance, crystallization/dissolution kinetics, and dispersion models. The simulated CEF profiles agree well with the experimental CEF profiles of ethylene/1-octene copolymers at various operating conditions.