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Unusual Fractional Crystallization Behavior of Novel Crystalline/Crystalline Polymer Blends of Poly(ethylene suberate) and Poly(ethylene oxide) with Similar Melting Points

19-11-2014 | Mengting Weng; Zhaobin Qiu, Macromolecules, 2014

Novel crystalline/crystalline polymer blends of biodegradable poly(ethylene suberate) (PESub) and biocompatible poly(ethylene oxide) (PEO) were prepared through a solution and casting method. The basic thermal properties, including both glass transition temperature and melting point, of both of ...

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Crystallization-Driven Solution Self-Assembly of μ-ABC Miktoarm Star Terpolymers with Core-Forming Polyferrocenylsilane Blocks

19-11-2014 | Adam Nunns; George R. Whittell; Mitchell A. Winnik; Ian Manners, Macromolecules, 2014

A comparative study of the solution self-assembly behavior of two polystyrene-arm-polyisoprene-arm-polyferrocenylsilane (μ-SIF) miktoarm star terpolymers of similar composition has been conducted: one with a short, atactic, noncrystallizable poly(ferrocenylethylmethylsilane) (PFEMS) block ...

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Swelling Behaviors of Doubly Thermosensitive Core–Shell Nanoparticle Gels

19-11-2014 | Sang Min Lee; Young Chan Bae, Macromolecules, 2014

Novel UCST (upper critical solution temperature) type doubly thermosensitive core–shell nanoparticle gels were prepared in order to investigate swelling behaviors. The core–shell nanoparticle gels are synthesized via precipitation polymerization and are composed of a chemically cross-linked ...

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Analytical Solution of Free Radical Polymerization: Applications- Implementing Gel Effect Using CCS Model

18-11-2014 | Dhiraj K. Garg; Christophe A. Serra; Yannick Hoarau; Dambarudhar Parida; M. Bouquey; R. Muller, Macromolecules, 2014

This article presents the implementation of the Chiu, Carratt, and Soong (CCS) gel/glass model in an analytical solution (AS) derived for the free radical polymerization under isothermal condition. This implantation allows AS to be applicable for the whole range of conversion thus making it more ...

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Core-Liquid-Induced Transition from Coaxial Electrospray to Electrospinning of Low-Viscosity Poly(lactide-co-glycolide) Sheath Solution

12-11-2014 | C. J. Luo; M. Edirisinghe, Macromolecules, 2014

Co-electrospinning has demonstrated that polymer solutions below the entanglement concentration can be made into fibers as an encapsulated core in an electrospinnable sheath solution containing a carrier/template polymer. The carrier polymer may require removal at a later stage. This work shows ...

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Effect of Isomerism on Molecular Packing and Gas Transport Properties of Poly(benzoxazole-co-imide)s

11-11-2014 | Yongbing Zhuang; Jong Geun Seong; Yu Seong Do; Hye Jin Jo; Moon Joo Lee; Gang Wang; Michael D. Guiver; Young Moo Lee, Macromolecules, 2014

A facile approach to synthesize poly(benzoxazole-co-imide)s without thermal rearrangement at high temperature is proposed. Poly(benzoxazole-co-imide)s with improved mechanical and solution-processable properties were prepared through polycondensation of 4,4′-(hexafluoroisopropylidene) diphthalic ...

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Multiresponsive Microcapsules Based on Multilayer Assembly of Star Polyelectrolytes

10-11-2014 | Weinan Xu; Petr A. Ledin; Felix A. Plamper; Christopher V. Synatschke; Axel H. E. Müller; Vladimir V. Tsukruk, Macromolecules, 2014

Star polyelectrolytes (poly(N,N-dimethylaminoethyl methacrylate) (PDMAEMA)) with dual (temperature and pH) responsive properties were utilized to fabricate multiresponsive microcapsules via layer-by-layer (LbL) assembly. The LbL microcapsules are very robust and uniform, with higher stability and ...

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Heating and Annealing Induced Structural Reorganization and Embrittlement of Solution-Crystallized Poly(l-lactic acid)

06-11-2014 | Pengju Pan; Lili Han; Guorong Shan; Yongzhong Bao, Macromolecules, 2014

Macromolecules DOI: 10.1021/ma501956f

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Specific Interactions of Ag+ Ions with Anionic Polyacrylate Chains in Dilute Solution

05-11-2014 | A. Ezhova; K. Huber, Macromolecules, 2014

A detailed light scattering investigation is presented on dilute solutions of two long-chain sodium polyacrylates (NaPA) in the presence of monovalent Ag+ ions in 0.01 M NaNO3 aqueous solution at a pH of 9. The relevance for the investigation is based on two features: (i) despite its monovalency, ...

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Studying the Interactions of Polyethylene with Graphite in the Presence of Solvent by High Temperature Thermal Gradient Interactive Chromatography, Thermal Gradient Nuclear Magnetic Resonance Spectroscopy, and Solution Differential Scanning Calorimetry

05-11-2014 | D. Mekap; F. Malz; R. Brüll; Z. Zhou; R. Cong; A. W. deGroot; A. R. Parrott, Macromolecules, 2014

High temperature thermal gradient interactive chromatography (HT-TGIC or TGIC) has emerged as an important analytical tool to determine the comonomer content distribution (CCD) present in copolymers of polyethylene (PE). The method separates the macromolecules according to the differences in ...

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