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Design, Synthesis and Characterization of Coordination Polymer from [Cu(DMF)4(SCN)2] as a Precursor

12-12-2014 | Xiaotong Liu, Feng Zhou, Qiuxuan Zhou, Lihua Wang, Yong Zhang, Qingfeng Xu, Jianmei Lu, Chinese Journal of Chemistry, 2014

Abstract This paper is focused on investigation of coordination polymers constructed by Cu(II) and rigid pyridyl ligands, such as 4,4′‐bipyridyl‐1,2,4‐triazole (Hpytz) and 1,10‐phenanthroline (phen) from a mononuclear precursor [Cu(DMF)4(NCS)2] (1). As expected, the complex was self‐assembled ...


Influence of branching regularity on the behavior of hyperbranched polymers in solutions

11-12-2014 | Alexander Filippov, Alina I. Amirova, Tatiana Kirila, Elena V. Belyaeva, Natalia A. Sheremetyeva, Aziz M. Muzafarov, Polymer International, 2014

Summary Carbosilane pseudo‐dendrimer with irregular structure and degree of branching DB = 1 is synthesized and fractionated. The molar masses of obtained fractions range from 5000 to 490000 g mol−1. The hydrodynamic and conformational properties are studied by the methods of light scattering, ...


Ordered Alternating Binary Polymer Nanodroplet Array by Sequential Spin Dewetting

01-12-2014 | Nandini Bhandaru; Anuja Das; Namrata Salunke; Rabibrata Mukherjee, Nano Letters, 2014

We report a facile technique for fabricating an ordered array of nearly equal-sized mesoscale polymer droplets of two constituent polymers (polystyrene, PS and poly(methyl methacrylate), PMMA) arranged in an alternating manner on a topographically patterned substrate. The self-organized array of ...


H- and J-Aggregation of Fluorene-Based Chromophores

01-12-2014 | Yonghong Deng; Wen Yuan; Zhe Jia; Gao Liu, Journal of Physical Chemistry B, 2014

Understanding of H- and J-aggregation behaviors in fluorene-based polymers is significant both for determining the origin of various red-shifted emissions occurring in blue-emitting polyfluorenes and for developing polyfluorene-based device performance. In this contribution, we demonstrate a new ...


Novel heterocyclic poly(pyridine‐imide)s with unsymmetric carbazole substituent and noncoplanar structure: High thermal, mechanical and optical transparency, electrochemical, and electrochromic properties

21-11-2014 | Ying‐Chi Huang, Kun‐Li Wang, Wei‐Yi Lee, Yi‐An Liao, Der‐Jang Liaw, Kueir‐Rarn Lee, Juin‐Yih Lai, Journal of Polymer Science Part A: Polymer Chemistry, 2014

ABSTRACT A diamine containing heterocyclic pyridine and unsymmetrical carbazole substituents, 4‐(9‐ethyl‐3‐carbazole)‐2,6‐bis(4‐aminophenyl)pyridine (CBAPP), was prepared for use in the synthesis of poly(pyridine‐imide)s PI‐1–8 by direct polycondensation with dianhydrides in ...


Anomalous diffusion of Ibuprofen in cyclodextrin nanosponge hydrogels: an HRMAS NMR study

19-11-2014 | Monica Ferro, Franca Castiglione, Carlo Punta, Lucio Melone, Walter Panzeri, Barbara Rossi, Francesco Trotta and And ..., Beilstein Journal of Organic Chemistry, 2014

Abstract Ibuprofen sodium salt (IP) was encapsulated in cyclodextrin nanosponges (CDNS) obtained by cross-linking of β-cyclodextrin with ethylenediaminetetraacetic acid dianhydride (EDTAn) in two different preparations: CDNSEDTA 1:4 and 1:8, where the 1:n notation indicates the CD to EDTAn ...


Molecular Dynamics Simulations of Hyperbranched PAMAM Vicsek Fractals

19-11-2014 | Florian Fürstenberg, Andrey A. Gurtovenko, Maxim Dolgushev, Alexander Blumen, Macromolecular Theory and Simulations, 2014

Within the broad class of hyperbranched polymers, highly symmetrical objects (such as dendrimers and Vicsek fractals) are of special theoretical interest. Here we study, using the MARTINI force‐field, polyamidoamine Vicsek fractals (PVF) in silico, focusing on their structure and dynamics in ...


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 ...


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 ...


Thermal property, morphology, and hydrolysis ability of poly(lactic acid)/chitosan nanocomposites using polyethylene oxide

18-11-2014 | Nguyen Thuy Chinh, Nguyen Thi Thu Trang, Dinh Thi Mai Thanh, To Thi Xuan Hang, Nguyen Vu Giang, Pham Minh Quan, Nguy ..., Journal of Applied Polymer Science, 2014

ABSTRACT Poly(lactic acid) (PLA) and chitosan (CS) are two natural resource polymers, which have been applied widely into different fields. Polymer composites based on PLA and CS have some advantages such as good adhesion, biodegradability, biocompatibility, and high stability. They can be ...


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