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4.287 Aktuelle Fachpublikationen zum Thema temperature

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How preparation and modification parameters affect PB‐PEO polymersome properties in aqueous solution

23.04.2016 | Joachim Habel, Anayo Ogbonna, Nanna Larsen, Simon Krabbe, Kristoffer Almdal, Claus Hélix‐Nielsen, Journal of Polymer Science Part B: Polymer Physics, 2016

ABSTRACT The effect of formation and modification methods on the physical properties of polymersomes is critical for their use in applications relying on their ability to mimic functional properties of biological membranes. In this study, we compared two formation methods for polymersomes made ...

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Influence of process parameters on the structure formation of man‐made cellulosic fibers from ionic liquid solution

22.04.2016 | Anne Michud, Michael Hummel, Herbert Sixta, Journal of Applied Polymer Science, 2016

ABSTRACT The influence of dry‐jet wet spinning parameters on the production of man‐made cellulosic fibers from 13 wt % cellulose/1,5‐diazabicyclo[4.3.0]non‐5‐ene acetate solutions was investigated. The spinneret nozzle diameter, extrusion velocity, draw ratio, and coagulation bath temperature ...

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Microencapsulated ammonium polyphosphate with boron‐modified phenolic resin

22.04.2016 | Weiying Gao, Shujun Wang, Fanbin Meng, Yuanhao Wang, Huanqing Ma, Journal of Applied Polymer Science, 2016

ABSTRACT Ammonium polyphosphate (APP) was encapsulated with boron‐modified phenolic resin (BPF) by in situ polymerization with the goal of improving its hydrophobicity, thermal stability, and compatibility in polymers. The chemical and physical features of APP microcapsules were characterized ...

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Pendant groups fine‐tuning thermal gelation of poly(ε‐caprolactone)‐b‐poly(ethylene glycol)‐b‐poly(ε‐caprolactone) aqueous solution

21.04.2016 | Yan Zhang, Miao Wang, Jinhai Ye, Meidong Lang, Journal of Polymer Science Part A: Polymer Chemistry, 2016

ABSTRACT Novel poly(ε‐caprolactone)‐b‐poly(ethylene glycol)‐b‐poly(ε‐caprolactone) (PCL‐PEG‐PCL) bearing pendant hydrophobic γ‐(carbamic acid benzyl ester) groups (PECB) and hydrophiphilic amino groups (PECN) were synthesized based on the functionalized comonomer γ‐(carbamic acid benzyl ...

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Composition and spectroscopic properties of historic Cr logwood inks

21.04.2016 | Silvia A. Centeno, Maddalena Bronzato, Polonca Ropret, Alfonso Zoleo, Alfonso Venzo, Sara Bogialli, Denis Badocco, Journal of Raman Spectroscopy, 2016

A basic recipe for making a Cr logwood ink dating to 1847 was adapted in order to obtain hues varying from orange to dark brown. The inks synthesized were characterized by Raman spectroscopy, Fourier transform infrared spectroscopy, liquid chromatography–diode array detection–quadrupole ...

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Molecular approach to phase transitions in a calamitic ester substituted aroylhydrazone liquid crystal

21.04.2016 | Rajib Nandi, Sachin Kumar Singh, Hemant Kumar Singh, D. S. Shankar Rao, S. Krishna Prasad, Bachcha Singh, Ranjan K. ..., Journal of Raman Spectroscopy, 2016

Temperature dependent Raman and X‐ray diffraction studies of a calamitic ester substituted aryolhydrazone liquid crystal (LC) system; N‐[4‐(4ʹ‐decyloxy)benzoyloxy benzylidene]‐Nʹ‐[4ʹ‐decyloxybenzoyl]hydrazine (DB2H) have been performed to investigate the molecular arrangement and intermolecular ...

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Effect of temperature and concentration of acetylated‐lignin solutions on dry‐spinning of carbon fiber precursors

20.04.2016 | Meng Zhang, Amod A. Ogale, Journal of Applied Polymer Science, 2016

ABSTRACT Carbon fibers derived from biomass such as lignin have received increasing attention due to the sustainability of the precursor. In this study, partially acetylated softwood Kraft lignin (Ace‐SKL) was investigated for the purpose of dry‐spinning into carbon fiber precursors. The ...

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Anisotropic self‐assembly and gelation in aqueous methylcellulose—theory and modeling

19.04.2016 | Valeriy V. Ginzburg, Robert L. Sammler, Wenjun Huang, Ronald G. Larson, Journal of Polymer Science Part B: Polymer Physics, 2016

ABSTRACT Recent experimental studies demonstrated that the aqueous methylcellulose (MC) polymer chains in water can form nanoscale fibrils (diameter ∼14 nm, persistence length ∼60 nm), and those fibrils can organize into networks at higher temperatures and/or concentrations, forming the ...

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An amphoteric poly(VAc‐DBM‐AM‐DMAPS) emulsion focusing on the ecological sand‐fixing in salty desert: Structure and properties

19.04.2016 | Wei Gong, Meilan Li, Yunxiao Zang, Hao Xie, Bailing Liu, Hualin Chen,, Journal of Applied Polymer Science, 2016

ABSTRACT In order to control the impacts of blown sand in salty desert, in this article, the amphoteric emulsion, for the first time, was applied as an ecological sand‐fixing material. This study started from the synthesis of the poly(vinyl acetate‐dibutyl ...

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Synergistic removal of Cu(II) and nitrazine yellow dye using an eco‐friendly chitosan‐montmorillonite hydrogel: Optimization by response surface methodology

15.04.2016 | Fahanwi Asabuwa Ngwabebhoh, Ahmet Erdem, Ufuk Yildiz, Journal of Applied Polymer Science, 2016

ABSTRACT A comprehensive feasibility study on adsorption of Cu(II) and a water‐soluble nitrazine yellow (NY) dye by chitosan‐montmorillonite (CS‐MMT) hydrogel as the biosorbent was investigated as a function of biosorbent dosage, initial concentration, pH, temperature, and the presence of ...

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