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440 Aktuelle Fachpublikationen zum Thema temperature

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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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The effect of diamine length on the direct solid state polycondensation of semi‐aromatic nylon salts

14.04.2016 | C. D. Papaspyrides, A. D. Porfyris, R. Rulkens, E. Grolman, A. J. Kolkman, Journal of Polymer Science Part A: Polymer Chemistry, 2016

ABSTRACT In the current paper, a comparative study on the direct solid state polycondensation (DSSP) reaction of different terephthalate based semi‐aromatic salts (XT salts, X = 4–18) in the TGA micro‐reactor is reported. High purity XT salts were prepared in solution and were used as starting ...

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Aluminum complex initiated copolymerization of lactones and DL‐lactide to form crystalline gradient block copolymers containing stereoblock lactyl chains

14.04.2016 | Kouki Matsubara, Kiyoka Eda, Yuki Ikutake, Misato Dan, Nao Tanizaki, Yuji Koga, Munehisa Yasuniwa, Journal of Polymer Science Part A: Polymer Chemistry, 2016

ABSTRACT The homopolymerization reactions of several lactones, as well as the copolymerization reactions of DL‐lactide with these lactones were investigated using tridentate Schiff base aluminum complexes as the initiators. ε‐Caprolactone and δ‐valerolactone polymerized efficiently at room ...

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Bio‐based aromatic copoly(ether ester)s with enhanced toughness and degradability: Influence of insertion of phenoxy‐ether linkage and eugenol‐derived composition on properties

04.04.2016 | Keling Hu, Dongping Zhao, Guolin Wu, Jianbiao Ma, Journal of Polymer Science Part A: Polymer Chemistry, 2016

ABSTRACT Two series of renewable nipagin and eugenol‐based copoly(ether ester)s, PDN11−xE1x and PDN11−xE2x (x = 0%, 10%, 20%, 30%, 40%, 50%), were prepared in the melt with 1,10‐decanediol as a comonomer. The synthesized poly(ether ester)s have weight‐average molecular weights (Mw) in the ...

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Improved self‐assembly of poly(dimethylsiloxane‐b‐ethylene oxide) using a hydrogen‐bonding additive

18.03.2016 | Yingdong Luo, Bongkeun Kim, Damien Montarnal, Zoltan Mester, Christian W. Pester, Alaina J. McGrath, Glake Hill, Edw ..., Journal of Polymer Science Part A: Polymer Chemistry, 2016

ABSTRACT Block copolymers with increased Flory–Huggins interaction parameters (χ) play an essential role in the production of sub‐10 nm nanopatterns in the growing field of directed self‐assembly for next generation lithographic applications. A library of PDMS‐b‐PEO block copolymers were ...

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Preparation of poly(styrene‐co‐butadiene) fine latex via a gemini surfactant‐induced low‐temperature initiation semibatch emulsion polymerization system

16.03.2016 | Hui Wang, Edgar Chan, Spiro Bregu, Garry L. Rempel, Journal of Polymer Science Part A: Polymer Chemistry, 2016

ABSTRACT In this report, we developed a low‐temperature semibatch emulsion polymerization process to synthesize styrene butadiene rubber (SBR) nanosized particle latex. The polymerization was carried out at an ambient temperature of 25 °C using the strong acid‐weak base salt Gemini surfactant ...

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Double responsive copolymer hydrogels prepared by frontal polymerization

16.03.2016 | Luca Nuvoli, Davide Sanna, Valeria Alzari, Daniele Nuvoli, Vanna Sanna, Luca Malfatti, Alberto Mariani, Journal of Polymer Science Part A: Polymer Chemistry, 2016

ABSTRACT Frontal polymerization was successfully used to synthesize copolymer hydrogels of poly(N‐vinylcaprolactam‐co‐itaconic acid). All materials were characterized by response to stimuli (pH and/or temperature), depending on the itaconic acid content. Namely, relatively low amounts of this ...

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Multistimuli responsive ternary polyampholytes: Formation and crosslinking of coacervates

09.03.2016 | Allison Abdilla, Shanna Shi, Nicholas A.D. Burke, Harald D.H. Stöver, Journal of Polymer Science Part A: Polymer Chemistry, 2016

ABSTRACT A series of multiresponsive ternary polyampholytes were prepared by free‐radical copolymerization of N‐(3‐aminopropyl) methacrylamide hydrochloride (APM), methacrylic acid (MAA), and N‐(2‐hydroxyethyl) acrylamide (HEA). APM and MAA were held at 1:1 molar ratio, while the HEA monomer ...

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Synthesis and flame retardant potential of polyols based on bisphenol‐S

09.03.2016 | Mark F. Sonnenschein, Justin M. Virgili, David A. Babb, Bruce M. Bell, Brian C. Nickless, Journal of Polymer Science Part A: Polymer Chemistry, 2016

ABSTRACT Polyether polyols based on bisphenol‐S were prepared by alkoxylation and compared with analogs based on bisphenol‐A, as well as standard aromatic polyester, and polyether polyols for viscosity and temperature stability. Thermo‐oxidative stability was determined by thermo‐gravimetric ...

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Modular synthesis of functional polymer nanoparticles from a versatile platform based on poly(pentafluorophenylmethacrylate)

03.03.2016 | Yeonju Lee, Jeffrey Pyun, Jeewoo Lim, Kookheon Char, Journal of Polymer Science Part A: Polymer Chemistry, 2016

ABSTRACT Control of functionalities in polymer nanoparticles (PNPs) is important for their application. Thus, there is an interest for well‐defined nanoparticle platforms to which desired functions could readily, and in modular fashion, be imparted. Herein, we report an amine‐reactive PNP ...

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