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Polymorphic states and phase transitions in a comb-like polymer having a rigid polyester backbone and flexible side chains

Danke, Varun; Gupta, Gaurav; Huth, Heiko; Schawe, Jürgen E. K.; Beiner, Mario

 ApplicationCharacterizationCustomer publicationsFoodFood scienceLipidsLiquid crystalsMaterialPhase analysisSAXSSelf-assembled materialSizeTechnique

Polymorphic states and phase transitions in a comb-like polymer having a rigid polyester backbone and flexible side chains

Danke, Varun; Gupta, Gaurav; Huth, Heiko; Schawe, Jürgen E. K.; Beiner, Mario

Structure formation in an alkoxylated polyester having rigid backbone and flexible side chains composed of 10 alkyl carbons per side chain is studied using X-ray diffraction, conventional DSC and flash DSC techniques. Two crystalline states-modification B and modification A are observed with their occurrence depending on the thermal treatment. Additionally,…
Encapsulation of Aspartic Protease in Nonlamellar Lipid Liquid Crystalline Phases

Valldeperas, Maria; Talaikis, Martynas; Dhayal, Surender K.; Veli?ka, Martynas; Barauskas, Justas; Niaura, Gediminas; Nylander, Tommy

 ApplicationCharacterizationCustomer publicationsFoodFood scienceLipidsLiquid crystalsMaterialPhase analysisProteins & DNA/RNASAXSSizeTechnique

Encapsulation of Aspartic Protease in Nonlamellar Lipid Liquid Crystalline Phases

Valldeperas, Maria; Talaikis, Martynas; Dhayal, Surender K.; Veli?ka, Martynas; Barauskas, Justas; Niaura, Gediminas; Nylander, Tommy

Encapsulation of proteins within lipid inverse bicontinuous cubic phases (Q2) has been widely studied for many applications, such as protein crystallization or drug delivery of proteins for food and pharmaceutical purposes. However, the use of the lipid sponge (L3) phase for encapsulation of proteins has not yet been well explored.…
Protic Ionic Liquids Based on the Alkyl-Imidazolium Cation: Effect of the Alkyl Chain Length on Structure and Dynamics

Abdurrokhman, Iqbaal; Elamin, Khalid; Danyliv, Olesia; Hasani, Mohammad; Swenson, Jan; Martinelli, Anna

 (Natural) polymersApplicationCharacterizationCustomer publicationsMaterialOrientation analysisPolymer researchTechniqueWAXS

Protic Ionic Liquids Based on the Alkyl-Imidazolium Cation: Effect of the Alkyl Chain Length on Structure and Dynamics

Abdurrokhman, Iqbaal; Elamin, Khalid; Danyliv, Olesia; Hasani, Mohammad; Swenson, Jan; Martinelli, Anna

Protic ionic liquids are known to form extended hydrogen-bonded networks that can lead to properties different from those encountered in the aprotic analogous liquids, in particular with respect to the structure and transport behavior. In this context, the present paper focuses on a wide series of 1-alkyl-imidazolium bis(trifluoromethylsulfonyl)imide ionic liquids,…
Liquid Crystal Elastomer Waveguide Actuators

Kuenstler, Alexa S.; Kim, Hyunki; Hayward, Ryan C.

 (Natural) polymersApplicationCharacterizationCustomer publicationsMaterialOrientation analysisPolymer researchTechniqueWAXS

Liquid Crystal Elastomer Waveguide Actuators

Kuenstler, Alexa S.; Kim, Hyunki; Hayward, Ryan C.

While most photomechanical materials developed to date have relied on free-space illumination to drive actuation, this strategy fails when direct line-of-site access is precluded. In this study, waveguided light is harnessed by liquid crystal elastomer (LCE) nanocomposites to drive actuation. Using photo-chemical reduction of gold salts to plasmonic nanoparticles, prescription…
Thermally Conductive and Electrically Insulating PVP/Boron Nitride Composite Films for Heat Spreader

Liu, Y.; Wang, N.; Ye, L.; Zehri, A.; Nylander, A.; Nkansah, A.; Lu, H.; Liu, J.

 (Natural) polymersApplicationCharacterizationCustomer publicationsFibersMaterialOrientation analysisPolymer researchTechniqueWAXS

Thermally Conductive and Electrically Insulating PVP/Boron Nitride Composite Films for Heat Spreader

Liu, Y.; Wang, N.; Ye, L.; Zehri, A.; Nylander, A.; Nkansah, A.; Lu, H.; Liu, J.

Thermally conductive materials with electrically insulating properties have been extensively investigated for thermal management of electronic devices. The combined properties of high thermal conductivity, structural stability, corrosion resistance and electric resistivity make hexagonal boron nitride (h-BN) a promising candidate for this purpose. Theoretical studies have revealed that h-BN has a…
Synergistic effects from super-small sized TiO2 and SiOx nanoparticles within TiO2/SiOx/carbon nanohybrid lithium-ion battery anode

Wang, Xiaoyan; Xia, Yonggao; Zuo, Xiuxia; Schaper, Simon J.; Yin, Shanshan; Ji, Qing; Liang, Suzhe; Yang, Zhaohui; Xia, Senlin; Xiao, Ying; Zhu, Jin; Müller-Buschbaum, Peter; Cheng, Ya-Jun

 ApplicationCharacterizationCompositesCustomer publicationsMaterialParticlesRenewable energySAXSSizeTechnique

Synergistic effects from super-small sized TiO2 and SiOx nanoparticles within TiO2/SiOx/carbon nanohybrid lithium-ion battery anode

Wang, Xiaoyan; Xia, Yonggao; Zuo, Xiuxia; Schaper, Simon J.; Yin, Shanshan; Ji, Qing; Liang, Suzhe; Yang, Zhaohui; Xia, Senlin; Xiao, Ying; Zhu, Jin; Müller-Buschbaum, Peter; Cheng, Ya-Jun

TiO2/SiOx/carbon nanohybrid consisting of super-small sized TiO2 and SiOx nanoparticles is in situ formed within the in situ formed carbon matrix using difunctional methacrylate monomers as solvent and carbon source. The relative composition of TiO2 and SiOx is systematically tuned by varying the feeding mass ratio of the precursors (TEOS/TTIP)…
Power Law Relaxations in Lamellae Forming Brush Block Copolymers with Asymmetric Molecular Shape

Yavitt, Benjamin M.; Fei, Hua-Feng; Kopanati, Gayathri N.; Winter, H. Henning; Watkins, James J.

 (Natural) polymersApplicationCharacteristic dimensionCharacterizationCustomer publicationsMaterialPolymer researchSAXSSelf-assembled materialTechniqueTemperature

Power Law Relaxations in Lamellae Forming Brush Block Copolymers with Asymmetric Molecular Shape

Yavitt, Benjamin M.; Fei, Hua-Feng; Kopanati, Gayathri N.; Winter, H. Henning; Watkins, James J.

We report the linear viscoelasticity of densely grafted poly(styrene)-block-poly(ethylene oxide) (PS-b-PEO) diblock bottlebrush block copolymers (dbBB) of equal mass fraction over a wide range of backbone degree of polymerization (Nbb = 21–119). The difference in side chain length (PS Mn = 2.9 kg/mol, PEO Mn = 5 kg/mol) produces an…
Effect of side chain and backbone length on lamellar spacing in polystyrene-block-poly(dimethyl siloxane) brush block copolymers

Fei, Huafeng; Yavitt, Benjamin M.; Kopanati, Gayathri; Watkins, James J.

 (Natural) polymersApplicationCharacteristic dimensionCharacterizationCustomer publicationsMaterialPolymer researchSAXSSelf-assembled materialTechniqueTemperature

Effect of side chain and backbone length on lamellar spacing in polystyrene-block-poly(dimethyl siloxane) brush block copolymers

Fei, Huafeng; Yavitt, Benjamin M.; Kopanati, Gayathri; Watkins, James J.

We report the synthesis of polystyrene-block-poly(dimethyl siloxane) (PS-b-PDMS) brush block copolymers (BBCPs) through sequential ROMP of norbornene-modified macromonomers (-NB) and explore the effect of side chain length (Nsc) and total backbone degree of polymerization (Nbb) on the self-assembly of lamellar morphologies. Group I (PS-NB Mn = 2.9 kg/mol, PDMS-NB Mn…
Improving Processing, Crystallization, and Performance of Poly-l-lactide with an Amide-Based Organic Compound as Both Plasticizer and Nucleating Agent

Leoné, Nils; Roy, Manta; Saidi, Sarah; de Kort, Gijs; Hermida-Merino, Daniel; Wilsens, Carolus H. R. M.

 (Natural) polymersApplicationCharacterizationCustomer publicationsMaterialOrientation analysisPolymer researchSAXSTechnique

Improving Processing, Crystallization, and Performance of Poly-l-lactide with an Amide-Based Organic Compound as Both Plasticizer and Nucleating Agent

Leoné, Nils; Roy, Manta; Saidi, Sarah; de Kort, Gijs; Hermida-Merino, Daniel; Wilsens, Carolus H. R. M.

In this work, we report on a novel hydrogen-bonding compound, N,N?-bis(2-hydroxyethyl)terephthalamide (BHET), and its potential as additive in poly-l-lactide (PLA). Although the hydroxyl groups of BHET can participate in transesterification with the PLA matrix, we demonstrate through gel permeation chromatography that extrusion at 200 °C does not result in a…
Poly(bis-arylimidazoliums) possessing high hydroxide ion exchange capacity and high alkaline stability

Fan, Jiantao; Willdorf-Cohen, Sapir; Schibli, Eric M.; Paula, Zoe; Li, Wei; Skalski, Thomas J. G.; Sergeenko, Ania Tersakian; Hohenadel, Amelia; Frisken, Barbara J.; Magliocca, Emanuele; Mustain, William E.; Diesendruck, Charles E.; Dekel, Dario R.; Holdcroft, Steven

 (Natural) polymersApplicationCharacterizationCustomer publicationsMaterialRenewable energySAXSShapeSizeTechniqueWAXS

Poly(bis-arylimidazoliums) possessing high hydroxide ion exchange capacity and high alkaline stability

Fan, Jiantao; Willdorf-Cohen, Sapir; Schibli, Eric M.; Paula, Zoe; Li, Wei; Skalski, Thomas J. G.; Sergeenko, Ania Tersakian; Hohenadel, Amelia; Frisken, Barbara J.; Magliocca, Emanuele; Mustain, William E.; Diesendruck, Charles E.; Dekel, Dario R.; Holdcroft, Steven

The hydroxide anion exchange polymers are key materials of solid polymer electrolyte devices that operate under alkaline conditions. Here the authors show the rational design of such polymers that exhibit high ion exchange capacity and exceptional stability under highly caustic…
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