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Influence of electron beam irradiation on the morphology and mechanical properties of styrene/butadiene triblock copolymers

Khatiwada, Shankar P.; Gohs, Uwe; Janke, Andreas; Jehnichen, Dieter; Heinrich, Gert; Adhikari, Rameshwar

Customer publications

Influence of electron beam irradiation on the morphology and mechanical properties of styrene/butadiene triblock copolymers

Khatiwada, Shankar P.; Gohs, Uwe; Janke, Andreas; Jehnichen, Dieter; Heinrich, Gert; Adhikari, Rameshwar

The crosslinking of a styrene/butadiene triblock copolymer via electron beam (EB) treatment and its influence on morphology and mechanical properties were studied. Different doses were applied to study the effect on the modification of polybutadiene segments of the triblock copolymers whereby the highly ordered hexagonal packed type of the morphology…
Hydrogen-Bonded Siloxane Liquid Crystals for Hybrid Nanomaterials

Nickmans, Koen; Jansma, Sjoerd O.; Hey, Daniela; Velpula, Gangamallaiah; Teyssandier, Joan; Feyter, Steven De; Schenning, Albert P. H. J.

Customer publications

Hydrogen-Bonded Siloxane Liquid Crystals for Hybrid Nanomaterials

Nickmans, Koen; Jansma, Sjoerd O.; Hey, Daniela; Velpula, Gangamallaiah; Teyssandier, Joan; Feyter, Steven De; Schenning, Albert P. H. J.

The self-assembly of molecular inorganic/organic hybrid building blocks into ordered hierarchical nanomaterials with a tunable morphology is an enormous challenge. Here, we describe the synthesis and characterization of a novel liquid crystalline hydrogen-bonding hepta(dimethylsiloxane) azobenzene carboxylic acid dimer. This inorganic/organic hybrid dimer forms sub-5 nm lamellar features in the…
Ring-Banded Spherulitic Crystals of Poly(3-butylthiophene) via Controlled Solvent Evaporation

Armas, Jeremy A.; Reynolds, Karina J.; Marsh, Zachary M.; Stefik, Morgan; Scott, Gregory E.; Zhang, Shanju

Customer publications

Ring-Banded Spherulitic Crystals of Poly(3-butylthiophene) via Controlled Solvent Evaporation

Armas, Jeremy A.; Reynolds, Karina J.; Marsh, Zachary M.; Stefik, Morgan; Scott, Gregory E.; Zhang, Shanju

The preparation of ring-banded spherulites in poly(3-butylthiophene) via controlled solvent evaporation of solution-cast films is reported. The spherulites display unusual concentric ring-banded structures under both polarized and unpolarized lights. The size of the ring-banded spherulites is 300 ± 100 µm in diameter and the periodicity of the bands is 15…
Highly Entangled α-Olefin Molecular Bottlebrushes: Melt Structure, Linear Rheology, and Interchain Friction Mechanism

López-Barrón, Carlos R.; Tsou, Andy H.; Hagadorn, John R.; Throckmorton, Joseph A.

Customer publications

Highly Entangled α-Olefin Molecular Bottlebrushes: Melt Structure, Linear Rheology, and Interchain Friction Mechanism

López-Barrón, Carlos R.; Tsou, Andy H.; Hagadorn, John R.; Throckmorton, Joseph A.

Linear viscoelastic response and melt microstructure of ultra-high molecular weight poly(α-olefins) (UHMW PO) with bottlebrush architectures, from poly(1-hexene) to poly(1-octadecene) synthesized by metal coordinative insertion polymerization, were measured as a function of side-chain length, Nsc. All these bottlebrush POs are highly entangled, with an average number of entanglements per chain,…
Ferrihydrite Nanoparticle Aggregation Induced by Dissolved Organic Matter

Gentile, Luigi; Wang, Tao; Tunlid, Anders; Olsson, Ulf; Persson, Per

Customer publications

Ferrihydrite Nanoparticle Aggregation Induced by Dissolved Organic Matter

Gentile, Luigi; Wang, Tao; Tunlid, Anders; Olsson, Ulf; Persson, Per

Ferrihydrite (Fh) nanoparticles are omnipresent in nature and often highly mobile because of their colloidal stability. Thus, Fh serves as a vector for iron as well as associated nutrients and contaminants. Here, we demonstrate, using small-angle X-ray scattering combined with cryo-transmission electron microscopy (cryo-TEM), that dissolved organic matter (DOM), extracted…