Skip to main content
All Posts By

Creep-resistant behavior of beta-polypropylene with different crystalline morphologies

Jia, Chenfei; Liao, Xia; Zhu, Jingjun; An, Zhu; Zhang, Qiongwen; Yang, Qi; Li, Guangxian

Customer publications

Creep-resistant behavior of beta-polypropylene with different crystalline morphologies

Jia, Chenfei; Liao, Xia; Zhu, Jingjun; An, Zhu; Zhang, Qiongwen; Yang, Qi; Li, Guangxian

β-Phase isotactic polypropylene (β-iPP) specimens with different contents of β-phase nucleating agent were employed to investigate the deformation-induced microstructure evolution during creep behavior. Morphological investigations by SEM showed that the crystalline morphologies of β-iPP were controlled by the content of the β-phase nucleating agent, namely, well-developed β-spherulites induced…
Crowding-Controlled Cluster Size in Concentrated Aqueous Protein Solutions: Structure, Self- and Collective Diffusion

Braun, Michal K.; Grimaldo, Marco; Roosen-Runge, Felix; Hoffmann, Ingo; Czakkel, Orsolya; Sztucki, Michael; Zhang, Fajun; Schreiber, Frank; Seydel, Tilo

Customer publications

Crowding-Controlled Cluster Size in Concentrated Aqueous Protein Solutions: Structure, Self- and Collective Diffusion

Braun, Michal K.; Grimaldo, Marco; Roosen-Runge, Felix; Hoffmann, Ingo; Czakkel, Orsolya; Sztucki, Michael; Zhang, Fajun; Schreiber, Frank; Seydel, Tilo

We investigate the concentration-controlled formation of clusters in β-lactoglobulin (BLG) protein solutions combining structural and dynamical scattering techniques. The static structure factor from small-angle X-ray scattering as well as de-Gennes narrowing in the nanosecond diffusion function D(q) from neutron spin echo spectroscopy support a picture of cluster formation. Using neutron…
Crack growth mechanism of styrene-butadiene rubber filled with silica nanoparticles studied by small angle X-ray scattering

Weng, Gengsheng; Chang, Aijun; Fu, Kun; Kang, Jian; Ding, Yaxuan; Chen, Zhongren

Customer publications

Crack growth mechanism of styrene-butadiene rubber filled with silica nanoparticles studied by small angle X-ray scattering

Weng, Gengsheng; Chang, Aijun; Fu, Kun; Kang, Jian; Ding, Yaxuan; Chen, Zhongren

The crack growth mechanism of rubber composites has not been explored clearly. Here, we focus on the microstructure evolution of styrene-butadiene rubber/silica (SBR/silica) composites during crack propagation. Two groups of SBR/silica composites are constructed. The silica nanoparticles used in the two groups have different sizes but the same surface properties.…
Converting Carbohydrates to Carbon-Based Photocatalysts for Environmental Treatment

Hu, Zhuofeng; Shen, Zhurui; Yu, Jimmy C.

Customer publications

Converting Carbohydrates to Carbon-Based Photocatalysts for Environmental Treatment

Hu, Zhuofeng; Shen, Zhurui; Yu, Jimmy C.

Carbohydrates in biomass can be converted to semiconductive hydrothermal carbonation carbon (HTCC), a material that contains plenty of sp2-hybridization structures. Under solar light illumination, HTCC generates photoexcited electrons, holes, and hydroxyl radicals. These species can be used for photocatalytic treatment such as water disinfection and degradation of organic pollutants. The…
Controlling the generation of bilayer and multilayer vesicles in block copolymer/epoxy blends by a slow photopolymerization process

Puig, J.; Ceolín, M.; Williams, R. J. J.; Schroeder, W. F.; Zucchi, I. A.

Customer publications

Controlling the generation of bilayer and multilayer vesicles in block copolymer/epoxy blends by a slow photopolymerization process

Puig, J.; Ceolín, M.; Williams, R. J. J.; Schroeder, W. F.; Zucchi, I. A.

Vesicles are a highly attractive morphology to achieve in micellar dispersions of block copolymers (BCP) in epoxy thermosets due to the fact that small amounts can affect a large volume fraction of the matrix, a fact that is important for toughening purposes. However, generating vesicles in epoxy matrices requires operating…
Controlling Crystal Microstructure To Minimize Loss in Polymer Dielectrics

Miranda, Daniel F.; Zhang, Shihai; Runt, James

(Natural) polymersCustomer publicationsOrientation analysisPhase analysisPolymer researchSAXS

Controlling Crystal Microstructure To Minimize Loss in Polymer Dielectrics

Miranda, Daniel F.; Zhang, Shihai; Runt, James

A model semicrystalline polymer, poly(ethylene naphthalate) (PEN), was used to examine how morphological factors inhibit chain segment relaxations that contribute to dielectric loss. This was achieved by manipulating the extent of crystallization and the crystalline microstructure through a combination of annealing and uniaxial drawing and investigating the effects on dielectric…
Composite bottlebrush mechanics: α-internexin fine-tunes neurofilament network properties

Kornreich, M.; Malka-Gibor, E.; Laser-Azogui, A.; Doron, O.; Herrmann, H.; Beck, R.

Customer publications

Composite bottlebrush mechanics: α-internexin fine-tunes neurofilament network properties

Kornreich, M.; Malka-Gibor, E.; Laser-Azogui, A.; Doron, O.; Herrmann, H.; Beck, R.

Neuronal cytoplasmic intermediate filaments are principal structural and mechanical elements of the axon. Their expression during embryonic development follows a differential pattern, while their unregulated expression is correlated to neurodegenerative diseases. The largest neurofilament proteins of medium (NF-M) and high molecular weight (NF-H) were shown to modulate the axonal architecture…
Cold Crystallization of PDMS and PLLA in Poly(l-lactide-b-dimethylsiloxane-b-l-lactide) Triblock Copolymer and Their Effect on Nanostructure Morphology

Nagarajan, S.; Gowd, E. Bhoje

Customer publications

Cold Crystallization of PDMS and PLLA in Poly(l-lactide-b-dimethylsiloxane-b-l-lactide) Triblock Copolymer and Their Effect on Nanostructure Morphology

Nagarajan, S.; Gowd, E. Bhoje

Poly(l-lactide-b-dimethylsiloxane-b-l-lactide) (PLLA-b-PDMS-b-PLLA) triblock copolymer was synthesized by ring-opening polymerization of l-lactide using bis(hydroxyalkyl)-terminated PDMS as a macroinitiator. The block copolymer was immiscible in the melt, and the melt morphology was preserved upon cooling the melt to −120 °C. It was also observed that at moderate cooling rates PDMS and PLLA…