Customer publications

Here is a list of publications involving a Xenocs SAXS/WAXS system in the experimental conditions.

Customer publications

Poly(N,N-diallylazacycloalkane)s for Anion-Exchange Membranes Functionalized with N-Spirocyclic Quaternary Ammonium Cations

Olsson, Joel S.; Pham, Thanh Huong; Jannasch, Patric

The alkaline stability of organic cations tethered to anion-exchange membranes (AEMs) is essential for the long-term performance of alkaline membrane fuel cells and electrolyzers. Here, we have prepared and studied the thermal and alkaline stability of a series of polyelectrolytes functionalized with N-spirocyclic quaternary ammonium (QA) cations. N,N-Diallylazacycloalkane quaternary salts…
Xenocs
12 March 2019
Customer publications

Structural studies of thermally stable, combustion-resistant polymer composites

Smith, Gregory N.; Hallett, James E.; Joseph, Paul; Tretsiakova-McNally, Svetlana; Zhang, Tan; Blum, Frank D.; Eastoe, Julian

Composites of the industrially important polymer, poly(methyl methacrylate) (PMMA), were prepared by free-radical polymerization of MMA with varying amounts (1–30 wt. %) of sodium dioctylsulfosuccinate (Aerosol OT or AOT) surfactant added to the reaction mixture. The composites with AOT incorporated show enhanced resistance to thermal degradation compared to pure PMMA…
Xenocs
12 March 2019
Customer publications

Comparative Investigation of the Thermoresponsive Behavior of Two Diblock Copolymers Comprising PNIPAM and PMDEGA Blocks

Aravopoulou, Dionysia; Kyriakos, Konstantinos; Miasnikova, Anna; Laschewsky, André; Papadakis, Christine M.; Kyritsis, Apostolos

The thermoresponsive behavior of two diblock copolymers PS-b-PNIPAM and PS-b-PMDEGA, which both comprise a hydrophobic polystyrene (PS) block but different thermoresponsive blocks, also differing in length, poly(N-isopropylacrylamide) (PNIPAM) and poly(methoxy diethylene glycol acrylate) (PMDEGA), respectively, was comparatively investigated in a wide temperature range. Concentrated aqueous…
Xenocs
12 March 2019
Customer publications

High crystalline, porous polyamide 6 by anionic polymerization

Rahman, Md Arifur; Renna, Lawrence A.; Venkataraman, D.; Desbois, Philippe; Lesser, Alan J.

Polyamide 6 (PA6), also known as Nylon 6 is a widely used industrial polymer. The structural properties of PA6 play an important role in its potential commercial applications. We report that the anionic polymerization of ε-caprolactam in the presence of liquid additives such as o-Xylene, m-Xylene, p-Xylene and toluene at…
Xenocs
12 March 2019
Customer publications

Understanding Thermal Insulation in Porous, Particulate Materials

Ruckdeschel, Pia; Philipp, Alexandra; Retsch, Markus

Silica hollow nanosphere colloidal crystals feature a uniquely well-defined structure across multiple length scales. This contribution elucidates the intricate interplay between structure and atmosphere on the effective thermal diffusivity as well as the effective thermal conductivity. Using silica hollow sphere assemblies, one can independently alter the particle geometry, the density,…
Xenocs
12 March 2019
Customer publications

Bulk and Surface Morphologies of ABC Miktoarm Star Terpolymers Composed of PDMS, PI, and PMMA Arms

Chernyy, Sergey; Kirkensgaard, Jacob Judas Kain; Mahalik, Jyoti P.; Kim, Hyeyoung; Arras, Matthias M. L.; Kumar, Rajeev; Sumpter, Bobby G.; Smith, Gregory S.; Mortensen, Kell; Russell, Thomas P.; Almdal, Kristoffer

DIM miktoarm star copolymers, composed of polydimethylsiloxane , poly(1,4-isoprene) , and poly(methyl methacrylate) , were synthesized using a newly developed linking methodology with 4-allyl-1,1-diphenylethylene as a linking agent. The equilibrium bulk morphologies of the DIM stars were found to range from tiling patterns to alternating lamellar and alternating cylindrical…
Xenocs
12 March 2019
Customer publications

Phase Behavior and Self-Assembly of Perfectly Sequence-Defined and Monodisperse Multiblock Copolypeptides

MacEwan, Sarah R.; Weitzhandler, Isaac; Hoffmann, Ingo; Genzer, Jan; Gradzielski, Michael; Chilkoti, Ashutosh

This paper investigates how the properties of multiblock copolypeptides can be tuned by their block architecture, defined by the size and distribution of blocks along the polymer chain. These parameters were explored by the precise, genetically encoded synthesis of recombinant elastin-like polypeptides (ELPs). A family of ELPs was synthesized in…
Xenocs
12 March 2019
Customer publications

Poly(arylene piperidinium) Hydroxide Ion Exchange Membranes: Synthesis, Alkaline Stability, and Conductivity

Olsson, Joel S.; Pham, Thanh Huong; Jannasch, Patric

A series of poly(arylene piperidinium)s (PAPipQs) devoid of any alkali-sensitive aryl ether bonds or benzylic sites are prepared and studied as anion exchange membranes (AEMs) for alkaline fuel cells. First, the excellent alkaline stability of the model compound 4,4-diarylpiperidinium is confirmed. Medium molecular weight poly(arylene piperidine)s are then synthesized in…
Xenocs
12 March 2019
Customer publications

Molecular Alignment in Polyethylene during Cold Drawing Using In-Situ SANS and Raman Spectroscopy

López-Barrón, Carlos R.; Zeng, Yiming; Schaefer, Jonathan J.; Eberle, Aaron P. R.; Lodge, Timothy P.; Bates, Frank S.

Changes in the crystalline and mesoscale lamellar structure during plastic deformation of semicrystalline polymers have been extensively studied by X-ray diffraction techniques. However, direct measurements of single chain conformations during stretching have not been realized, although they are key to fully understand the structural transitions during cold drawing and their…
Xenocs
12 March 2019
Customer publications

Polystyrene-block-poly(ethylene oxide) Bottlebrush Block Copolymer Morphology Transitions: Influence of Side Chain Length and Volume Fraction

Gai, Yue; Song, Dong-Po; Yavitt, Benjamin M.; Watkins, James J.

A systematic study was conducted to investigate the morphology transitions that occur in polystyrene-block-poly(ethylene oxide) (PS-b-PEO) bottlebrush block copolymers (BBCP) upon varying PEO volume fraction (fPEO) from 22% to 81%. A series of PS-b-PEO BBCPs with different PEO side chain lengths were prepared using ring-opening metathesis polymerization (ROMP) of PEO–norbornene…
Xenocs
12 March 2019

SAXS WAXS Articles

SAXS WAXS Articles

SAXS WAXS Articles – Publications With SAXS Measurements

SAXS WAXS Articles – Publications With SAXS Or WAXS Measurements Using Xenocs SAXS WAXS GISAXS Instruments In The Laboratory