Category

Phase analysis

(Natural) polymersApplicationCharacterizationCrystalline fractionCustomer publicationsMaterialOrientation analysisPhase analysisPolymer researchSAXSTechniqueTemperatureWAXS

Predicting the location of weld line in microinjection-molded polyethylene via molecular orientation distribution

Liao, Tao; Zhao, Xintong; Yang, Xiao; Whiteside, Ben; Coates, Phil; Jiang, Zhiyong; Men, Yongfeng

The microstructure and molecular orientation distribution over both the length and the thickness of microinjection-molded linear low-density polyethylene with a weld line were characterized as a function of processing parameters using small-angle X-ray scattering and wide-angle X-ray diffraction techniques. The weld line was introduced via recombination of two separated melt…
(Hydro)gelsApplicationCharacterizationCustomer publicationsMaterialOtherPhase analysisPorous materialSAXSTechnique

Highly Stretchable Photonic Crystal Hydrogels for a Sensitive Mechanochromic Sensor and Direct Ink Writing

Chen, Jiayao; Xu, Lirong; Yang, Meijia; Chen, Xiaochuan; Chen, Xudong; Hong, Wei

Photonic crystals, which are materials with periodic dielectric constants on the submicroscale, have been the focus of research for an extended period. Photonic soft materials have been extensively developed for use as colorimetric indicators and mechanochromic sensors, but their limited mechanical properties and molding characteristics only suitable for films restrict…
(Natural) polymersApplicationCharacterizationCustomer publicationsMaterialPhase analysisPolymer researchTechniqueTemperatureWAXS

Crystallization of forms I? and form II of polybutene-1 in stretched polypropylene/polybutene-1 blends

Xu, Yao; Ma, Yaping; Liu, Chenguang; Men, Yongfeng; He, Aihua

In this work, the effects of orientated crystal morphology of polypropylene (PP) induced by tensile stretching on the subsequent crystallization behavior of polybutene-1 (PB-1) in the incompatible PP/PB-1 (50/50) blends were studied. When the PP/PB-1 blends were stretched at a temperature above melting temperature (Tm) of PB-1 but below the…
(Natural) polymersApplicationCharacterizationCustomer publicationsFractal dimensionMaterialPhase analysisPolymer researchSAXSTechnique

Differential Polymorphic Transformation Behavior of Polybutene-1 with Multiple Isotactic Sequences

Ma, Ya-Ping; Zheng, Wei-Ping; Liu, Chen-Guang; Shao, Hua-Feng; Nie, Hua-Rong; He, Ai-Hua

For the solid-solid transformation from form II to form I of isotactic polybutene-1 (iPB), the temperature dependence of form I nucleation and growth was deemed to control the transformation process. However, the relationship between form I formation and form II disappearance in the transformation process is not clear. In this…
(Natural) polymersApplicationCharacterizationCrystalline fractionCustomer publicationsMaterialPhase analysisPolymer researchSAXSTechniqueTemperatureWAXS

Influence of hydrogen bonding on the crystallization behavior of poly(ethylene oxide)/ionic liquids mixtures

Li, Wenze; Gong, Pengjian; Huang, Yajiang; Niu, Yanhua; Li, Guangxian

Two types of imidazolium-based ionic liquids (ILs) and and their mixtures were blended with poly(ethylene oxide) (PEO) matrix to tune the strength of intermolecular hydrogen bonding in the system. With the addition of ILs, particularly increasing ratio, significantly reduced overall crystallization kinetics in the order of pure…
(Natural) polymersApplicationCharacterizationCustomer publicationsGIWAXSInorganic materialMaterialOrientation analysisPhase analysisPolymer researchSurface structure and patternsTechnique

How Confinement Affects the Nucleation, Crystallization, and Dielectric Relaxation of Poly(butylene succinate) and Poly(butylene adipate) Infiltrated within Nanoporous Alumina Templates

Safari, Maryam; Maiz, Jon; Shi, Guangyu; Juanes, Diana; Liu, Guoming; Wang, Dujin; Mijangos, Carmen; Alegría, Ángel; Müller, Alejandro J.

This work describes the successful melt infiltration of poly(butylene succinate) (PBS) and poly(butylene adipate) (PBA) within 70 nm diameter anodic aluminum oxide (AAO) templates. The infiltrated samples were characterized by SEM, Raman, and FTIR spectroscopy. The crystallization behaviors and crystalline structures of both polymers, bulk and confined, were analyzed by…
(Natural) polymersApplicationCharacterizationCrystalline fractionCustomer publicationsMaterialPhase analysisPolymer researchSAXSTechniqueTemperatureWAXS

Introducing Functionality to Fluorinated Electroactive Polymers

Kallitsis, Konstantinos; Soulestin, Thibaut; Tencé-Girault, Sylvie; Brochon, Cyril; Cloutet, Eric; Domingues Dos Santos, Fabrice; Hadziioannou, Georges

Fluorinated electroactive polymers (FEPs) are among the most interesting insulating materials for the production of organic electronic devices. Their ability to tune their response to an applied electric field makes them appropriate for vastly different applications in electronics. However, due to the chemical inertness of such polymers and the rather…
(Natural) polymersApplicationCharacteristic dimensionCharacterizationCustomer publicationsMaterialOtherPhase analysisPolymer researchSAXSSelf-assembled materialTechniqueTemperatureWAXS

Periodic Polyethylene Sulfonates from Polyesterification: Bulk and Nanoparticle Morphologies and Ionic Conductivities

Rank, Christina; Yan, Lu; Mecking, Stefan; Winey, Karen I.

A series of polyethylene-like ionomers with periodic sulfonate groups were synthesized by polyesterification of octatetracontane-1,48-diol and tetrabutylammonium dimethyl sulfosuccinate. Optional cation exchange in aqueous dispersions replaced the NBu4+ counterions for Na+ or Cs+. The defined periodic microstructure of the polymers leads to the formation of layered structures in bulk and…
ApplicationCharacteristic dimensionCharacterizationCustomer publicationsFractal dimensionMaterialPhase analysisPorous materialSAXSStructural biologyTechnique

Crystal Chemistry and SAXS Studies of an Octahedral Polyoxoarsenotungstate Nanocluster Encapsulating Four Unprecedented Thorium Arsenate Fragments (Th3As2On – n = 25 or 26)

Dufaye, Maxime; Duval, Sylvain; Stoclet, Grégory; Loiseau, Thierry

The reaction of 8– with the 5f tetravalent thorium cation in presence of an acetate buffer and KCl at pH = 4.7 gives rise to the formation of an octahedral polyoxoarsenotungstate nanocluster 38–. This molecule is constructed around four unprecedented Th3As2On (n = 25 or 26) fragments stabilized by the…