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(Natural) polymers

Unprecedented Halide-Ion Binding and Catalytic Activity of Nanoscale Anionic Metal Oxide Clusters

She, Shan; Li, Mu; Li, Qi; Huang, Zehuan; Wei, Yongge; Yin, Panchao

(Natural) polymersApplicationCharacterizationCustomer publicationsInorganic materialInorganic materialsMaterialSAXSSizeTechnique

Unprecedented Halide-Ion Binding and Catalytic Activity of Nanoscale Anionic Metal Oxide Clusters

She, Shan; Li, Mu; Li, Qi; Huang, Zehuan; Wei, Yongge; Yin, Panchao

One halide ion (X?) can bind on the surface of nanoscale Anderson-type polyoxometalate (POMs) clusters 3AlMo6O18(OH)3, and form stable complexes in solution with binding constant K=1.53×103. Single-crystal structural analysis showed that this binding behavior occurs through multiple hydrogen bonding between X? and three hydroxy groups on the uncapped side of…
Effects of an ionic liquid and processing conditions on the ?-polymorph crystal formation in poly(vinylidene fluoride)

Pickford, Tom; Gu, Xu; L. Heeley, Ellen; Wan, Chaoying

(Natural) polymersApplicationCharacterizationCompositesCrystalline fractionCustomer publicationsMaterialPhase analysisPolymer researchSAXSTechniqueWAXS

Effects of an ionic liquid and processing conditions on the ?-polymorph crystal formation in poly(vinylidene fluoride)

Pickford, Tom; Gu, Xu; L. Heeley, Ellen; Wan, Chaoying

The piezoelectric properties of poly?vinylidene fluoride) (PVDF) are determined by the prevalence and orientation of its polar ?-crystal phase, which can be tuned by processing conditions, additives, mechanical stretching or post-treatment. Here, the effects of three types of processing conditions on the crystalline structure evolution of PVDF were investigated; electrospinning,…
Supramolecular luminescent triblock copolymer thermoplastic elastomer via metal-ligand coordination

Jiang, Feng; Zhang, Xin; Hwang, Wonseok; Briber, Robert M.; Fang, Yanxiong; Wang, Howard

(Natural) polymersApplicationCharacteristic dimensionCharacterizationCustomer publicationsMaterialPolymer researchSAXSTechnique

Supramolecular luminescent triblock copolymer thermoplastic elastomer via metal-ligand coordination

Jiang, Feng; Zhang, Xin; Hwang, Wonseok; Briber, Robert M.; Fang, Yanxiong; Wang, Howard

We have performed synthesis and testing of novel supramolecular thermoplastic elastomers (TPEs). The polymers incorporate metal-ligand bonds between terbium (Tb3+) ions and imidazole groups in a triblock copolymer poly(isobornyl acrylate)-block-poly(n-butyl acrylate-co-1-vinylimidazole)-block-poly(isobornyl acrylate) (PIBA-b-P(BA-co-VI)-b-PIBA) as a second reversible physical cross-link in…
Ballistic thermal phonons traversing nanocrystalline domains in oriented polyethylene

Robbins, Andrew B.; Drakopoulos, Stavros X.; Martin-Fabiani, Ignacio; Ronca, Sara; Minnich, Austin J.

(Natural) polymersApplicationCharacterizationCompositesCrystalline fractionCustomer publicationsMaterialOtherPolymer researchSAXSTechniqueWAXS

Ballistic thermal phonons traversing nanocrystalline domains in oriented polyethylene

Robbins, Andrew B.; Drakopoulos, Stavros X.; Martin-Fabiani, Ignacio; Ronca, Sara; Minnich, Austin J.

Polymer crystals that are good conductors of heat are highly desirable for thermal management applications. Although thermally conductive polymer crystals are well known, the microscopic thermal transport processes that enable these properties have been challenging to probe experimentally. We used an optical method to probe heat conduction at submicrometer length…
Improvement in mechanical and structural properties of poly(ethylene terephthalate) nanohybrid

Saxena, Dipti; Rana, Dipak; Bhoje Gowd, E.; Maiti, Pralay

(Natural) polymersApplicationCharacteristic dimensionCharacterizationCompositesCustomer publicationsMaterialOrientation analysisPolymer researchSAXSTechnique

Improvement in mechanical and structural properties of poly(ethylene terephthalate) nanohybrid

Saxena, Dipti; Rana, Dipak; Bhoje Gowd, E.; Maiti, Pralay

The wide range of applicability of poly(ethylene terephthalate) (PET) in various fields such as packaging, automobile parts, sports and textile due to its transparent nature, light weight and mechanical properties creates strong case to enhance its mechanical properties. By embedding nanofillers and thereby improving the mechanical properties, this spectrum can…
Pendant side-chain sterics against electrostatic forces: Influencing short-range ordering in random polyelectrolytes

Nwosu, Chinomso; Coughlin, E. Bryan

(Natural) polymersApplicationCharacteristic dimensionCharacterizationCustomer publicationsMaterialPolymer researchTechniqueWAXS

Pendant side-chain sterics against electrostatic forces: Influencing short-range ordering in random polyelectrolytes

Nwosu, Chinomso; Coughlin, E. Bryan

The length of pendant side chains in charged, random, comb-shaped polymers dictates the nature of their short-range ordering. Random copolymers, and terpolymer, of 4-vinylpyridine (4VP), styrene, and isoprene were synthesized and subsequently fully quaternized with 1-alkylbromides having varying number of carbons on the alkyl group ranging from 2 to 8.…
Bacteria-Resistant, Transparent, Free-Standing Films Prepared from Complex Coacervates

Kurtz, Irene S.; Sui, Shuo; Hao, Xi; Huang, Mengfei; Perry, Sarah L.; Schiffman, Jessica D.

(Natural) polymersApplicationCharacterizationCustomer publicationsMaterialOtherOtherSAXSTechniqueWAXS

Bacteria-Resistant, Transparent, Free-Standing Films Prepared from Complex Coacervates

Kurtz, Irene S.; Sui, Shuo; Hao, Xi; Huang, Mengfei; Perry, Sarah L.; Schiffman, Jessica D.

We report the fabrication, properties, and bacteria-resistance of polyelectrolyte complex (PEC) coatings and free-standing films. Poly(4-styrenesulfonic acid), poly(diallyldimethylammonium chloride), and salt were spin-coated into PEC films. After thermal annealing in a humid environment, highly transparent, mechanically strong, and chemically robust films were formed. Notably, we demonstrate