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(Natural) polymers

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

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

(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…
Phase separation and performance of polyethersulfone/cellulose nanocrystals membranes

Lessan, Fatemeh; Karimi, Mohammad; Bañuelos, Jose Leobardo; Foudazi, Reza

(Natural) polymersApplicationCharacterizationCompositesCustomer publicationsFractal dimensionMaterialOtherOtherPolymer researchSAXSSizeTechnique

Phase separation and performance of polyethersulfone/cellulose nanocrystals membranes

Lessan, Fatemeh; Karimi, Mohammad; Bañuelos, Jose Leobardo; Foudazi, Reza

We investigate the effect of cellulose nanocrystals (CNC) as a hydrophilic nanoparticle on the characteristics of polyethersulfone (PES) based membranes. The membranes are fabricated using typical nonsolvent induced phase separation (NIPS) method. We study the radius of gyration and aggregation of PES in dimethylformamide in the presence of CNC, the…
Preparation, Structure, and Properties of an Isotactic Polypropylene Film with Ultrahigh Content, Ordered, and Continuous ?-Transcrystallinity

Liang, Guixue; Yang, Shuo; Li, Jiang; Guo, Shaoyun

(Natural) polymersApplicationCharacterizationCustomer publicationsMaterialOrientation analysisPolymer researchSAXSTechniqueTensile

Preparation, Structure, and Properties of an Isotactic Polypropylene Film with Ultrahigh Content, Ordered, and Continuous ?-Transcrystallinity

Liang, Guixue; Yang, Shuo; Li, Jiang; Guo, Shaoyun

?-Transcrystallinity (?-TC) of polypropylene (PP) is a novel kind of crystal that is of significant importance. Owing to the low content, discontinuity, and random distribution of ?-TC obtained by traditional methods, there has not been significant research on this particular crystal. Thus, its formation mechanism and growth law remain unclear…
Moebius strips of chiral block copolymers

Geng, Zhen; Xiong, Bijin; Wang, Liquan; Wang, Ke; Ren, Min; Zhang, Lianbin; Zhu, Jintao; Yang, Zhenzhong

(Natural) polymersApplicationCharacteristic dimensionCharacterizationCustomer publicationsMaterialPolymer researchSelf-assembled materialTechniqueWAXS

Moebius strips of chiral block copolymers

Geng, Zhen; Xiong, Bijin; Wang, Liquan; Wang, Ke; Ren, Min; Zhang, Lianbin; Zhu, Jintao; Yang, Zhenzhong

The Moebius topology (twisted, single-sided strip) is intriguing because of its structural elegance and distinct properties. Here we report the generation of block copolymer Moebius strips via a fast self-assembly of chiral block copolymer polystyrene-block-poly(D-lactide acid) (PS-b-PDLA) in tetrahydrofuran/water mixed solvents. The Moebius strip is formed by morphological evolution from…
Transition Pathway between Gyroid and Cylindrical Morphology in Linear Triblock Terpolymer Thin Films

Guliyeva, Aynur; Vayer, Marylène; Warmont, Fabienne; Takano, Atsushi; Matsushita, Yushu; Sinturel, Christophe

(Natural) polymersApplicationCharacterizationCustomer publicationsGISAXSMaterialPhase analysisPolymer researchSelf-assembled materialSurface structure and patternsTechnique

Transition Pathway between Gyroid and Cylindrical Morphology in Linear Triblock Terpolymer Thin Films

Guliyeva, Aynur; Vayer, Marylène; Warmont, Fabienne; Takano, Atsushi; Matsushita, Yushu; Sinturel, Christophe

A new transition between alternating gyroid (GA) structure and cylindrical morphology was observed in thin films for a poly(isoprene-block-styrene-block-(2-vinylpyridine)) (ISP) triblock terpolymer (I/S/P volume fraction = 0.20:0.66:0.14) exhibiting in bulk a Q214 (space group I4132) morphology. Thin films were organized using solvent vapor annealing (SVA) and characterized by atomic force…
Relation Between Charge Transport and the Number of Interconnected Lamellar Poly(3-Hexylthiophene) Crystals

Wang, Binghua; Chen, Jingbo; Shen, Changyu; Reiter, Günter; Zhang, Bin

(Natural) polymersApplicationCharacterizationCustomer publicationsGIWAXSMaterialOrientation analysisRenewable energySurface structure and patternsTechnique

Relation Between Charge Transport and the Number of Interconnected Lamellar Poly(3-Hexylthiophene) Crystals

Wang, Binghua; Chen, Jingbo; Shen, Changyu; Reiter, Günter; Zhang, Bin

We have investigated the lateral charge transport in a multilamellar network of crystalline structures of poly(3-hexylthiophene) (P3HT) embedded in a matrix of small crystallites and amorphous polymers resulting from crystallization at temperatures close to the melting point. Removing the matrix by an appropriate washing process allowed us to observe a…